Fix unhandled error when a bad revision is provided to changedSince

CHANGELOG.md

@@ -29,6 +29,7 @@
 - `[jest-jasmine2]` Fail synchronous test timeouts ([#7074](https://github.com/facebook/jest/pull/7074))
 - `[jest-jasmine2]` Better error message when a describe block is empty ([#6372](https://github.com/facebook/jest/pull/6372))
 - `[jest-circus]` Better error message when a describe block is empty ([#6372](https://github.com/facebook/jest/pull/6372))
+- `[jest-cli]` Fix unhandled error when a bad revision is provided to `changedSince` ([#7112](https://github.com/facebook/jest/pull/7112))
 
 ### Chore & Maintenance
 

e2e/__tests__/__snapshots__/jest_changed_files.test.js.snap

@@ -0,0 +1,21 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`handles a bad revision for "changedSince", for git 1`] = `
+"
+
+  ● Test suite failed to run
+
+    fatal: bad revision '^blablabla'
+
+"
+`;
+
+exports[`handles a bad revision for "changedSince", for hg 1`] = `
+"
+
+  ● Test suite failed to run
+
+    abort: unknown revision 'blablabla'!
+
+"
+`;

e2e/__tests__/jest_changed_files.test.js

@@ -17,6 +17,7 @@ import {
 } from '../../packages/jest-changed-files/src';
 import {skipSuiteOnWindows} from '../../scripts/ConditionalTest';
 import {cleanup, run, writeFiles} from '../Utils';
+import runJest from '../runJest';
 
 skipSuiteOnWindows();
 
@@ -243,6 +244,24 @@ test('monitors only root paths for git', async () => {
   ).toEqual(['file2.txt', 'file3.txt']);
 });
 
+test('handles a bad revision for "changedSince", for git', async () => {
+  writeFiles(DIR, {
+    '.watchmanconfig': '',
+    '__tests__/file1.test.js': `require('../file1'); test('file1', () => {});`,
+    'file1.js': 'module.exports = {}',
+    'package.json': '{}',
+  });
+
+  run(`${GIT} init`, DIR);
+  run(`${GIT} add .`, DIR);
+  run(`${GIT} commit --no-gpg-sign -m "first"`, DIR);
+
+  const {status, stderr} = runJest(DIR, ['--changedSince=blablabla']);
+
+  expect(status).toBe(1);
+  expect(stderr).toMatchSnapshot();
+});
+
 test('gets changed files for hg', async () => {
   if (process.env.CI) {
     // Circle and Travis have very old version of hg (v2, and current
@@ -371,3 +390,21 @@ test('monitors only root paths for hg', async () => {
       .sort(),
   ).toEqual(['file2.txt', 'file3.txt']);
 });
+
+test('handles a bad revision for "changedSince", for hg', async () => {
+  writeFiles(DIR, {
+    '.watchmanconfig': '',
+    '__tests__/file1.test.js': `require('../file1'); test('file1', () => {});`,
+    'file1.js': 'module.exports = {}',
+    'package.json': '{}',
+  });
+
+  run(`${HG} init`, DIR);
+  run(`${HG} add .`, DIR);
+  run(`${HG} commit -m "first"`, DIR);
+
+  const {status, stderr} = runJest(DIR, ['--changedSince=blablabla']);
+
+  expect(status).toBe(1);
+  expect(stderr).toMatchSnapshot();
+});

packages/jest-cli/src/getChangedFilesPromise.js

@@ -10,6 +10,8 @@
 import type {GlobalConfig, ProjectConfig} from 'types/Config';
 import type {ChangedFilesPromise} from 'types/ChangedFiles';
 import {getChangedFilesForRoots} from 'jest-changed-files';
+import {formatExecError} from 'jest-message-util';
+import chalk from 'chalk';
 
 export default (
   globalConfig: GlobalConfig,
@@ -24,6 +26,18 @@ export default (
       changedSince: globalConfig.changedSince,
       lastCommit: globalConfig.lastCommit,
       withAncestor: globalConfig.changedFilesWithAncestor,
+    }).catch(e => {
+      const message = formatExecError(e, configs[0], {noStackTrace: true})
+        .split('\n')
+        .filter(line => !line || !line.includes('Command failed:'))
+        .join('\n');
+
+      console.error(chalk.red(`\n\n${message}`));
+
+      process.exit(1);
+
+      // We do process.exit, so this is dead code
+      return Promise.reject(e);
     });
   }