import { QWeb } from "../../src/qweb/index";
import { nextTick, normalize, renderToDOM, renderToString, trim } from "../helpers";
import { patch } from "../../src/vdom";

//------------------------------------------------------------------------------
// Setup and helpers
//------------------------------------------------------------------------------

// We create before each test:
// - qweb: a new QWeb instance

let qweb: QWeb;

beforeEach(() => {
  QWeb.TEMPLATES = {};
  qweb = new QWeb();
});

//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------

describe("static templates", () => {
  test("simple string", () => {
    qweb.addTemplate("test", "<t>hello vdom</t>");
    expect(renderToString(qweb, "test")).toBe("hello vdom");
  });

  test("simple dynamic value", () => {
    qweb.addTemplate("test", '<t><t t-esc="text"/></t>');
    expect(renderToString(qweb, "test", { text: "hello vdom" })).toBe("hello vdom");
  });

  test("simple string, with some dynamic value", () => {
    qweb.addTemplate("test", '<t>hello <t t-esc="text"/></t>');
    expect(renderToString(qweb, "test", { text: "vdom" })).toBe("hello vdom");
  });

  test("empty div", () => {
    qweb.addTemplate("test", "<div></div>");
    expect(renderToString(qweb, "test")).toBe("<div></div>");
  });

  test("div with a text node", () => {
    qweb.addTemplate("test", "<div>word</div>");
    expect(renderToString(qweb, "test")).toBe("<div>word</div>");
  });

  test("div with a class attribute", () => {
    qweb.addTemplate("test", `<div class="abc">word</div>`);
    expect(renderToString(qweb, "test")).toBe(`<div class="abc">word</div>`);
  });

  test("div with a class attribute with a quote", () => {
    qweb.addTemplate("test", `<div class="a'bc">word</div>`);
    expect(renderToString(qweb, "test")).toBe(`<div class="a'bc">word</div>`);
  });

  test("div with an arbitrary attribute with a quote", () => {
    qweb.addTemplate("test", `<div abc="a'bc">word</div>`);
    expect(renderToString(qweb, "test")).toBe(`<div abc="a'bc">word</div>`);
  });

  test("div with a empty class attribute", () => {
    qweb.addTemplate("test", `<div class="">word</div>`);
    expect(renderToString(qweb, "test")).toBe(`<div>word</div>`);
  });

  test("div with a span child node", () => {
    qweb.addTemplate("test", "<div><span>word</span></div>");
    expect(renderToString(qweb, "test")).toBe("<div><span>word</span></div>");
  });

  test("properly handle comments", () => {
    qweb.addTemplate("test", "<div>hello <!-- comment-->owl</div>");
    expect(renderToString(qweb, "test")).toBe("<div>hello <!-- comment-->owl</div>");
  });

  test("properly handle comments between t-if/t-else", () => {
    qweb.addTemplate(
      "test",
      `
      <div>
        <span t-if="true">true</span>
        <!-- comment-->
        <span t-else="">owl</span>
      </div>`
    );
    expect(renderToString(qweb, "test")).toBe("<div><span>true</span></div>");
  });
});

describe("error handling", () => {
  test("invalid xml", () => {
    expect(() => qweb.addTemplate("test", "<div>")).toThrow("Invalid XML in template");
  });

  test("template with text node and tag", () => {
    qweb.addTemplate("test", `<t>text<span>other node</span></t>`);

    expect(() => renderToString(qweb, "test")).toThrow(
      "A template should not have more than one root node"
    );
  });

  test("nice warning if no template with given name", () => {
    expect(() => qweb.render("invalidname")).toThrow("does not exist");
  });

  test("cannot add twice the same template", () => {
    qweb.addTemplate("test", `<t></t>`);
    expect(() => qweb.addTemplate("test", "<div/>", true)).not.toThrow("already defined");
    expect(() => qweb.addTemplate("test", "<div/>")).toThrow("already defined");
  });

  test("addTemplates throw if parser error", () => {
    expect(() => {
      qweb.addTemplates("<templates><abc>></templates>");
    }).toThrow("Invalid XML in template");
  });

  test("nice error when t-on is evaluated with a missing event", () => {
    qweb.addTemplate("templatename", `<div t-on="somemethod"></div>`);
    expect(() => qweb.render("templatename", { someMethod() {} }, { handlers: [] })).toThrow(
      "Missing event name with t-on directive"
    );
  });

  test("error when unknown directive", () => {
    qweb.addTemplate("templatename", `<div t-best-beer="rochefort 10">test</div>`);
    expect(() => qweb.render("templatename")).toThrow("Unknown QWeb directive: 't-best-beer'");
  });
});

describe("t-esc", () => {
  test("literal", () => {
    qweb.addTemplate("test", `<span><t t-esc="'ok'"/></span>`);
    expect(renderToString(qweb, "test")).toBe("<span>ok</span>");
  });

  test("variable", () => {
    qweb.addTemplate("test", `<span><t t-esc="var"/></span>`);
    expect(renderToString(qweb, "test", { var: "ok" })).toBe("<span>ok</span>");
  });

  test("escaping", () => {
    qweb.addTemplate("test", `<span><t t-esc="var"/></span>`);
    expect(renderToString(qweb, "test", { var: "<ok>abc</ok>" })).toBe(
      "<span>&amp;lt;ok&amp;gt;abc&amp;lt;/ok&amp;gt;</span>"
    );
  });

  test("escaping on a node", () => {
    qweb.addTemplate("test", `<span t-esc="'ok'"/>`);
    expect(renderToString(qweb, "test")).toBe("<span>ok</span>");
  });

  test("escaping on a node with a body", () => {
    qweb.addTemplate("test", `<span t-esc="'ok'">nope</span>`);
    expect(renderToString(qweb, "test")).toBe("<span>ok</span>");
  });

  test("escaping on a node with a body, as a default", () => {
    qweb.addTemplate("test", `<span t-esc="var">nope</span>`);
    expect(renderToString(qweb, "test")).toBe("<span>nope</span>");
  });

  test("t-esc is escaped", () => {
    qweb.addTemplate("test", `<div><t t-set="var"><p>escaped</p></t><t t-esc="var"/></div>`);
    const domRendered = renderToDOM(qweb, "test");
    expect(domRendered.textContent).toBe("<p>escaped</p>");
  });

  test("t-esc=0 is escaped", () => {
    qweb.addTemplate("test", `<span><t t-esc="0"/></span>`);
    qweb.addTemplate("testCaller", `<div><t t-call="test"><p>escaped</p></t></div>`);
    const domRendered = renderToDOM(qweb, "testCaller") as HTMLElement;
    expect(domRendered.querySelector("span")!.textContent).toBe("<p>escaped</p>");
  });

  test("div with falsy values", () => {
    qweb.addTemplate(
      "test",
      `
      <div>
        <p t-esc="v1"/>
        <p t-esc="v2"/>
        <p t-esc="v3"/>
        <p t-esc="v4"/>
        <p t-esc="v5"/>
      </div>`
    );
    const vals = {
      v1: false,
      v2: undefined,
      v3: null,
      v4: 0,
      v5: "",
    };
    expect(renderToString(qweb, "test", vals)).toBe(
      "<div><p>false</p><p></p><p></p><p>0</p><p></p></div>"
    );
  });

  test("t-esc work with spread operator", () => {
    qweb.addTemplate("test", `<span><t t-esc="[...state.list]"/></span>`);
    const result = renderToString(qweb, "test", { state: { list: [1, 2] } });
    expect(result).toBe("<span>1,2</span>");
  });
});

describe("t-raw", () => {
  test("literal", () => {
    qweb.addTemplate("test", `<span><t t-raw="'ok'"/></span>`);
    expect(renderToString(qweb, "test")).toBe("<span>ok</span>");
  });

  test("variable", () => {
    qweb.addTemplate("test", `<span><t t-raw="var"/></span>`);
    expect(renderToString(qweb, "test", { var: "ok" })).toBe("<span>ok</span>");
  });

  test("not escaping", () => {
    qweb.addTemplate("test", `<div><t t-raw="var"/></div>`);
    expect(renderToString(qweb, "test", { var: "<ok></ok>" })).toBe("<div><ok></ok></div>");
  });

  test("t-raw and another sibling node", () => {
    qweb.addTemplate("test", `<span><span>hello</span><t t-raw="var"/></span>`);
    expect(renderToString(qweb, "test", { var: "<ok>world</ok>" })).toBe(
      "<span><span>hello</span><ok>world</ok></span>"
    );
  });
});

describe("t-set", () => {
  test("set from attribute literal", () => {
    qweb.addTemplate("test", `<div><t t-set="value" t-value="'ok'"/><t t-esc="value"/></div>`);
    expect(renderToString(qweb, "test")).toBe("<div>ok</div>");
  });

  test("t-set and t-if", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-set="v" t-value="value"/>
        <t t-if="v === 'ok'">grimbergen</t>
        </div>`
    );
    expect(renderToString(qweb, "test", { value: "ok" })).toBe("<div>grimbergen</div>");
  });

  test("set from body literal", () => {
    qweb.addTemplate("test", `<t><t t-set="value">ok</t><t t-esc="value"/></t>`);
    expect(renderToString(qweb, "test")).toBe("ok");
  });

  test("set from attribute lookup", () => {
    qweb.addTemplate("test", `<div><t t-set="stuff" t-value="value"/><t t-esc="stuff"/></div>`);
    expect(renderToString(qweb, "test", { value: "ok" })).toBe("<div>ok</div>");
  });

  test("t-set evaluates an expression only once", () => {
    qweb.addTemplate(
      "test",
      `<div >
          <t t-set="v" t-value="value + ' artois'"/>
          <t t-esc="v"/>
          <t t-esc="v"/>
        </div>`
    );
    expect(renderToString(qweb, "test", { value: "stella" })).toBe(
      "<div>stella artoisstella artois</div>"
    );
  });

  test("set from body lookup", () => {
    qweb.addTemplate(
      "test",
      `<div><t t-set="stuff"><t t-esc="value"/></t><t t-esc="stuff"/></div>`
    );
    expect(renderToString(qweb, "test", { value: "ok" })).toBe("<div>ok</div>");
  });

  test("set from empty body", () => {
    qweb.addTemplate("test", `<div><t t-set="stuff"/><t t-esc="stuff"/></div>`);
    expect(renderToString(qweb, "test")).toBe("<div></div>");
  });

  test("value priority", () => {
    qweb.addTemplate("test", `<div><t t-set="value" t-value="1">2</t><t t-esc="value"/></div>`);
    expect(renderToString(qweb, "test")).toBe("<div>1</div>");
  });

  test("evaluate value expression", () => {
    qweb.addTemplate("test", `<div><t t-set="value" t-value="1 + 2"/><t t-esc="value"/></div>`);
    expect(renderToString(qweb, "test")).toBe("<div>3</div>");
  });

  test("t-set should reuse variable if possible", () => {
    qweb.addTemplate(
      "test",
      `<div>
          <t t-set="v" t-value="1"/>
          <div t-foreach="list" t-as="elem" t-key="elem_index">
              <span>v<t t-esc="v"/></span>
              <t t-set="v" t-value="elem"/>
          </div>
        </div>`
    );
    expect(normalize(renderToString(qweb, "test", { list: ["a", "b"] }))).toBe(
      "<div><div><span>v1</span></div><div><span>va</span></div></div>"
    );
  });

  test("t-set with content and sub t-esc", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-set="setvar"><t t-esc="beep"/> boop</t>
        <t t-esc="setvar"/>
      </div>`
    );

    expect(renderToString(qweb, "test", { beep: "beep" })).toBe("<div>beep boop</div>");
  });

  test("evaluate value expression, part 2", () => {
    qweb.addTemplate(
      "test",
      `<div><t t-set="value" t-value="somevariable + 2"/><t t-esc="value"/></div>`
    );
    expect(renderToString(qweb, "test", { somevariable: 43 })).toBe("<div>45</div>");
  });

  test("t-set, t-if, and mix of expression/body lookup, 1", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-if="flag" t-set="ourvar">1</t>
        <t t-else="" t-set="ourvar" t-value="0"></t>
        <t t-esc="ourvar"/>
      </div>`
    );
    expect(renderToString(qweb, "test", { flag: true })).toBe("<div>1</div>");
    expect(renderToString(qweb, "test", { flag: false })).toBe("<div>0</div>");
  });

  test("t-set, t-if, and mix of expression/body lookup, 2", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-if="flag" t-set="ourvar" t-value="1"></t>
        <t t-else="" t-set="ourvar">0</t>
        <t t-esc="ourvar"/>
      </div>`
    );
    expect(renderToString(qweb, "test", { flag: true })).toBe("<div>1</div>");
    expect(renderToString(qweb, "test", { flag: false })).toBe("<div>0</div>");
  });

  test("t-set body is evaluated immediately", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-set="v1" t-value="'before'"/>
        <t t-set="v2">
          <span><t t-esc="v1"/></span>
        </t>
        <t t-set="v1" t-value="'after'"/>
        <t t-raw="v2"/>
      </div>`
    );

    expect(renderToString(qweb, "test")).toBe("<div><span>before</span></div>");
  });

  test("t-set with t-value (falsy) and body", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-set="v3" t-value="false"/>
        <t t-set="v1" t-value="'before'"/>
        <t t-set="v2" t-value="v3">
          <span><t t-esc="v1"/></span>
        </t>
        <t t-set="v1" t-value="'after'"/>
        <t t-set="v3" t-value="true"/>
        <t t-raw="v2"/>
      </div>`
    );

    expect(renderToString(qweb, "test")).toBe("<div><span>before</span></div>");
  });

  test("t-set with t-value (truthy) and body", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-set="v3" t-value="'Truthy'"/>
        <t t-set="v1" t-value="'before'"/>
        <t t-set="v2" t-value="v3">
          <span><t t-esc="v1"/></span>
        </t>
        <t t-set="v1" t-value="'after'"/>
        <t t-set="v3" t-value="false"/>
        <t t-raw="v2"/>
      </div>`
    );

    expect(renderToString(qweb, "test")).toBe("<div>Truthy</div>");
  });
});

describe("t-if", () => {
  test("boolean value true condition", () => {
    qweb.addTemplate("test", `<div><t t-if="condition">ok</t></div>`);
    expect(renderToString(qweb, "test", { condition: true })).toBe("<div>ok</div>");
  });

  test("boolean value false condition", () => {
    qweb.addTemplate("test", `<div><t t-if="condition">ok</t></div>`);
    expect(renderToString(qweb, "test", { condition: false })).toBe("<div></div>");
  });

  test("boolean value condition missing", () => {
    qweb.addTemplate("test", `<span><t t-if="condition">fail</t></span>`);
    expect(renderToString(qweb, "test")).toBe("<span></span>");
  });

  test("boolean value condition elif", () => {
    qweb.addTemplate(
      "test",
      `<div><t t-if="color == 'black'">black pearl</t>
        <t t-elif="color == 'yellow'">yellow submarine</t>
        <t t-elif="color == 'red'">red is dead</t>
        <t t-else="">beer</t></div>
    `
    );
    expect(renderToString(qweb, "test", { color: "red" })).toBe("<div>red is dead</div>");
  });

  test("boolean value condition else", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <span>begin</span>
        <t t-if="condition">ok</t>
        <t t-else="">ok-else</t>
        <span>end</span>
      </div>
    `
    );
    const result = trim(renderToString(qweb, "test", { condition: true }));
    expect(result).toBe("<div><span>begin</span>ok<span>end</span></div>");
  });

  test("boolean value condition false else", () => {
    qweb.addTemplate(
      "test",
      `<div><span>begin</span><t t-if="condition">fail</t>
          <t t-else="">fail-else</t><span>end</span></div>
        `
    );
    const result = trim(renderToString(qweb, "test", { condition: false }));
    expect(result).toBe("<div><span>begin</span>fail-else<span>end</span></div>");
  });

  test("can use some boolean operators in expressions", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-if="cond1 and cond2">and</t>
        <t t-if="cond1 and cond3">nope</t>
        <t t-if="cond1 or cond3">or</t>
        <t t-if="cond3 or cond4">nope</t>
        <t t-if="m gt 3">mgt</t>
        <t t-if="n gt 3">ngt</t>
        <t t-if="m lt 3">mlt</t>
        <t t-if="n lt 3">nlt</t>
      </div>`
    );
    const context = {
      cond1: true,
      cond2: true,
      cond3: false,
      cond4: false,
      m: 5,
      n: 2,
    };
    expect(normalize(renderToString(qweb, "test", context))).toBe("<div>andormgtnlt</div>");
  });

  test("t-esc with t-if", () => {
    qweb.addTemplate("test", `<div><t t-if="true" t-esc="'x'"/></div>`);
    expect(renderToString(qweb, "test")).toBe("<div>x</div>");
  });

  test("t-esc with t-elif", () => {
    qweb.addTemplate("test", `<div><t t-if="false">abc</t><t t-else="" t-esc="'x'"/></div>`);
    expect(renderToString(qweb, "test")).toBe("<div>x</div>");
  });

  test("t-set, then t-if", () => {
    qweb.addTemplate(
      "test",
      `
      <div>
        <t t-set="title" t-value="'test'"/>
        <t t-if="title"><t t-esc="title"/></t>
      </div>`
    );
    const result = renderToString(qweb, "test");
    const expected = `<div>test</div>`;
    expect(result).toBe(expected);
  });

  test("t-set, then t-if, part 2", () => {
    qweb.addTemplate(
      "test",
      `
        <div>
            <t t-set="y" t-value="true"/>
            <t t-set="x" t-value="y"/>
            <span t-if="x">COUCOU</span>
        </div>`
    );
    const result = renderToString(qweb, "test");
    const expected = `<div><span>COUCOU</span></div>`;
    expect(result).toBe(expected);
  });

  test("t-set, then t-elif, part 3", () => {
    qweb.addTemplate(
      "test",
      `
        <div>
            <t t-set="y" t-value="false"/>
            <t t-set="x" t-value="y"/>
            <span t-if="x">AAA</span>
            <span t-elif="!x">BBB</span>
        </div>`
    );
    const result = renderToString(qweb, "test");
    const expected = `<div><span>BBB</span></div>`;
    expect(result).toBe(expected);
  });
});

describe("attributes", () => {
  test("static attributes", () => {
    qweb.addTemplate("test", `<div foo="a" bar="b" baz="c"/>`);
    const result = renderToString(qweb, "test");
    const expected = `<div foo="a" bar="b" baz="c"></div>`;
    expect(result).toBe(expected);
  });

  test("static attributes with dashes", () => {
    qweb.addTemplate("test", `<div aria-label="Close"/>`);
    const result = renderToString(qweb, "test");
    const expected = `<div aria-label="Close"></div>`;
    expect(result).toBe(expected);
  });

  test("static attributes on void elements", () => {
    qweb.addTemplate("test", `<img src="/test.jpg" alt="Test"/>`);
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<img src="/test.jpg" alt="Test">`);
  });

  test("dynamic attributes", () => {
    qweb.addTemplate("test", `<div t-att-foo="'bar'"/>`);
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<div foo="bar"></div>`);
  });

  test("dynamic class attribute", () => {
    qweb.addTemplate("test", `<div t-att-class="c"/>`);
    const result = renderToString(qweb, "test", { c: "abc" });
    expect(result).toBe(`<div class="abc"></div>`);
  });

  test("dynamic empty class attribute", () => {
    qweb.addTemplate("test", `<div t-att-class="c"/>`);
    const result = renderToString(qweb, "test", { c: "" });
    expect(result).toBe(`<div></div>`);
  });

  test("dynamic attribute with a dash", () => {
    qweb.addTemplate("test", `<div t-att-data-action-id="id"/>`);
    const result = renderToString(qweb, "test", { id: 32 });
    expect(result).toBe(`<div data-action-id="32"></div>`);
  });

  test("dynamic formatted attributes with a dash", () => {
    qweb.addTemplate("test", `<div t-attf-aria-label="Some text {{id}}"/>`);
    const result = renderToString(qweb, "test", { id: 32 });
    expect(result).toBe(`<div aria-label="Some text 32"></div>`);
  });

  test("fixed variable", () => {
    qweb.addTemplate("test", `<div t-att-foo="value"/>`);
    const result = renderToString(qweb, "test", { value: "ok" });
    expect(result).toBe(`<div foo="ok"></div>`);
  });

  test("dynamic attribute falsy variable ", () => {
    qweb.addTemplate("test", `<div t-att-foo="value"/>`);
    const result = renderToString(qweb, "test", { value: false });
    expect(result).toBe(`<div></div>`);
  });

  test("tuple literal", () => {
    qweb.addTemplate("test", `<div t-att="['foo', 'bar']"/>`);
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<div foo="bar"></div>`);
  });

  test("tuple variable", () => {
    qweb.addTemplate("test", `<div t-att="value"/>`);
    const result = renderToString(qweb, "test", { value: ["foo", "bar"] });
    expect(result).toBe(`<div foo="bar"></div>`);
  });

  test("object", () => {
    qweb.addTemplate("test", `<div t-att="value"/>`);
    const result = renderToString(qweb, "test", {
      value: { a: 1, b: 2, c: 3 },
    });
    expect(result).toBe(`<div a="1" b="2" c="3"></div>`);
  });

  test("format literal", () => {
    qweb.addTemplate("test", `<div t-attf-foo="bar"/>`);
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<div foo="bar"></div>`);
  });

  test("t-attf-class should combine with class", () => {
    qweb.addTemplate("test", `<div class="hello" t-attf-class="world"/>`);
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<div class="hello world"></div>`);
  });

  test("format value", () => {
    qweb.addTemplate("test", `<div t-attf-foo="b{{value}}r"/>`);
    const result = renderToString(qweb, "test", { value: "a" });
    expect(result).toBe(`<div foo="bar"></div>`);
  });

  test("from variables set previously", () => {
    qweb.addTemplate(
      "test",
      `<div><t t-set="abc" t-value="'def'"/><span t-att-class="abc"/></div>`
    );
    const result = renderToString(qweb, "test");
    expect(result).toBe('<div><span class="def"></span></div>');
  });

  test("from object variables set previously", () => {
    // Note: standard qweb does not allow this...
    qweb.addTemplate(
      "test",
      `<div><t t-set="o" t-value="{a:'b'}"/><span t-att-class="o.a"/></div>`
    );
    const result = renderToString(qweb, "test");
    expect(result).toBe('<div><span class="b"></span></div>');
  });

  test("format expression", () => {
    qweb.addTemplate("test", `<div t-attf-foo="{{value + 37}}"/>`);
    const result = renderToString(qweb, "test", { value: 5 });
    expect(result).toBe(`<div foo="42"></div>`);
  });

  test("format expression, other format", () => {
    qweb.addTemplate("test", `<div t-attf-foo="{{value + 37}}"/>`);
    const result = renderToString(qweb, "test", { value: 5 });
    expect(result).toBe(`<div foo="42"></div>`);
  });

  test("format multiple", () => {
    qweb.addTemplate("test", `<div t-attf-foo="a {{value1}} is {{value2}} of {{value3}} ]"/>`);
    const result = renderToString(qweb, "test", {
      value1: 0,
      value2: 1,
      value3: 2,
    });
    expect(result).toBe(`<div foo="a 0 is 1 of 2 ]"></div>`);
  });

  test("various escapes", () => {
    // not needed??
    qweb.addTemplate(
      "test",
      `
         <div foo="&lt;foo"
            t-att-bar="bar"
            t-attf-baz="&lt;{{baz}}&gt;"
            t-att="qux"/>
        `
    );
    const result = renderToString(qweb, "test", {
      bar: 0,
      baz: 1,
      qux: { qux: "<>" },
    });
    const expected = '<div foo="<foo" bar="0" baz="<1>" qux="<>"></div>';
    expect(result).toBe(expected);
  });

  test("t-att-class and class should combine together", () => {
    qweb.addTemplate("test", `<div class="hello" t-att-class="value"/>`);
    const result = renderToString(qweb, "test", { value: "world" });
    expect(result).toBe(`<div class="hello world"></div>`);
  });

  test("class and t-att-class should combine together", () => {
    qweb.addTemplate("test", `<div t-att-class="value" class="hello" />`);
    const result = renderToString(qweb, "test", { value: "world" });
    expect(result).toBe(`<div class="world hello"></div>`);
  });

  test("class and t-attf-class with ternary operation", () => {
    qweb.addTemplate("test", `<div class="hello" t-attf-class="{{value ? 'world' : ''}}"/>`);
    const result = renderToString(qweb, "test", { value: true });
    expect(result).toBe(`<div class="hello world"></div>`);
  });

  test("t-att-class with object", () => {
    qweb.addTemplate("test", `<div class="static" t-att-class="{a: b, c: d, e: f}"/>`);
    const result = renderToString(qweb, "test", { b: true, d: false, f: true });
    expect(result).toBe(`<div class="static a e"></div>`);
  });
});

describe("t-call (template calling", () => {
  test("basic caller", () => {
    qweb.addTemplate("_basic-callee", "<span>ok</span>");
    qweb.addTemplate("caller", '<div><t t-call="_basic-callee"/></div>');
    const expected = "<div><span>ok</span></div>";
    expect(renderToString(qweb, "caller")).toBe(expected);
    expect(qweb.subTemplates["_basic-callee"].toString()).toMatchSnapshot();
  });

  test("basic caller, no parent node", () => {
    qweb.addTemplate("_basic-callee", "<div>ok</div>");
    qweb.addTemplate("caller", '<t t-call="_basic-callee"/>');
    const expected = "<div>ok</div>";
    expect(renderToString(qweb, "caller")).toBe(expected);
    expect(qweb.subTemplates["_basic-callee"].toString()).toMatchSnapshot();
  });

  test("t-call with t-if", () => {
    qweb.addTemplate("sub", "<span>ok</span>");
    qweb.addTemplate("caller", '<div><t t-if="flag" t-call="sub"/></div>');
    const expected = "<div><span>ok</span></div>";
    expect(renderToString(qweb, "caller", { flag: true })).toBe(expected);
    expect(qweb.subTemplates["sub"].toString()).toMatchSnapshot();
  });

  test("t-call not allowed on a non t node", () => {
    qweb.addTemplate("_basic-callee", "<t>ok</t>");
    qweb.addTemplate("caller", '<div t-call="_basic-callee"/>');
    expect(() => renderToString(qweb, "caller")).toThrow("Invalid tag");
  });

  test("with unused body", () => {
    qweb.addTemplate("_basic-callee", "<div>ok</div>");
    qweb.addTemplate("caller", '<t t-call="_basic-callee">WHEEE</t>');
    const expected = "<div>ok</div>";
    expect(renderToString(qweb, "caller")).toBe(expected);
  });

  test("with unused setbody", () => {
    qweb.addTemplate("_basic-callee", "<div>ok</div>");
    qweb.addTemplate("caller", '<t t-call="_basic-callee"><t t-set="qux" t-value="3"/></t>');
    const expected = "<div>ok</div>";
    expect(renderToString(qweb, "caller")).toBe(expected);
  });

  test("with used body", () => {
    qweb.addTemplate("_callee-printsbody", '<h1><t t-esc="0"/></h1>');
    qweb.addTemplate("caller", '<t t-call="_callee-printsbody">ok</t>');
    const expected = "<h1>ok</h1>";
    expect(renderToString(qweb, "caller")).toBe(expected);
  });

  test("with used set body", () => {
    qweb.addTemplate("_callee-uses-foo", '<t t-esc="foo"/>');
    qweb.addTemplate(
      "caller",
      `
        <span><t t-call="_callee-uses-foo"><t t-set="foo" t-value="'ok'"/></t></span>`
    );
    const expected = "<span>ok</span>";
    expect(renderToString(qweb, "caller")).toBe(expected);
  });

  test("inherit context", () => {
    qweb.addTemplate("_callee-uses-foo", '<t t-esc="foo"/>');
    qweb.addTemplate(
      "caller",
      `
        <div><t t-set="foo" t-value="1"/><t t-call="_callee-uses-foo"/></div>`
    );
    const expected = "<div>1</div>";
    expect(renderToString(qweb, "caller")).toBe(expected);
  });

  test("scoped parameters", () => {
    qweb.addTemplate("_basic-callee", `<t>ok</t>`);
    qweb.addTemplate(
      "caller",
      `
        <div>
            <t t-call="_basic-callee">
                <t t-set="foo" t-value="42"/>
            </t>
            <t t-esc="foo"/>
        </div>
      `
    );
    const expected = "<div>ok</div>";
    expect(trim(renderToString(qweb, "caller"))).toBe(expected);
  });

  test("call with several sub nodes on same line", () => {
    qweb.addTemplates(`
        <templates>
            <div t-name="SubTemplate">
                <t t-raw="0"/>
            </div>

            <div t-name="main">
                <t t-call="SubTemplate">
                    <span>hey</span> <span>yay</span>
                </t>
            </div>
        </templates>
    `);
    const expected = "<div><div><span>hey</span> <span>yay</span></div></div>";
    expect(renderToString(qweb, "main")).toBe(expected);
    expect(qweb.subTemplates["SubTemplate"].toString()).toMatchSnapshot();
  });

  test("cascading t-call t-raw='0'", () => {
    qweb.addTemplates(`
        <templates>
            <div t-name="finalTemplate">
              <span>cascade 2</span>
              <t t-raw="0"/>
            </div>

            <div t-name="subSubTemplate">
              <t t-call="finalTemplate">
                <span>cascade 1</span>
                <t t-raw="0"/>
              </t>
            </div>

            <div t-name="SubTemplate">
              <t t-call="subSubTemplate">
                <span>cascade 0</span>
                <t t-raw="0"/>
              </t>
            </div>

            <div t-name="main">
              <t t-call="SubTemplate">
                <span>hey</span> <span>yay</span>
              </t>
            </div>
        </templates>
    `);
    const expected =
      "<div><div><div><div><span>cascade 2</span><span>cascade 1</span><span>cascade 0</span><span>hey</span> <span>yay</span></div></div></div></div>";
    expect(renderToString(qweb, "main")).toBe(expected);
  });

  test("recursive template, part 1", () => {
    qweb.addTemplates(`
        <templates>
            <div t-name="recursive">
                <span>hey</span>
                <t t-if="false">
                    <t t-call="recursive"/>
                </t>
            </div>
        </templates>
    `);
    const expected = "<div><span>hey</span></div>";
    expect(renderToString(qweb, "recursive")).toBe(expected);
    const recursiveFn = Object.values(qweb.subTemplates)[0] as any;
    expect(recursiveFn.toString()).toMatchSnapshot();
  });

  test("recursive template, part 2", () => {
    qweb.addTemplates(`
        <templates>
            <div t-name="Parent">
                <t t-call="nodeTemplate">
                    <t t-set="node" t-value="root"/>
                </t>
            </div>
            <div t-name="nodeTemplate">
                <p><t t-esc="node.val"/></p>
                <t t-foreach="node.children or []" t-as="subtree">
                    <t t-call="nodeTemplate">
                        <t t-set="node" t-value="subtree"/>
                    </t>
                </t>
            </div>

        </templates>
    `);
    const root = { val: "a", children: [{ val: "b" }, { val: "c" }] };
    const expected = "<div><div><p>a</p><div><p>b</p></div><div><p>c</p></div></div></div>";
    expect(renderToString(qweb, "Parent", { root }, { fiber: { vars: {}, scope: {} } })).toBe(
      expected
    );
    const recursiveFn = Object.values(qweb.subTemplates)[0] as any;
    expect(recursiveFn.toString()).toMatchSnapshot();
  });

  test("recursive template, part 3", () => {
    qweb.addTemplates(`
        <templates>
            <div t-name="Parent">
                <t t-call="nodeTemplate">
                    <t t-set="node" t-value="root"/>
                </t>
            </div>
            <div t-name="nodeTemplate">
                <p><t t-esc="node.val"/></p>
                <t t-foreach="node.children or []" t-as="subtree">
                    <t t-call="nodeTemplate">
                        <t t-set="node" t-value="subtree"/>
                    </t>
                </t>
            </div>

        </templates>
    `);
    const root = { val: "a", children: [{ val: "b", children: [{ val: "d" }] }, { val: "c" }] };
    const expected =
      "<div><div><p>a</p><div><p>b</p><div><p>d</p></div></div><div><p>c</p></div></div></div>";
    expect(renderToString(qweb, "Parent", { root }, { fiber: {} })).toBe(expected);
    const recursiveFn = Object.values(qweb.subTemplates)[0] as any;
    expect(recursiveFn.toString()).toMatchSnapshot();
  });

  test("recursive template, part 4: with t-set recursive index", () => {
    qweb.addTemplates(`
        <templates>
            <div t-name="Parent">
                <t t-call="nodeTemplate">
                    <t t-set="recursive_idx" t-value="1"/>
                    <t t-set="node" t-value="root"/>
                </t>
            </div>
            <div t-name="nodeTemplate">
                <t t-set="recursive_idx" t-value="recursive_idx + 1"/>
                <p><t t-esc="node.val"/> <t t-esc="recursive_idx"/></p>
                <t t-foreach="node.children or []" t-as="subtree">
                    <t t-call="nodeTemplate">
                        <t t-set="node" t-value="subtree"/>
                    </t>
                </t>
            </div>

        </templates>
    `);
    const root = {
      val: "a",
      children: [{ val: "b", children: [{ val: "c", children: [{ val: "d" }] }] }],
    };
    const expected =
      "<div><div><p>a 2</p><div><p>b 3</p><div><p>c 4</p><div><p>d 5</p></div></div></div></div></div>";
    expect(renderToString(qweb, "Parent", { root })).toBe(expected);
    const recursiveFn = Object.values(qweb.subTemplates)[0] as any;
    expect(recursiveFn.toString()).toMatchSnapshot();
  });

  test("t-call, global templates", () => {
    QWeb.registerTemplate("abcd", '<div><t t-call="john"/></div>');
    qweb.addTemplate("john", `<span>desk</span>`);
    const expected = "<div><span>desk</span></div>";
    expect(trim(renderToString(qweb, "abcd"))).toBe(expected);
  });

  test("t-call, conditional and t-set in t-call body", () => {
    QWeb.registerTemplate("callee1", "<div>callee1</div>");
    QWeb.registerTemplate("callee2", '<div>callee2 <t t-esc="v"/></div>');
    QWeb.registerTemplate(
      "caller",
      `<div>
        <t t-set="v1" t-value="'elif'"/>
        <t t-if="v1 === 'if'" t-call="callee1" />
        <t t-elif="v1 === 'elif'" t-call="callee2" >
          <t t-set="v" t-value="'success'" />
        </t>
       </div>`
    );
    const rendered = renderToString(qweb, "caller");
    expect(rendered).toBe(`<div><div>callee2 success</div></div>`);
  });

  test("t-call with t-set inside and outside", () => {
    qweb.addTemplates(`
      <templates>
        <div t-name="main">
          <t t-foreach="list" t-as="v">
            <t t-set="val" t-value="v.val"/>
            <t t-call="sub">
              <t t-set="val3" t-value="val*3"/>
            </t>
          </t>
        </div>
        <t t-name="sub">
          <span t-esc="val3"/>
        </t>
      </templates>
    `);
    const expected = "<div><span>3</span><span>6</span><span>9</span></div>";
    const context = { list: [{ val: 1 }, { val: 2 }, { val: 3 }] };
    expect(trim(renderToString(qweb, "main", context))).toBe(expected);
  });

  test("t-call with t-set inside and outside. 2", () => {
    qweb.addTemplates(`
      <templates>
        <div t-name="main">
          <t t-foreach="list" t-as="v">
            <t t-set="val" t-value="v.val"/>
            <t t-call="sub">
              <t t-set="val3" t-value="val*3"/>
            </t>
          </t>
        </div>
        <t t-name="sub">
          <span t-esc="val3"/>
          <t t-esc="w"/>
        </t>
        <p t-name="wrapper"><t t-set="w" t-value="'fromwrapper'"/><t t-call="main"/></p>
      </templates>
    `);
    const expected =
      "<p><div><span>3</span>fromwrapper<span>6</span>fromwrapper<span>9</span>fromwrapper</div></p>";
    const context = { list: [{ val: 1 }, { val: 2 }, { val: 3 }] };
    expect(trim(renderToString(qweb, "wrapper", context))).toBe(expected);
  });
});

describe("foreach", () => {
  test("iterate on items", () => {
    qweb.addTemplate(
      "test",
      `
      <div>
        <t t-foreach="[3, 2, 1]" t-as="item">
          [<t t-esc="item_index"/>: <t t-esc="item"/> <t t-esc="item_value"/>]
        </t>
    </div>`
    );
    const result = trim(renderToString(qweb, "test"));
    const expected = `<div>[0:33][1:22][2:11]</div>`;
    expect(result).toBe(expected);
  });

  test("iterate on items (on a element node)", () => {
    qweb.addTemplate(
      "test",
      `
      <div>
        <span t-foreach="[1, 2]" t-as="item" t-key="item"><t t-esc="item"/></span>
    </div>`
    );
    const result = trim(renderToString(qweb, "test"));
    const expected = `<div><span>1</span><span>2</span></div>`;
    expect(result).toBe(expected);
  });

  test("iterate, position", () => {
    qweb.addTemplate(
      "test",
      `
      <div>
        <t t-foreach="Array(5)" t-as="elem">
          -<t t-if="elem_first"> first</t><t t-if="elem_last"> last</t> (<t t-esc="elem_index"/>)
        </t>
      </div>`
    );
    const result = trim(renderToString(qweb, "test"));
    const expected = `<div>-first(0)-(1)-(2)-(3)-last(4)</div>`;
    expect(result).toBe(expected);
  });

  test("iterate, dict param", () => {
    qweb.addTemplate(
      "test",
      `
      <div>
        <t t-foreach="value" t-as="item">
          [<t t-esc="item_index"/>: <t t-esc="item"/> <t t-esc="item_value"/>]
        </t>
      </div>`
    );
    const result = trim(renderToString(qweb, "test", { value: { a: 1, b: 2, c: 3 } }));
    const expected = `<div>[0:a1][1:b2][2:c3]</div>`;
    expect(result).toBe(expected);
  });

  test("does not pollute the rendering context", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-foreach="[1]" t-as="item"><t t-esc="item"/></t>
      </div>`
    );
    const context = { __owl__: {} };
    renderToString(qweb, "test", context);
    expect(Object.keys(context)).toEqual(["__owl__"]);
  });

  test("t-foreach in t-forach", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <t t-foreach="numbers" t-as="number">
          <t t-foreach="letters" t-as="letter">
            [<t t-esc="number"/><t t-esc="letter"/>]
          </t>
        </t>
      </div>`
    );
    const context = { numbers: [1, 2, 3], letters: ["a", "b"] };
    expect(renderToString(qweb, "test", context)).toBe(
      "<div> [1a]  [1b]  [2a]  [2b]  [3a]  [3b] </div>"
    );
  });

  test("throws error if invalid loop expression", () => {
    qweb.addTemplate(
      "test",
      `<div><t t-foreach="abc" t-as="item"><span t-key="item_index"/></t></div>`
    );
    expect(() => qweb.render("test")).toThrow("Invalid loop expression");
  });

  test("warn if no key in some case", () => {
    const consoleWarn = console.warn;
    console.warn = jest.fn();

    qweb.addTemplate(
      "test",
      `
      <div>
        <t t-foreach="[1, 2]" t-as="item">
          <span><t t-esc="item"/></span>
        </t>
    </div>`
    );
    renderToString(qweb, "test");
    expect(console.warn).toHaveBeenCalledTimes(1);
    expect(console.warn).toHaveBeenCalledWith(
      "Directive t-foreach should always be used with a t-key! (in template: 'test')"
    );
    console.warn = consoleWarn;
  });
});

describe("misc", () => {
  test("global", () => {
    qweb.addTemplate("_callee-asc", `<año t-att-falló="'agüero'" t-raw="0"/>`);
    qweb.addTemplate("_callee-uses-foo", `<span t-esc="foo">foo default</span>`);
    qweb.addTemplate("_callee-asc-toto", `<div t-raw="toto">toto default</div>`);
    qweb.addTemplate(
      "caller",
      `
      <div>
        <t t-foreach="[4,5,6]" t-as="value">
          <span t-esc="value"/>
          <t t-call="_callee-asc">
            <t t-call="_callee-uses-foo">
                <t t-set="foo" t-value="'aaa'"/>
            </t>
            <t t-call="_callee-uses-foo"/>
            <t t-set="foo" t-value="'bbb'"/>
            <t t-call="_callee-uses-foo"/>
          </t>
        </t>
        <t t-call="_callee-asc-toto"/>
      </div>
    `
    );
    const result = trim(renderToString(qweb, "caller"));
    const expected = trim(`
      <div>
        <span>4</span>
        <año falló="agüero">
          <span>aaa</span>
          <span>foo default</span>
          <span>bbb</span>
        </año>

        <span>5</span>
        <año falló="agüero">
          <span>aaa</span>
          <span>foo default</span>
          <span>bbb</span>
        </año>

        <span>6</span>
        <año falló="agüero">
          <span>aaa</span>
          <span>foo default</span>
          <span>bbb</span>
        </año>

        <div>toto default</div>
      </div>
    `);
    expect(result).toBe(expected);
  });
});

describe("t-on", () => {
  test("can bind event handler", () => {
    qweb.addTemplate("test", `<button t-on-click="add">Click</button>`);
    let a = 1;
    const node = renderToDOM(
      qweb,
      "test",
      {
        add() {
          a = 3;
        },
      },
      { handlers: [] }
    );
    (<HTMLElement>node).click();
    expect(a).toBe(3);
  });

  test("can bind two event handlers", () => {
    qweb.addTemplate(
      "test",
      `<button t-on-click="handleClick" t-on-dblclick="handleDblClick">Click</button>`
    );
    let steps: string[] = [];
    const node = renderToDOM(
      qweb,
      "test",
      {
        handleClick() {
          steps.push("click");
        },
        handleDblClick() {
          steps.push("dblclick");
        },
      },
      { handlers: [] }
    );
    expect(steps).toEqual([]);
    (<HTMLElement>node).click();
    expect(steps).toEqual(["click"]);
    (<HTMLElement>node).dispatchEvent(new Event("dblclick"));
    expect(steps).toEqual(["click", "dblclick"]);
  });

  test("can bind handlers with arguments", () => {
    qweb.addTemplate("test", `<button t-on-click="add(5)">Click</button>`);
    let a = 1;
    const node = renderToDOM(
      qweb,
      "test",
      {
        add(n) {
          a = a + n;
        },
      },
      { handlers: [] }
    );
    (<HTMLElement>node).click();
    expect(a).toBe(6);
  });

  test("can bind handlers with object arguments", () => {
    qweb.addTemplate("test", `<button t-on-click="add({val: 5})">Click</button>`);
    let a = 1;
    const node = renderToDOM(
      qweb,
      "test",
      {
        add({ val }) {
          a = a + val;
        },
      },
      { handlers: [] }
    );
    (<HTMLElement>node).click();
    expect(a).toBe(6);
  });

  test("can bind handlers with empty object", () => {
    expect.assertions(2);
    qweb.addTemplate("test", `<button t-on-click="doSomething({})">Click</button>`);
    const node = renderToDOM(
      qweb,
      "test",
      {
        doSomething(arg) {
          expect(arg).toEqual({});
        },
      },
      { handlers: [] }
    );
    (<HTMLElement>node).click();
  });

  test("can bind handlers with empty object (with non empty inner string)", () => {
    expect.assertions(2);
    qweb.addTemplate("test", `<button t-on-click="doSomething({ })">Click</button>`);
    const node = renderToDOM(
      qweb,
      "test",
      {
        doSomething(arg) {
          expect(arg).toEqual({});
        },
      },
      { handlers: [] }
    );
    (<HTMLElement>node).click();
  });

  test("can bind handlers with loop variable as argument", () => {
    expect.assertions(2);
    qweb.addTemplate(
      "test",
      `
      <ul>
        <li t-foreach="['someval']" t-as="action" t-key="action_index"><a t-on-click="activate(action)">link</a></li>
      </ul>`
    );
    const node = renderToDOM(
      qweb,
      "test",
      {
        activate(action) {
          expect(action).toBe("someval");
        },
      },
      { handlers: [] }
    );
    (<HTMLElement>node).getElementsByTagName("a")[0].click();
  });

  test("handler is bound to proper owner", () => {
    expect.assertions(2);
    qweb.addTemplate("test", `<button t-on-click="add">Click</button>`);
    let owner = {
      add() {
        expect(this).toBe(owner);
      },
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });
    (<HTMLElement>node).click();
  });

  test("t-on with inline statement", () => {
    qweb.addTemplate("test", `<button t-on-click="state.counter++">Click</button>`);
    let owner = {
      state: {
        counter: 0,
      },
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });
    expect(owner.state.counter).toBe(0);
    (<HTMLElement>node).click();
    expect(owner.state.counter).toBe(1);
  });

  test("t-on with inline statement (function call)", () => {
    qweb.addTemplate("test", `<button t-on-click="state.incrementCounter(2)">Click</button>`);
    let owner = {
      state: {
        counter: 0,
        incrementCounter: (inc) => {
          owner.state.counter += inc;
        },
      },
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });
    expect(owner.state.counter).toBe(0);
    (<HTMLElement>node).click();
    expect(owner.state.counter).toBe(2);
  });

  test("t-on with inline statement, part 2", () => {
    qweb.addTemplate("test", `<button t-on-click="state.flag = !state.flag">Toggle</button>`);
    let owner = {
      state: {
        flag: true,
      },
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });
    expect(owner.state.flag).toBe(true);
    (<HTMLElement>node).click();
    expect(owner.state.flag).toBe(false);
    (<HTMLElement>node).click();
    expect(owner.state.flag).toBe(true);
  });

  test("t-on with inline statement, part 3", () => {
    qweb.addTemplate("test", `<button t-on-click="state.n = someFunction(3)">Toggle</button>`);
    let owner = {
      someFunction(n) {
        return n + 1;
      },
      state: {
        n: 11,
      },
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });
    expect(owner.state.n).toBe(11);
    (<HTMLElement>node).click();
    expect(owner.state.n).toBe(4);
  });

  test("t-on with t-call", async () => {
    expect.assertions(2);
    qweb.addTemplate("sub", `<p t-on-click="update">lucas</p>`);
    qweb.addTemplate("main", `<div><t t-call="sub"/></div>`);

    let owner = {
      update() {
        expect(this).toBe(owner);
      },
    };

    const node = renderToDOM(qweb, "main", owner, { handlers: [] });
    (<HTMLElement>node).querySelector("p")!.click();
  });

  test("t-on, with arguments and t-call", async () => {
    expect.assertions(3);
    qweb.addTemplate("sub", `<p t-on-click="update(value)">lucas</p>`);
    qweb.addTemplate("main", `<div><t t-call="sub"/></div>`);

    let owner = {
      update(val) {
        expect(this).toBe(owner);
        expect(val).toBe(444);
      },
      value: 444,
    };

    const node = renderToDOM(qweb, "main", owner, { handlers: [] });
    (<HTMLElement>node).querySelector("p")!.click();
  });

  test("t-on with prevent and/or stop modifiers", async () => {
    expect.assertions(7);
    qweb.addTemplate(
      "test",
      `<div>
        <button t-on-click.prevent="onClickPrevented">Button 1</button>
        <button t-on-click.stop="onClickStopped">Button 2</button>
        <button t-on-click.prevent.stop="onClickPreventedAndStopped">Button 3</button>
      </div>`
    );
    let owner = {
      onClickPrevented(e) {
        expect(e.defaultPrevented).toBe(true);
        expect(e.cancelBubble).toBe(false);
      },
      onClickStopped(e) {
        expect(e.defaultPrevented).toBe(false);
        expect(e.cancelBubble).toBe(true);
      },
      onClickPreventedAndStopped(e) {
        expect(e.defaultPrevented).toBe(true);
        expect(e.cancelBubble).toBe(true);
      },
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });

    const buttons = (<HTMLElement>node).getElementsByTagName("button");
    buttons[0].click();
    buttons[1].click();
    buttons[2].click();
  });

  test("t-on with self modifier", async () => {
    expect.assertions(2);
    qweb.addTemplate(
      "test",
      `<div>
        <button t-on-click="onClick"><span>Button</span></button>
        <button t-on-click.self="onClickSelf"><span>Button</span></button>
      </div>`
    );
    let steps: string[] = [];
    let owner = {
      onClick(e) {
        steps.push("onClick");
      },
      onClickSelf(e) {
        steps.push("onClickSelf");
      },
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });

    const buttons = (<HTMLElement>node).getElementsByTagName("button");
    const spans = (<HTMLElement>node).getElementsByTagName("span");
    spans[0].click();
    spans[1].click();
    buttons[0].click();
    buttons[1].click();

    expect(steps).toEqual(["onClick", "onClick", "onClickSelf"]);
  });

  test("t-on with self and prevent modifiers (order matters)", async () => {
    expect.assertions(2);
    qweb.addTemplate(
      "test",
      `<div>
        <button t-on-click.self.prevent="onClick"><span>Button</span></button>
      </div>`
    );
    let steps: boolean[] = [];
    let owner = {
      onClick() {},
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });
    (<HTMLElement>node).addEventListener("click", function (e) {
      steps.push(e.defaultPrevented);
    });

    const button = (<HTMLElement>node).getElementsByTagName("button")[0];
    const span = (<HTMLElement>node).getElementsByTagName("span")[0];
    span.click();
    button.click();

    expect(steps).toEqual([false, true]);
  });

  test("t-on with prevent and self modifiers (order matters)", async () => {
    expect.assertions(2);
    qweb.addTemplate(
      "test",
      `<div>
        <button t-on-click.prevent.self="onClick"><span>Button</span></button>
      </div>`
    );
    let steps: boolean[] = [];
    let owner = {
      onClick() {},
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });
    (<HTMLElement>node).addEventListener("click", function (e) {
      steps.push(e.defaultPrevented);
    });

    const button = (<HTMLElement>node).getElementsByTagName("button")[0];
    const span = (<HTMLElement>node).getElementsByTagName("span")[0];
    span.click();
    button.click();

    expect(steps).toEqual([true, true]);
  });

  test("t-on with prevent modifier in t-foreach", async () => {
    expect.assertions(5);
    qweb.addTemplate(
      "test",
      `<div>
        <t t-foreach="projects" t-as="project">
          <a href="#" t-key="project" t-on-click.prevent="onEdit(project.id)">
            Edit <t t-esc="project.name"/>
          </a>
        </t>
      </div>`
    );
    const steps: string[] = [];
    const owner = {
      projects: [
        { id: 1, name: "Project 1" },
        { id: 2, name: "Project 2" },
      ],

      onEdit(projectId, ev) {
        expect(ev.defaultPrevented).toBe(true);
        steps.push(projectId);
      },
    };

    const node = <HTMLElement>renderToDOM(qweb, "test", owner, { handlers: [] });
    expect(node.outerHTML).toBe(
      `<div><a href="#"> Edit Project 1</a><a href="#"> Edit Project 2</a></div>`
    );

    const links = node.querySelectorAll("a")!;
    links[0].click();
    links[1].click();

    expect(steps).toEqual([1, 2]);
  });

  test("t-on with empty handler (only modifiers)", () => {
    expect.assertions(2);
    qweb.addTemplate(
      "test",
      `<div>
        <button t-on-click.prevent="">Button</button>
      </div>`
    );
    const node = renderToDOM(qweb, "test", {}, { handlers: [] });

    node.addEventListener("click", (e) => {
      expect(e.defaultPrevented).toBe(true);
    });

    const button = (<HTMLElement>node).getElementsByTagName("button")[0];
    button.click();
  });

  test("t-on combined with t-esc", async () => {
    expect.assertions(3);
    qweb.addTemplate("test", `<div><button t-on-click="onClick" t-esc="text"/></div>`);
    const steps: string[] = [];
    const owner = {
      text: "Click here",
      onClick() {
        steps.push("onClick");
      },
    };

    const node = <HTMLElement>renderToDOM(qweb, "test", owner, { handlers: [] });
    expect(node.outerHTML).toBe(`<div><button>Click here</button></div>`);

    node.querySelector("button")!.click();

    expect(steps).toEqual(["onClick"]);
  });

  test("t-on combined with t-raw", async () => {
    expect.assertions(3);
    qweb.addTemplate("test", `<div><button t-on-click="onClick" t-raw="html"/></div>`);
    const steps: string[] = [];
    const owner = {
      html: "Click <b>here</b>",
      onClick() {
        steps.push("onClick");
      },
    };

    const node = <HTMLElement>renderToDOM(qweb, "test", owner, { handlers: [] });
    expect(node.outerHTML).toBe(`<div><button>Click <b>here</b></button></div>`);

    node.querySelector("button")!.click();

    expect(steps).toEqual(["onClick"]);
  });

  test("t-on with .capture modifier", () => {
    expect.assertions(2);
    qweb.addTemplate(
      "test",
      `<div t-on-click.capture="onCapture">
        <button t-on-click="doSomething">Button</button>
      </div>`
    );

    const steps: string[] = [];
    const owner = {
      onCapture() {
        steps.push("captured");
      },
      doSomething() {
        steps.push("normal");
      },
    };
    const node = renderToDOM(qweb, "test", owner, { handlers: [] });

    const button = (<HTMLElement>node).getElementsByTagName("button")[0];
    button.click();
    expect(steps).toEqual(["captured", "normal"]);
  });
});

describe("t-ref", () => {
  test("can get a ref on a node", () => {
    qweb.addTemplate("test", `<div><span t-ref="myspan"/></div>`);
    let refs: any = {};
    renderToDOM(qweb, "test", { __owl__: { refs } });
    expect(refs.myspan.tagName).toBe("SPAN");
  });

  test("can get a dynamic ref on a node", () => {
    qweb.addTemplate("test", `<div><span t-ref="myspan{{id}}"/></div>`);
    let refs: any = {};
    renderToDOM(qweb, "test", { id: 3, __owl__: { refs } });
    expect(refs.myspan3.tagName).toBe("SPAN");
  });

  test("refs in a loop", () => {
    qweb.addTemplate(
      "test",
      `
      <div>
        <t t-foreach="items" t-as="item">
          <div t-ref="{{item}}" t-key="item"><t t-esc="item"/></div>
        </t>
      </div>`
    );
    let refs: any = {};
    renderToDOM(qweb, "test", { items: [1, 2, 3], __owl__: { refs } });
    expect(Object.keys(refs)).toEqual(["1", "2", "3"]);
  });
});

describe("loading templates", () => {
  test("can initialize qweb with a string", () => {
    const templates = `
      <?xml version="1.0" encoding="UTF-8"?>
      <templates id="template" xml:space="preserve">
        <div t-name="hey">jupiler</div>
      </templates>`;
    const qweb = new QWeb({ templates });
    expect(renderToString(qweb, "hey")).toBe("<div>jupiler</div>");
  });

  test("can load a few templates from a xml string", () => {
    const data = `
      <?xml version="1.0" encoding="UTF-8"?>
      <templates id="template" xml:space="preserve">

        <t t-name="items"><li>ok</li><li>foo</li></t>

        <ul t-name="main"><t t-call="items"/></ul>
      </templates>`;
    qweb.addTemplates(data);
    const result = renderToString(qweb, "main");
    expect(result).toBe("<ul><li>ok</li><li>foo</li></ul>");
  });

  test("does not crash if string does not have templates", () => {
    const data = "";
    qweb.addTemplates(data);
    expect(Object.keys(qweb.templates)).toEqual([]);
  });
});

describe("special cases for some boolean html attributes/properties", () => {
  test("input type= checkbox, with t-att-checked", () => {
    qweb.addTemplate("test", `<input type="checkbox" t-att-checked="flag"/>`);
    const result = renderToString(qweb, "test", { flag: true });
    expect(result).toBe(`<input type="checkbox" checked="">`);
  });

  test("various boolean html attributes", () => {
    // the unique assertion here is the code snapshot automatically done by
    // renderToString
    expect.assertions(1);
    qweb.addTemplate(
      "test",
      `
      <div>
        <input type="checkbox" checked="checked"/>
        <input checked="checked"/>
        <div checked="checked"/>
        <div selected="selected"/>
        <option selected="selected" other="1"/>
        <input readonly="readonly"/>
        <button disabled="disabled"/>
      </div>
      `
    );
    renderToString(qweb, "test", { flag: true });
  });
});

describe("whitespace handling", () => {
  test("white space only text nodes are condensed into a single space", () => {
    qweb.addTemplate("test", `<div>  </div>`);
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<div> </div>`);
  });

  test("consecutives whitespaces are condensed into a single space", () => {
    qweb.addTemplate("test", `<div>  abc  </div>`);
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<div> abc </div>`);
  });

  test("whitespace only text nodes with newlines are removed", () => {
    qweb.addTemplate(
      "test",
      `<div>
        <span>abc</span>
       </div>`
    );
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<div><span>abc</span></div>`);
  });

  test("nothing is done in pre tags", () => {
    qweb.addTemplate("test", `<pre>  </pre>`);
    const result = renderToString(qweb, "test");
    expect(result).toBe(`<pre>  </pre>`);

    const pretagtext = `<pre>
        some text
      </pre>`;
    qweb.addTemplate("test2", pretagtext);
    const result2 = renderToString(qweb, "test2");
    expect(result2).toBe(pretagtext);

    const pretagwithonlywhitespace = `<pre>
        
      </pre>`;
    qweb.addTemplate("test3", pretagwithonlywhitespace);
    const result3 = renderToString(qweb, "test3");
    expect(result3).toBe(pretagwithonlywhitespace);
  });
});

describe("t-key", () => {
  test("can use t-key directive on a node", () => {
    qweb.addTemplate("test", `<div t-key="beer.id"><t t-esc="beer.name"/></div>`);
    expect(renderToString(qweb, "test", { beer: { id: 12, name: "Chimay Rouge" } })).toBe(
      "<div>Chimay Rouge</div>"
    );
  });

  test("t-key directive in a list", () => {
    qweb.addTemplate(
      "test",
      `<ul>
        <li t-foreach="beers" t-as="beer" t-key="beer.id"><t t-esc="beer.name"/></li>
       </ul>`
    );
    expect(
      renderToString(qweb, "test", {
        beers: [{ id: 12, name: "Chimay Rouge" }],
      })
    ).toMatchSnapshot();
  });
});

describe("debugging", () => {
  test("t-debug", () => {
    const consoleLog = console.log;
    console.log = jest.fn();
    qweb.addTemplate(
      "test",
      `<div t-debug=""><t t-if="true"><span t-debug="">hey</span></t></div>`
    );
    qweb.render("test");
    expect(qweb.templates.test.fn.toString()).toMatchSnapshot();

    expect(console.log).toHaveBeenCalledTimes(1);
    console.log = consoleLog;
  });

  test("t-debug on sub template", () => {
    const consoleLog = console.log;
    console.log = jest.fn();
    qweb.addTemplates(`
      <templates>
      <p t-name="sub" t-debug="">coucou</p>
      <div t-name="test">
        <t t-call="sub"/>
      </div>
      </templates>`);
    qweb.render("test");

    expect(console.log).toHaveBeenCalledTimes(1);
    console.log = consoleLog;
  });

  test("t-log", () => {
    const consoleLog = console.log;
    console.log = jest.fn();

    qweb.addTemplate(
      "test",
      `<div>
          <t t-set="foo" t-value="42"/>
          <t t-log="foo + 3"/>
        </div>`
    );
    qweb.render("test");
    expect(qweb.templates.test.fn.toString()).toMatchSnapshot();

    expect(console.log).toHaveBeenCalledWith(45);
    console.log = consoleLog;
  });
});

describe("update on event bus", () => {
  test("two consecutive forceUpdates only causes one listener update", async () => {
    const fn = jest.fn();
    qweb.on("update", null, fn);
    qweb.forceUpdate();
    qweb.forceUpdate();
    expect(fn).toBeCalledTimes(0);
    await nextTick();
    expect(fn).toBeCalledTimes(1);
  });
});

describe("global template registration", () => {
  test("can register template globally", () => {
    expect.assertions(5);
    let qweb = new QWeb();
    try {
      qweb.render("mytemplate");
    } catch (e) {
      expect(e.message).toMatch("Template mytemplate does not exist");
    }
    expect(qweb.templates.mytemplate).toBeUndefined();

    QWeb.registerTemplate("mytemplate", "<div>global</div>");
    expect(qweb.templates.mytemplate).toBeDefined();
    const vnode = qweb.render("mytemplate");
    expect(vnode.sel).toBe("div");
    expect((vnode as any).children[0].text).toBe("global");
  });
});

describe("properly support svg", () => {
  test("add proper namespace to svg", () => {
    qweb.addTemplate(
      "test",
      `<svg width="100px" height="90px"><circle cx="50" cy="50" r="4" stroke="green" stroke-width="1" fill="yellow"/> </svg>`
    );
    expect(renderToString(qweb, "test")).toBe(
      `<svg width=\"100px\" height=\"90px\"><circle cx=\"50\" cy=\"50\" r=\"4\" stroke=\"green\" stroke-width=\"1\" fill=\"yellow\"></circle> </svg>`
    );
  });

  test("add proper namespace to g tags", () => {
    // this is necessary if one wants to use components in a svg
    qweb.addTemplate(
      "test",
      `<g><circle cx="50" cy="50" r="4" stroke="green" stroke-width="1" fill="yellow"/> </g>`
    );
    expect(renderToString(qweb, "test")).toBe(
      `<g><circle cx=\"50\" cy=\"50\" r=\"4\" stroke=\"green\" stroke-width=\"1\" fill=\"yellow\"></circle> </g>`
    );
  });
});

describe("translation support", () => {
  test("can translate node content", () => {
    const translations = {
      word: "mot",
    };
    const translateFn = (expr) => translations[expr] || expr;
    const qweb = new QWeb({ translateFn });
    qweb.addTemplate("test", "<div>word</div>");
    expect(renderToString(qweb, "test")).toBe("<div>mot</div>");
  });

  test("does not translate node content if disabled", () => {
    const translations = {
      word: "mot",
    };
    const translateFn = (expr) => translations[expr] || expr;
    const qweb = new QWeb({ translateFn });
    qweb.addTemplate(
      "test",
      `
      <div>
        <span>word</span>
        <span t-translation="off">word</span>
      </div>`
    );
    expect(renderToString(qweb, "test")).toBe("<div><span>mot</span><span>word</span></div>");
  });

  test("some attributes are translated", () => {
    const translations = {
      word: "mot",
    };
    const translateFn = (expr) => translations[expr] || expr;
    const qweb = new QWeb({ translateFn });
    qweb.addTemplate(
      "test",
      `
      <div>
        <p label="word">word</p>
        <p title="word">word</p>
        <p placeholder="word">word</p>
        <p alt="word">word</p>
        <p something="word">word</p>
      </div>`
    );
    expect(renderToString(qweb, "test")).toBe(
      '<div><p label="mot">mot</p><p title="mot">mot</p><p placeholder="mot">mot</p><p alt="mot">mot</p><p something="word">mot</p></div>'
    );
  });
});

describe("t-key tests", () => {
  test("t-key on t-foreach", async () => {
    qweb.addTemplate(
      "test",
      `
        <div>
          <t t-foreach="things" t-as="thing" t-key="thing">
            <span/>
          </t>
        </div>`
    );

    let vnode = qweb.render("test", { things: [1, 2] });
    vnode = patch(document.createElement("div"), vnode);
    let elm = vnode.elm as HTMLElement;

    expect(elm.outerHTML).toBe("<div><span></span><span></span></div>");

    const first = elm.querySelectorAll("span")[0];
    const second = elm.querySelectorAll("span")[1];

    patch(vnode, qweb.render("test", { things: [2, 1] }));

    expect(elm.outerHTML).toBe("<div><span></span><span></span></div>");

    expect(first).toBe(elm.querySelectorAll("span")[1]);
    expect(second).toBe(elm.querySelectorAll("span")[0]);
  });
});