Move testing utilities to separate package

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/utility-features/test-utils/README.md

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+# @k8slens/test-utils
+
+This package contains many useful utilities for testing.

packages/utility-features/test-utils/index.ts

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+export * from "./src/flush-promises";
+export * from "./src/get-promise-status";
+export * from "./src/use-fake-time";

packages/utility-features/test-utils/jest.config.js

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+module.exports =
+  require("@k8slens/jest").monorepoPackageConfig(__dirname).configForReact;

packages/utility-features/test-utils/package.json

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+{
+  "name": "@k8slens/test-utils",
+  "version": "1.0.0",
+  "description": "A collection of utilities for testing",
+  "type": "commonjs",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "publishConfig": {
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
+  },
+  "private": false,
+  "files": [
+    "dist"
+  ],
+  "author": {
+    "name": "OpenLens Authors",
+    "email": "info@k8slens.dev"
+  },
+  "license": "MIT",
+  "homepage": "https://github.com/lensapp/lens",
+  "scripts": {
+    "build": "webpack",
+    "dev": "webpack --mode=development --watch",
+    "test": "jest --coverage --runInBand"
+  }
+}

packages/utility-features/test-utils/src/flush-promises.ts

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+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import { setImmediate } from "timers";
+
+export const flushPromises = () => new Promise(setImmediate);

packages/utility-features/test-utils/src/get-promise-status.ts

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+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import { flushPromises } from "./flush-promises";
+
+export const getPromiseStatus = async (promise: Promise<unknown>) => {
+  const status = { fulfilled: false };
+
+  promise.finally(() => {
+    status.fulfilled = true;
+  });
+
+  await flushPromises();
+
+  return status;
+};

packages/utility-features/test-utils/src/use-fake-time.ts

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+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import { act } from "@testing-library/react";
+
+let usingFakeTime = false;
+
+export const advanceFakeTime = (milliseconds: number) => {
+  if (!usingFakeTime) {
+    throw new Error("Tried to advance fake time but it was not enabled. Call useFakeTime() first.");
+  }
+
+  act(() => {
+    jest.advanceTimersByTime(milliseconds);
+  });
+};
+
+export const testUsingFakeTime = (dateTime = "2015-10-21T07:28:00Z") => {
+  usingFakeTime = true;
+
+  jest.useFakeTimers();
+
+  jest.setSystemTime(new Date(dateTime));
+};

packages/utility-features/test-utils/tsconfig.json

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+{
+  "extends": "@k8slens/typescript/config/base.json"
+}

packages/utility-features/test-utils/webpack.config.js

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+module.exports = require("@k8slens/webpack").configForNode;