chore: avoid backticks without template in strings (#12328)

.eslintrc.js

@@ -155,6 +155,17 @@ module.exports = {
         'sort-keys': 'off',
       },
     },
+    // snapshots in examples plus inline snapshots need to keep backtick
+    {
+      files: ['*.md', 'e2e/custom-inline-snapshot-matchers/__tests__/*'],
+      rules: {
+        quotes: [
+          'error',
+          'single',
+          {allowTemplateLiterals: true, avoidEscape: true},
+        ],
+      },
+    },
     {
       files: ['website/**/*'],
       rules: {
@@ -469,7 +480,7 @@ module.exports = {
     quotes: [
       'error',
       'single',
-      {allowTemplateLiterals: true, avoidEscape: true},
+      {allowTemplateLiterals: false, avoidEscape: true},
     ],
     radix: 'warn',
     'require-jsdoc': 'off',

e2e/__tests__/customReporters.test.ts

@@ -138,7 +138,7 @@ describe('Custom Reporters Integration', () => {
 
   test('prints reporter errors', () => {
     writeFiles(DIR, {
-      '__tests__/test.test.js': `test('test', () => {});`,
+      '__tests__/test.test.js': "test('test', () => {});",
       'package.json': JSON.stringify({
         jest: {
           reporters: ['default', '<rootDir>/reporter.js'],
@@ -163,7 +163,7 @@ describe('Custom Reporters Integration', () => {
   onNodeVersions('>=12.17.0', () => {
     test('supports reporter written in ESM', () => {
       writeFiles(DIR, {
-        '__tests__/test.test.js': `test('test', () => {});`,
+        '__tests__/test.test.js': "test('test', () => {});",
         'package.json': JSON.stringify({
           jest: {
             reporters: ['default', '<rootDir>/reporter.mjs'],

e2e/__tests__/executeTestsOnceInMpr.ts

@@ -33,13 +33,13 @@ test('Tests are executed only once even in an MPR', () => {
 
   /* eslint-disable sort-keys */
   writeFiles(DIR, {
-    'foo/folder/my-test-bar.js': `test('bar', () => console.log('Bar!'));`,
+    'foo/folder/my-test-bar.js': "test('bar', () => console.log('Bar!'));",
     'foo/folder/package.json': JSON.stringify(childConfig, null, 2),
 
-    'foo/directory/my-test-baz.js': `test('baz', () => console.log('Baz!'));`,
+    'foo/directory/my-test-baz.js': "test('baz', () => console.log('Baz!'));",
     'foo/directory/package.json': JSON.stringify(childConfig, null, 2),
 
-    'foo/whatever/my-test-qux.js': `test('qux', () => console.log('Qux!'));`,
+    'foo/whatever/my-test-qux.js': "test('qux', () => console.log('Qux!'));",
     'foo/whatever/package.json': JSON.stringify(childConfig, null, 2),
 
     'package.json': JSON.stringify(config, null, 2),

e2e/__tests__/globalSetup.test.ts

@@ -57,7 +57,7 @@ test('globalSetup is triggered once before all test suites', () => {
   const setupPath = path.join(e2eDir, 'setup.js');
   const result = runWithJson(e2eDir, [
     `--globalSetup=${setupPath}`,
-    `--testPathPattern=__tests__`,
+    '--testPathPattern=__tests__',
   ]);
 
   expect(result.exitCode).toBe(0);
@@ -71,7 +71,7 @@ test('jest throws an error when globalSetup does not export a function', () => {
   const setupPath = path.resolve(__dirname, '../global-setup/invalidSetup.js');
   const {exitCode, stderr} = runJest(e2eDir, [
     `--globalSetup=${setupPath}`,
-    `--testPathPattern=__tests__`,
+    '--testPathPattern=__tests__',
   ]);
 
   expect(exitCode).toBe(1);
@@ -155,7 +155,7 @@ test('globalSetup throws with named export', () => {
 
   const {exitCode, stderr} = runJest(e2eDir, [
     `--globalSetup=${setupPath}`,
-    `--testPathPattern=__tests__`,
+    '--testPathPattern=__tests__',
   ]);
 
   expect(exitCode).toBe(1);
@@ -166,13 +166,13 @@ test('globalSetup throws with named export', () => {
 });
 
 test('should not transpile the transformer', () => {
-  const {exitCode} = runJest('global-setup-custom-transform', [`--no-cache`]);
+  const {exitCode} = runJest('global-setup-custom-transform', ['--no-cache']);
 
   expect(exitCode).toBe(0);
 });
 
 test('should transform node_modules if configured by transformIgnorePatterns', () => {
-  const {exitCode} = runJest('global-setup-node-modules', [`--no-cache`]);
+  const {exitCode} = runJest('global-setup-node-modules', ['--no-cache']);
 
   expect(exitCode).toBe(0);
 });
@@ -190,7 +190,7 @@ test('properly handle rejections', () => {
     `,
   });
 
-  const {exitCode, stderr} = runJest(rejectionDir, [`--no-cache`]);
+  const {exitCode, stderr} = runJest(rejectionDir, ['--no-cache']);
 
   expect(exitCode).toBe(1);
   expect(stderr).toContain('Error: Jest: Got error running globalSetup');
@@ -199,7 +199,7 @@ test('properly handle rejections', () => {
 
 onNodeVersions('>=12.17.0', () => {
   test('globalSetup works with ESM modules', () => {
-    const {exitCode} = runJest('global-setup-esm', [`--no-cache`], {
+    const {exitCode} = runJest('global-setup-esm', ['--no-cache'], {
       nodeOptions: '--experimental-vm-modules --no-warnings',
     });
 

e2e/__tests__/globalTeardown.test.ts

@@ -41,7 +41,7 @@ test('globalTeardown is triggered once after all test suites', () => {
   const teardownPath = path.resolve(e2eDir, 'teardown.js');
   const result = runWithJson('global-teardown', [
     `--globalTeardown=${teardownPath}`,
-    `--testPathPattern=__tests__`,
+    '--testPathPattern=__tests__',
   ]);
 
   expect(result.exitCode).toBe(0);
@@ -55,7 +55,7 @@ test('jest throws an error when globalTeardown does not export a function', () =
   const teardownPath = path.resolve(e2eDir, 'invalidTeardown.js');
   const {exitCode, stderr} = runJest(e2eDir, [
     `--globalTeardown=${teardownPath}`,
-    `--testPathPattern=__tests__`,
+    '--testPathPattern=__tests__',
   ]);
 
   expect(exitCode).toBe(1);
@@ -126,7 +126,7 @@ test('globalTeardown throws with named export', () => {
 
   const {exitCode, stderr} = runJest(e2eDir, [
     `--globalTeardown=${teardownPath}`,
-    `--testPathPattern=__tests__`,
+    '--testPathPattern=__tests__',
   ]);
 
   expect(exitCode).toBe(1);
@@ -138,7 +138,7 @@ test('globalTeardown throws with named export', () => {
 
 onNodeVersions('>=12.17.0', () => {
   test('globalTeardown works with ESM modules', () => {
-    const {exitCode} = runJest('global-teardown-esm', [`--no-cache`], {
+    const {exitCode} = runJest('global-teardown-esm', ['--no-cache'], {
       nodeOptions: '--experimental-vm-modules --no-warnings',
     });
 

e2e/__tests__/jest.config.js.test.ts

@@ -16,8 +16,8 @@ afterAll(() => cleanup(DIR));
 
 test('works with jest.config.js', () => {
   writeFiles(DIR, {
-    '__tests__/a-banana.js': `test('banana', () => expect(1).toBe(1));`,
-    'jest.config.js': `module.exports = {testRegex: '.*-banana.js'};`,
+    '__tests__/a-banana.js': "test('banana', () => expect(1).toBe(1));",
+    'jest.config.js': "module.exports = {testRegex: '.*-banana.js'};",
     'package.json': '{}',
   });
 
@@ -35,7 +35,7 @@ test('traverses directory tree up until it finds jest.config', () => {
     test('banana', () => expect(1).toBe(1));
     test('abc', () => console.log(slash(process.cwd())));
     `,
-    'jest.config.js': `module.exports = {testRegex: '.*-banana.js'};`,
+    'jest.config.js': "module.exports = {testRegex: '.*-banana.js'};",
     'package.json': '{}',
     'some/nested/directory/file.js': '// nothing special',
   });
@@ -57,8 +57,8 @@ test('traverses directory tree up until it finds jest.config', () => {
 
 test('invalid JS in jest.config.js', () => {
   writeFiles(DIR, {
-    '__tests__/a-banana.js': `test('banana', () => expect(1).toBe(1));`,
-    'jest.config.js': `module.exports = i'll break this file yo`,
+    '__tests__/a-banana.js': "test('banana', () => expect(1).toBe(1));",
+    'jest.config.js': "module.exports = i'll break this file yo",
     'package.json': '{}',
   });
 

e2e/__tests__/jest.config.ts.test.ts

@@ -16,8 +16,9 @@ afterAll(() => cleanup(DIR));
 
 test('works with jest.config.ts', () => {
   writeFiles(DIR, {
-    '__tests__/a-giraffe.js': `test('giraffe', () => expect(1).toBe(1));`,
-    'jest.config.ts': `export default {testEnvironment: 'jest-environment-node', testRegex: '.*-giraffe.js'};`,
+    '__tests__/a-giraffe.js': "test('giraffe', () => expect(1).toBe(1));",
+    'jest.config.ts':
+      "export default {testEnvironment: 'jest-environment-node', testRegex: '.*-giraffe.js'};",
     'package.json': '{}',
   });
 
@@ -30,8 +31,9 @@ test('works with jest.config.ts', () => {
 
 test('works with tsconfig.json', () => {
   writeFiles(DIR, {
-    '__tests__/a-giraffe.js': `test('giraffe', () => expect(1).toBe(1));`,
-    'jest.config.ts': `export default {testEnvironment: 'jest-environment-node', testRegex: '.*-giraffe.js'};`,
+    '__tests__/a-giraffe.js': "test('giraffe', () => expect(1).toBe(1));",
+    'jest.config.ts':
+      "export default {testEnvironment: 'jest-environment-node', testRegex: '.*-giraffe.js'};",
     'package.json': '{}',
     'tsconfig.json': '{ "compilerOptions": { "module": "esnext" } }',
   });
@@ -50,7 +52,8 @@ test('traverses directory tree up until it finds jest.config', () => {
     test('giraffe', () => expect(1).toBe(1));
     test('abc', () => console.log(slash(process.cwd())));
     `,
-    'jest.config.ts': `export default {testEnvironment: 'jest-environment-node', testRegex: '.*-giraffe.js'};`,
+    'jest.config.ts':
+      "export default {testEnvironment: 'jest-environment-node', testRegex: '.*-giraffe.js'};",
     'package.json': '{}',
     'some/nested/directory/file.js': '// nothing special',
   });
@@ -72,8 +75,8 @@ test('traverses directory tree up until it finds jest.config', () => {
 
 test('it does type check the config', () => {
   writeFiles(DIR, {
-    '__tests__/a-giraffe.js': `test('giraffe', () => expect(1).toBe(1));`,
-    'jest.config.ts': `export default { testTimeout: "10000" }`,
+    '__tests__/a-giraffe.js': "test('giraffe', () => expect(1).toBe(1));",
+    'jest.config.ts': 'export default { testTimeout: "10000" }',
     'package.json': '{}',
   });
 
@@ -84,8 +87,8 @@ test('it does type check the config', () => {
 
 test('invalid JS in jest.config.ts', () => {
   writeFiles(DIR, {
-    '__tests__/a-giraffe.js': `test('giraffe', () => expect(1).toBe(1));`,
-    'jest.config.ts': `export default i'll break this file yo`,
+    '__tests__/a-giraffe.js': "test('giraffe', () => expect(1).toBe(1));",
+    'jest.config.ts': "export default i'll break this file yo",
     'package.json': '{}',
   });
 

e2e/__tests__/jestChangedFiles.test.ts

@@ -341,7 +341,7 @@ it('does not find changes in files with no diff, for git', async () => {
 test('handles a bad revision for "changedSince", for git', async () => {
   writeFiles(DIR, {
     '.watchmanconfig': '',
-    '__tests__/file1.test.js': `require('../file1'); test('file1', () => {});`,
+    '__tests__/file1.test.js': "require('../file1'); test('file1', () => {});",
     'file1.js': 'module.exports = {}',
     'package.json': '{}',
   });
@@ -494,7 +494,7 @@ testIfHg('monitors only root paths for hg', async () => {
 testIfHg('handles a bad revision for "changedSince", for hg', async () => {
   writeFiles(DIR, {
     '.watchmanconfig': '',
-    '__tests__/file1.test.js': `require('../file1'); test('file1', () => {});`,
+    '__tests__/file1.test.js': "require('../file1'); test('file1', () => {});",
     'file1.js': 'module.exports = {}',
     'package.json': '{}',
   });

e2e/__tests__/jestEnvironmentJsdom.test.ts

@@ -17,8 +17,8 @@ afterAll(() => cleanup(DIR));
 
 test('check is not leaking memory', () => {
   writeFiles(DIR, {
-    '__tests__/a.test.js': `test('a', () => console.log('a'));`,
-    '__tests__/b.test.js': `test('b', () => console.log('b'));`,
+    '__tests__/a.test.js': "test('a', () => console.log('a'));",
+    '__tests__/b.test.js': "test('b', () => console.log('b'));",
     'package.json': JSON.stringify({jest: {testEnvironment: 'jsdom'}}),
   });
 

e2e/__tests__/jestRequireActual.test.ts

@@ -23,8 +23,8 @@ test('understands dependencies using jest.requireActual', () => {
 
       test('a', () => {});
     `,
-    '__tests__/b.test.js': `test('b', () => {});`,
-    'a.js': `module.exports = {}`,
+    '__tests__/b.test.js': "test('b', () => {});",
+    'a.js': 'module.exports = {}',
     'package.json': JSON.stringify({jest: {}}),
   });
 

e2e/__tests__/jestRequireMock.test.ts

@@ -23,8 +23,8 @@ test('understands dependencies using jest.requireMock', () => {
 
       test('a', () => {});
     `,
-    '__tests__/b.test.js': `test('b', () => {});`,
-    'a.js': `module.exports = {}`,
+    '__tests__/b.test.js': "test('b', () => {});",
+    'a.js': 'module.exports = {}',
     'package.json': JSON.stringify({jest: {}}),
   });
 

e2e/__tests__/logHeapUsage.test.ts

@@ -17,7 +17,7 @@ afterAll(() => cleanup(DIR));
 
 test('logs memory usage', () => {
   writeFiles(DIR, {
-    '__tests__/a-banana.js': `test('banana', () => expect(1).toBe(1));`,
+    '__tests__/a-banana.js': "test('banana', () => expect(1).toBe(1));",
     'package.json': JSON.stringify({jest: {testEnvironment: 'node'}}),
   });
 

e2e/__tests__/multiProjectRunner.test.ts

@@ -20,9 +20,9 @@ afterEach(() => cleanup(DIR));
 test("--listTests doesn't duplicate the test files", () => {
   writeFiles(DIR, {
     '.watchmanconfig': '',
-    '/project1.js': `module.exports = {rootDir: './', displayName: 'BACKEND'}`,
-    '/project2.js': `module.exports = {rootDir: './', displayName: 'BACKEND'}`,
-    '__tests__/inBothProjectsTest.js': `test('test', () => {});`,
+    '/project1.js': "module.exports = {rootDir: './', displayName: 'BACKEND'}",
+    '/project2.js': "module.exports = {rootDir: './', displayName: 'BACKEND'}",
+    '__tests__/inBothProjectsTest.js': "test('test', () => {});",
     'package.json': JSON.stringify({
       jest: {projects: ['<rootDir>/project1.js', '<rootDir>/project2.js']},
     }),
@@ -139,13 +139,13 @@ test('"No tests found" message for projects', () => {
       test('file1', () => {});
     `,
     'project1/file1.js': SAMPLE_FILE_CONTENT,
-    'project1/jest.config.js': `module.exports = {rootDir: './'}`,
+    'project1/jest.config.js': "module.exports = {rootDir: './'}",
     'project2/__tests__/file1.test.js': `
       const file1 = require('../file1');
       test('file1', () => {});
     `,
     'project2/file1.js': SAMPLE_FILE_CONTENT,
-    'project2/jest.config.js': `module.exports = {rootDir: './'}`,
+    'project2/jest.config.js': "module.exports = {rootDir: './'}",
   });
   const {stdout: verboseOutput} = runJest(DIR, [
     '--no-watchman',
@@ -352,9 +352,11 @@ test('resolves projects and their <rootDir> properly', () => {
       setupFiles: ['<rootDir>/project1_setup.js'],
       testEnvironment: 'node',
     }),
-    'project1/__tests__/test.test.js': `test('project1', () => expect(global.project1).toBe(true))`,
+    'project1/__tests__/test.test.js':
+      "test('project1', () => expect(global.project1).toBe(true))",
     'project1/project1_setup.js': 'global.project1 = true;',
-    'project2/__tests__/test.test.js': `test('project2', () => expect(global.project2).toBe(true))`,
+    'project2/__tests__/test.test.js':
+      "test('project2', () => expect(global.project2).toBe(true))",
     'project2/project2.conf.json': JSON.stringify({
       name: 'project2',
       rootDir: '../', // root dir is set to the top level
@@ -427,7 +429,7 @@ test('resolves projects and their <rootDir> properly', () => {
 
   ({stderr} = runJest(DIR, ['--no-watchman']));
   expect(stderr).toMatch(
-    `Can't find a root directory while resolving a config file path.`,
+    "Can't find a root directory while resolving a config file path.",
   );
   expect(stderr).toMatch(/banana/);
 });