feat: run related tests to a file

.vscode/launch.json

@@ -183,7 +183,7 @@
       "name": "jest testing",
       "program": "${workspaceFolder}/node_modules/.bin/jest",
       "cwd": "${workspaceFolder}/core/jest-testing",
-      "args": ["component"],
+      "args": ["react-link"],
       "console": "integratedTerminal",
       "internalConsoleOptions": "neverOpen",
       "disableOptimisticBPs": true,

core/jest-testing/src/index.ts

@@ -1 +1,2 @@
 export * from './run-tests';
+export * from './related-tests';

core/jest-testing/src/related-tests.ts

@@ -0,0 +1,45 @@
+import path from 'path';
+import { Config } from '@jest/types';
+import { sync as globSync } from 'glob';
+import { run, JestResults } from './run-tests';
+
+export type RelatedTest = {
+  /**
+   * full name of the test file
+   */
+  testFileName: string;
+} & JestResults;
+
+export type RelatedTests = RelatedTest[];
+
+export const runRelatedTests = async (
+  fileName: string,
+  jestConfig?: Partial<Config.Argv>,
+): Promise<RelatedTests> => {
+  const name = path.basename(fileName).split('.')[0];
+  const fileDir = path.dirname(fileName);
+  const globs = [
+    `${fileDir}${path.sep}${name}*.@(test|spec).@(j|t)s?(x)`,
+    `${fileDir}${path.sep}__tests__${path.sep}**${path.sep}*.@(j|t)s?(x)`,
+  ];
+  const testFiles = globs.reduce(
+    (acc: string[], match) => [...acc, ...globSync(match, { nocase: true })],
+    [],
+  );
+  const results: RelatedTests = await Promise.all(
+    testFiles.map(async testFile => {
+      const rootDir = path.relative(
+        path.resolve(path.dirname(testFile), 'config'),
+        fileDir,
+      );
+      const result = await run(testFile, { rootDir, ...jestConfig });
+
+      return {
+        testFileName: path.relative(fileDir, testFile),
+        ...result,
+      } as RelatedTest;
+    }),
+  );
+
+  return results;
+};

core/jest-testing/src/run-tests.ts

@@ -37,7 +37,7 @@ export const run = async (
     configFile,
     `module.exports = ${JSON.stringify(
       {
-        rootDir: '..',
+        rootDir: jestConfig?.rootDir || '..',
         preset: 'ts-jest',
         transform: {
           '^.+\\.(ts|tsx)?$': 'ts-jest',
@@ -46,7 +46,7 @@ export const run = async (
         collectCoverageFrom: [
           '**/*.{js,jsx,tsx,ts}',
           '!**/jest.config.js',
-          '!**/*.{test,spec}.{js,ts}',
+          '!**/*.{test,spec}.{js,jsx,tsx,ts}',
         ],
       },
       null,
@@ -62,7 +62,7 @@ export const run = async (
   try {
     runResults = await runCLI(
       {
-        $0: testFile,
+        testRegex: testFile,
         silent: true,
         verbose: false,
         reporters: [],
@@ -81,6 +81,9 @@ export const run = async (
     fs.rmdirSync(configFolder, { recursive: true });
   }
   const cov = runResults.results.coverageMap;
+  if (runResults.results.testResults.length !== 1) {
+    throw `More than one test results returned ${runResults.results.testResults.length}`;
+  }
   const result: JestResults = {
     testResults: runResults.results.testResults[0].testResults,
     coverage: {},

core/jest-testing/test/fixtures/component/__tests__/some_more_tests.js

@@ -0,0 +1,20 @@
+import React from 'react';
+import renderer from 'react-test-renderer';
+import Link from '../Link.react';
+
+test('tests in __tests__ folder', () => {
+  const component = renderer.create(
+    <Link page="http://www.google.com">Google</Link>,
+  );
+  let tree = component.toJSON();
+  expect(tree).toMatchInlineSnapshot(`
+<a
+  className="normal"
+  href="http://www.google.com"
+  onMouseEnter={[Function]}
+  onMouseLeave={[Function]}
+>
+  Google
+</a>
+`);
+});

core/jest-testing/test/fixtures/component/link.react.controls.test.js

@@ -0,0 +1,20 @@
+import React from 'react';
+import renderer from 'react-test-renderer';
+import Link from './Link.react';
+
+test('tests in same folder', () => {
+  const component = renderer.create(
+    <Link page="http://www.google.com">Google</Link>,
+  );
+  let tree = component.toJSON();
+  expect(tree).toMatchInlineSnapshot(`
+<a
+  className="normal"
+  href="http://www.google.com"
+  onMouseEnter={[Function]}
+  onMouseLeave={[Function]}
+>
+  Google
+</a>
+`);
+});

core/jest-testing/test/fixtures/simple/__jest-tmp-1/jest.config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  "rootDir": "..",
+  "preset": "ts-jest",
+  "transform": {
+    "^.+\\.(ts|tsx)?$": "ts-jest",
+    "^.+\\.(js|jsx)$": "babel-jest"
+  },
+  "collectCoverageFrom": [
+    "**/*.{js,jsx,tsx,ts}",
+    "!**/jest.config.js",
+    "!**/*.{test,spec}.{js,ts}"
+  ]
+}
+

core/jest-testing/test/fixtures/simple/__jest-tmp-3/jest.config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  "rootDir": "..",
+  "preset": "ts-jest",
+  "transform": {
+    "^.+\\.(ts|tsx)?$": "ts-jest",
+    "^.+\\.(js|jsx)$": "babel-jest"
+  },
+  "collectCoverageFrom": [
+    "**/*.{js,jsx,tsx,ts}",
+    "!**/jest.config.js",
+    "!**/*.{test,spec}.{js,ts}"
+  ]
+}
+

core/jest-testing/test/tests/run-related/react-link.test.ts

@@ -0,0 +1,29 @@
+import path from 'path';
+import { runRelatedTests } from '../../../src';
+
+type Await<T> = T extends PromiseLike<infer U> ? U : T;
+
+let results: Await<ReturnType<typeof runRelatedTests>>;
+beforeAll(async () => {
+  results = await runRelatedTests(
+    path.resolve(__dirname, '../../fixtures/component/Link.react.js'),
+  );
+}, 100000);
+
+describe('react link related tests', () => {
+  it('testResults ', () => {
+    const files = results.map(({ testFileName }) => testFileName);
+    expect(files).toMatchObject([
+      'link.react.controls.test.js',
+      'Link.react.test.js',
+      '__tests__/some_more_tests.js',
+    ]);
+  });
+
+  it('sub-folder coverage ', () => {
+    const result = results.find(
+      ({ testFileName }) => testFileName === '__tests__/some_more_tests.js',
+    );
+    expect(result?.coverage).toMatchObject({});
+  });
+});

core/jest-testing/test/tests/react-component.test.ts → core/jest-testing/test/tests/run/react-component.test.ts

@@ -1,12 +1,12 @@
 import path from 'path';
-import { run } from '../../src';
+import { run } from '../../../src';
 
 type Await<T> = T extends PromiseLike<infer U> ? U : T;
 
 let results: Await<ReturnType<typeof run>>;
 beforeAll(async () => {
   results = await run(
-    path.resolve(__dirname, '../fixtures/component/Link.react.test.js'),
+    path.resolve(__dirname, '../../fixtures/component/Link.react.test.js'),
   );
 }, 50000);
 

core/jest-testing/test/tests/small.test.ts → core/jest-testing/test/tests/run/small.test.ts

@@ -1,12 +1,12 @@
 import path from 'path';
-import { run } from '../../src';
+import { run } from '../../../src';
 
 type Await<T> = T extends PromiseLike<infer U> ? U : T;
 
 let results: Await<ReturnType<typeof run>>;
 beforeAll(async () => {
   results = await run(
-    path.resolve(__dirname, '../fixtures/simple/sum.test.js'),
+    path.resolve(__dirname, '../../fixtures/simple/sum.test.js'),
   );
 }, 50000);