move test helpers from demo app to tests/

demo/static/tests/helpers/index.ts

@@ -1,11 +1,6 @@
 export { MockRouter } from "./mock_router";
 export { MockServer } from "./mock_server";
 export { makeMenuInfo, makeTestData, TestData } from "./test_data";
-export { makeTestEnv, makeTestWEnv, TestEnv, TestInfo } from "./test_env";
-export {
-  makeDeferred,
-  makeTestFixture,
-  nextMicroTick,
-  nextTick,
-  normalize
-} from "./test_utils";
+export { makeTestEnv, TestEnv, TestInfo } from "./test_env";
+
+export * from "../../../../tests/helpers";

demo/static/tests/helpers/test_utils.ts

@@ -1,33 +0,0 @@
-export function nextMicroTick(): Promise<void> {
-  return Promise.resolve();
-}
-
-export function nextTick(): Promise<void> {
-  return new Promise(resolve => setTimeout(resolve));
-}
-
-export function makeTestFixture() {
-  let fixture = document.createElement("div");
-  document.body.appendChild(fixture);
-  return fixture;
-}
-
-export function normalize(str: string): string {
-  return str.replace(/\s+/g, "");
-}
-
-interface Deferred extends Promise<any> {
-  resolve(val?: any): void;
-  reject(): void;
-}
-
-export function makeDeferred(): Deferred {
-  let resolve, reject;
-  let def = new Promise((_resolve, _reject) => {
-    resolve = _resolve;
-    reject = _reject;
-  });
-  (<Deferred>def).resolve = resolve;
-  (<Deferred>def).reject = reject;
-  return <Deferred>def;
-}