Catch ESLint lintFiles errors (fixes #96)

integrationTests/__fixtures__/rule-error/.eslintrc.js

@@ -0,0 +1,12 @@
+const path = require('path');
+const rulesDirPlugin = require('eslint-plugin-rulesdir');
+
+rulesDirPlugin.RULES_DIR = path.join(__dirname, 'rules');
+
+module.exports = {
+  plugins: ['rulesdir'],
+  rules: {
+    quotes: ['error', 'double'],
+    'rulesdir/intentional-error': ['error'],
+  },
+};

integrationTests/__fixtures__/rule-error/__eslint__/one.js

@@ -0,0 +1 @@
+console.log('one');

integrationTests/__fixtures__/rule-error/__eslint__/two.js

@@ -0,0 +1 @@
+console.log('two');

integrationTests/__fixtures__/rule-error/jest.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+  runner: '../../../',
+  testMatch: ['**/__eslint__/**/*.js'],
+};

integrationTests/__fixtures__/rule-error/rules/intentional-error.js

@@ -0,0 +1,17 @@
+// Intentional create an error from eslint
+module.exports = {
+  meta: {
+    docs: {
+      description: 'Cause an intentional error at rule evalutation time',
+    },
+    schema: [],
+  },
+  create(context) {
+    return {
+      Identifier(node) {
+        const obj = {};
+        obj.will.cause.an.error.here;
+      },
+    };
+  },
+};

integrationTests/__snapshots__/rule-error.test.js.snap

@@ -0,0 +1,16 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Correctly prints the error message from a failing ESLint rule 1`] = `
+"FAIL integrationTests/__fixtures__/rule-error/__eslint__/one.js
+Cannot read property 'cause' of undefined
+Occurred while linting /mocked-path-to-jest-runner-mocha/integrationTests/__fixtures__/rule-error/__eslint__/one.js:1
+FAIL integrationTests/__fixtures__/rule-error/__eslint__/two.js
+Cannot read property 'cause' of undefined
+Occurred while linting /mocked-path-to-jest-runner-mocha/integrationTests/__fixtures__/rule-error/__eslint__/two.js:1
+Test Suites: 2 failed, 2 total
+Tests:       2 failed, 2 total
+Snapshots:   0 total
+Time:
+Ran all test suites.
+"
+`;

integrationTests/rule-error.test.js

@@ -0,0 +1,5 @@
+const runJest = require('./runJest');
+
+it('Correctly prints the error message from a failing ESLint rule', async () => {
+  expect(await runJest('rule-error')).toMatchSnapshot();
+});

package.json

@@ -41,6 +41,7 @@
     "eslint-plugin-import": "^2.22.0",
     "eslint-plugin-jest": "^26.9.0",
     "eslint-plugin-prettier": "^4.0.0",
+    "eslint-plugin-rulesdir": "^0.2.1",
     "execa": "^5.1.1",
     "jest": "^27 || ^28 || ^29",
     "jest-watch-select-projects": "^2.0.0",

src/runner/runESLint.js

@@ -226,7 +226,20 @@ const runESLint = async ({ testPath, config, extraOptions }) => {
     });
   }
 
-  const report = await lintFiles([testPath]);
+  let report;
+  try {
+    report = await lintFiles([testPath]);
+  } catch (e) {
+    return fail({
+      start,
+      end: Date.now(),
+      test: {
+        path: testPath,
+        title: 'ESLint execution error',
+        errorMessage: e.message,
+      },
+    });
+  }
 
   if (cliOptions.fix && !cliOptions.fixDryRun) {
     await ESLintConstructor.outputFixes(report);

yarn.lock

@@ -2254,6 +2254,11 @@ eslint-plugin-prettier@^4.0.0:
   dependencies:
     prettier-linter-helpers "^1.0.0"
 
+eslint-plugin-rulesdir@^0.2.1:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-rulesdir/-/eslint-plugin-rulesdir-0.2.2.tgz#84756ec39cd8503b1fe8af6a02a5da361e2bd076"
+  integrity sha512-qhBtmrWgehAIQeMDJ+Q+PnOz1DWUZMPeVrI0wE9NZtnpIMFUfh3aPKFYt2saeMSemZRrvUtjWfYwepsC8X+mjQ==
+
 eslint-scope@^5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-5.1.1.tgz#e786e59a66cb92b3f6c1fb0d508aab174848f48c"