Watch plugin for toggling --fix

README.md

@@ -144,6 +144,26 @@ module.exports = {
 yarn jest
 ```
 
+## Toggle `--fix` in watch mode
+
+`jest-eslint-runner` comes with a watch plugin that allows you to toggle the `--fix` value while in watch mode without having to update your configuration.
+
+![fix](https://user-images.githubusercontent.com/574806/46181271-93205080-c279-11e8-8d73-b4c5e11086c4.gif)
+
+To use this watch plugin simply add this to your Jest configuration.
+
+```js
+{
+  watchPlugins: ['jest-runner-eslint/watch-fix'],
+}
+```
+
+After this run Jest in watch mode and you will see the following line in your watch usage menu
+
+```
+ › Press F to override ESLint --fix.
+```
+
 ## Options
 
 This project uses [cosmiconfig](https://github.com/davidtheclark/cosmiconfig), so you can provide config via:

jest.config.js

@@ -3,6 +3,7 @@ module.exports = {
     'jest-watch-typeahead/filename',
     'jest-watch-typeahead/testname',
     'jest-watch-select-projects',
+    './watch-fix',
   ],
   projects: [
     {

package.json

@@ -1,7 +1,7 @@
 {
   "name": "jest-runner-eslint",
   "version": "0.6.0",
-  "main": "build/index.js",
+  "main": "build/runner",
   "author": "Rogelio Guzman <[email protected]>",
   "description": "An experimental ESLint runner for Jest",
   "license": "MIT",
@@ -23,6 +23,7 @@
     "format": "prettier --write \"**/*.js\""
   },
   "dependencies": {
+    "chalk": "^2.4.1",
     "cosmiconfig": "^5.0.0",
     "create-jest-runner": "^0.4.1",
     "eslint": "^5.6.0",

src/__tests__/runESLint.test.js → src/runner/__tests__/runESLint.test.js

@@ -3,7 +3,7 @@ const path = require('path');
 
 const runESLintRunnerWithMockedEngine = options => {
   jest.resetModules();
-  jest.doMock('../utils/getLocalESLint', () => () => {
+  jest.doMock('../../utils/getLocalESLint', () => () => {
     return {
       CLIEngine: class {
         isPathIgnored(file) {
@@ -24,7 +24,7 @@ const runESLintRunnerWithMockedEngine = options => {
   });
   const runESLint = require('../runESLint');
 
-  return runESLint(options.runESLint);
+  return runESLint({ extraOptions: {}, ...options.runESLint });
 };
 
 it('Requires the config setupTestFrameworkScriptFile when specified', () => {

src/runner/index.js

@@ -0,0 +1,8 @@
+const { createJestRunner } = require('create-jest-runner');
+const configOverrides = require('../utils/configOverrides');
+
+const runner = createJestRunner(require.resolve('./runESLint'), {
+  getExtraOptions: () => ({ fix: configOverrides.getFix() }),
+});
+
+module.exports = runner;

src/runESLint.js → src/runner/runESLint.js

@@ -1,6 +1,6 @@
 const { pass, fail, skip } = require('create-jest-runner');
-const getLocalESLint = require('./utils/getLocalESLint');
-const getESLintOptions = require('./utils/getESLintOptions');
+const getLocalESLint = require('../utils/getLocalESLint');
+const getESLintOptions = require('../utils/getESLintOptions');
 
 const getComputedFixValue = ({ fix, quiet, fixDryRun }) => {
   if (fix || fixDryRun) {
@@ -9,7 +9,7 @@ const getComputedFixValue = ({ fix, quiet, fixDryRun }) => {
   return undefined;
 };
 
-const runESLint = ({ testPath, config }) => {
+const runESLint = ({ testPath, config, extraOptions }) => {
   const start = Date.now();
 
   if (config.setupTestFrameworkScriptFile) {
@@ -18,12 +18,14 @@ const runESLint = ({ testPath, config }) => {
   }
 
   const { CLIEngine } = getLocalESLint(config);
-  const { cliOptions } = getESLintOptions(config);
-  const cli = new CLIEngine(
-    Object.assign({}, cliOptions, {
-      fix: getComputedFixValue(cliOptions),
-    }),
-  );
+  const { cliOptions: baseCliOptions } = getESLintOptions(config);
+  const cliOptions = {
+    ...baseCliOptions,
+    fix: getComputedFixValue(baseCliOptions),
+    ...extraOptions,
+  };
+
+  const cli = new CLIEngine(cliOptions);
 
   if (cli.isPathIgnored(testPath)) {
     const end = Date.now();

src/utils/configOverrides.js

@@ -0,0 +1,13 @@
+class ConfigOverrides {
+  setFix(fix) {
+    this.fix = fix;
+  }
+
+  getFix() {
+    return this.fix;
+  }
+}
+
+const configOverrides = new ConfigOverrides();
+
+module.exports = configOverrides;

src/watchFixPlugin/__tests__/index.test.js

@@ -0,0 +1,66 @@
+/* eslint-disable global-require */
+const chalk = require('chalk');
+
+jest.doMock('chalk', () => new chalk.constructor({ enabled: false }));
+
+jest.useFakeTimers();
+
+let WatchFixPlugin;
+let configOverrides;
+
+describe('watchFixPlugin', () => {
+  beforeEach(() => {
+    jest.resetModules();
+    configOverrides = require('../../utils/configOverrides');
+    WatchFixPlugin = require('../');
+  });
+
+  it('shows the correct prompt', async () => {
+    const stdout = { write: jest.fn() };
+    const config = {};
+    const plugin = new WatchFixPlugin({ stdout, config });
+    expect(plugin.getUsageInfo()).toEqual({
+      key: 'F',
+      prompt: 'override ESLint --fix',
+    });
+
+    await plugin.run(plugin);
+
+    expect(plugin.getUsageInfo()).toEqual({
+      key: 'F',
+      prompt: 'toggle ESLint --fix (enabled)',
+    });
+
+    await plugin.run(plugin);
+
+    expect(plugin.getUsageInfo()).toEqual({
+      key: 'F',
+      prompt: 'toggle ESLint --fix (disabled)',
+    });
+  });
+
+  it('overrides the setting in configOverrides after each invocation', async () => {
+    const stdout = { write: jest.fn() };
+    const config = {};
+    const plugin = new WatchFixPlugin({ stdout, config });
+    expect(configOverrides.getFix()).toBeUndefined();
+
+    await plugin.run(plugin);
+
+    expect(configOverrides.getFix()).toBe(true);
+
+    await plugin.run(plugin);
+
+    expect(configOverrides.getFix()).toBe(false);
+  });
+
+  it('can customize the key', () => {
+    const stdout = { write: jest.fn() };
+    const config = { key: 'z' };
+    const plugin = new WatchFixPlugin({ stdout, config });
+    expect(plugin.getUsageInfo()).toEqual({
+      key: 'z',
+      prompt: 'override ESLint --fix',
+    });
+  });
+});

src/watchFixPlugin/index.js

@@ -0,0 +1,36 @@
+const chalk = require('chalk');
+const configOverrides = require('../utils/configOverrides');
+
+class ESLintWatchFixPlugin {
+  constructor({ stdout, config }) {
+    this._stdout = stdout;
+    this._key = config.key || 'F';
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  async run() {
+    const fix = configOverrides.getFix();
+    configOverrides.setFix(!fix);
+    return true;
+  }
+
+  getUsageInfo() {
+    const getPrompt = () => {
+      const fix = configOverrides.getFix();
+      if (fix === undefined) {
+        return 'override ESLint --fix';
+      }
+      if (!fix) {
+        return `toggle ESLint --fix ${chalk.italic('(disabled)')}`;
+      }
+      return `toggle ESLint --fix ${chalk.italic('(enabled)')}`;
+    };
+
+    return {
+      key: this._key,
+      prompt: getPrompt(),
+    };
+  }
+}
+
+module.exports = ESLintWatchFixPlugin;

watch-fix.js

@@ -0,0 +1,3 @@
+const ESLintWatchFixPlugin = require('./build/watchFixPlugin');
+
+module.exports = ESLintWatchFixPlugin;