chore: add some mocks test

Author: phunguyenmurcul

__tests__/main.test.ts

@@ -0,0 +1,15 @@
+import { useDefault } from '../src/main.js';
+
+jest.mock('../src/mock.js', () => ({
+  default: {
+    methodBar: () => 'foo',
+    methodFoo: () => 'bar',
+  },
+}));
+
+describe('mock-default', () => {
+  it('should use mock value', () => {
+    expect(useDefault().methodBar()).toBe('foo');
+    expect(useDefault().methodFoo()).toBe('bar');
+  });
+});

__tests__/mock-default.test.ts

@@ -0,0 +1,13 @@
+import { useMethodFoo, useMethodBar } from '../src/main.js';
+
+jest.mock('../src/mock.js', () => ({
+  methodBar: () => 'foo',
+  methodFoo: () => 'bar',
+}));
+
+describe('mock-exports', () => {
+  it('should use mock value', () => {
+    expect(useMethodFoo()).toBe('bar');
+    expect(useMethodBar()).toBe('foo');
+  });
+});

__tests__/mock-exports.test.ts

@@ -2,7 +2,7 @@ export default {
   testEnvironment: 'node',
   preset: 'ts-jest/presets/default-esm',
   transform: {
-    '^.+\\.m?[tj]s?$': ['ts-jest', { useESM: true }],
+    '^.+\\.m?[tj]s?$': ['ts-jest'],
   },
   moduleNameMapper: {
     '^(\\.{1,2}/.*)\\.(m)?js$': '$1',

jest.config.js

@@ -1,34 +1,13 @@
-/**
- * Some predefined delay values (in milliseconds).
- */
-export enum Delays {
-  Short = 500,
-  Medium = 2000,
-  Long = 5000,
-}
+import mock, { methodBar, methodFoo } from './mock.js';
 
-/**
- * Returns a Promise<string> that resolves after a given time.
- *
- * @param {string} name - A name.
- * @param {number=} [delay=Delays.Medium] - A number of milliseconds to delay resolution of the Promise.
- * @returns {Promise<string>}
- */
-function delayedHello(
-  name: string,
-  delay: number = Delays.Medium,
-): Promise<string> {
-  return new Promise((resolve: (value?: string) => void) =>
-    setTimeout(() => resolve(`Hello, ${name}`), delay),
-  );
-}
+export const useDefault = (): any => {
+  return mock;
+};
 
-// Please see the comment in the .eslintrc.json file about the suppressed rule!
-// Below is an example of how to use ESLint errors suppression. You can read more
-// at https://eslint.org/docs/latest/user-guide/configuring/rules#disabling-rules
+export const useMethodBar = (): unknown => {
+  return methodBar();
+};
 
-// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
-export async function greeter(name: any) { // eslint-disable-line @typescript-eslint/no-explicit-any
-  // The name parameter should be of type string. Any is used only to trigger the rule.
-  return await delayedHello(name, Delays.Long);
-}
+export const useMethodFoo = (): unknown => {
+  return methodFoo();
+};

src/main.ts

@@ -0,0 +1,11 @@
+export const methodFoo = (): string => {
+  return 'foo';
+};
+
+export const methodBar = (): string => {
+  return 'bar';
+};
+
+const methods = { methodFoo, methodBar };
+
+export default methods;