[REF] initial prototype of owl 2

tests/components/error_handling.test.ts

@@ -0,0 +1,42 @@
+import { Component, mount } from "../../src";
+import { status } from "../../src/component/status";
+import { xml } from "../../src/tags";
+import { makeTestFixture, snapshotEverything } from "../helpers";
+
+let fixture: HTMLElement;
+
+snapshotEverything();
+
+beforeEach(() => {
+  fixture = makeTestFixture();
+});
+
+describe("basics", () => {
+  test("no component catching error lead to full app destruction", async () => {
+    class ErrorComponent extends Component {
+      static template = xml`<div>hey<t t-esc="props.flag and state.this.will.crash"/></div>`;
+    }
+
+    class Parent extends Component {
+      static template = xml`<div><ErrorComponent flag="state.flag"/></div>`;
+      static components = { ErrorComponent };
+      state = { flag: false };
+    }
+    const parent = await mount(Parent, fixture);
+    expect(fixture.innerHTML).toBe("<div><div>heyfalse</div></div>");
+    parent.state.flag = true;
+
+    let error;
+    try {
+      await parent.render();
+    } catch (e) {
+      error = e;
+    }
+    expect(fixture.innerHTML).toBe("");
+    expect(status(parent)).toBe("destroyed");
+    expect(error).toBeDefined();
+    const regexp =
+      /Cannot read properties of undefined \(reading 'this'\)|Cannot read property 'this' of undefined/g;
+    expect(error.message).toMatch(regexp);
+  });
+});