WIP: --changedFilesSinceCommit=origin/master + hg support

Author: alsuren

docs/CLI.md

@@ -102,6 +102,12 @@ two times slower._
 If you want to inspect the cache, use `--showConfig` and look at the
 `cacheDirectory` value. If you need to clear the cache, use `--clearCache`.
 
+### `--changedFilesSinceCommit`
+
+When used together with `--onlyChanged` or `--watch`, it runs tests related the
+changes since the provided revision. If the current branch is not a child of the
+given commit, then only changes made locally will be tested.
+
 ### `--changedFilesWithAncestor`
 
 When used together with `--onlyChanged` or `--watch`, it runs tests related to

integration_tests/__tests__/jest_changed_files.test.js

@@ -204,6 +204,23 @@ test('gets changed files for git', async () => {
       .map(filePath => path.basename(filePath))
       .sort(),
   ).toEqual(['file1.txt', 'file4.txt']);
+
+  run(`${GIT} checkout HEAD^^ -b feature-branch`, DIR);
+
+  writeFiles(DIR, {
+    'file5.txt': 'file5',
+  });
+  run(`${GIT} commit -am "test5"`, DIR);
+
+  ({changedFiles: files} = await getChangedFilesForRoots(roots, {
+    sinceCommit: 'master',
+  }));
+  // Returns files from this branch but not ones that only exist on master
+  expect(
+    Array.from(files)
+      .map(filePath => path.basename(filePath))
+      .sort(),
+  ).toEqual(['file5.txt']);
 });
 
 test('gets changed files for hg', async () => {
@@ -274,4 +291,35 @@ test('gets changed files for hg', async () => {
       .map(filePath => path.basename(filePath))
       .sort(),
   ).toEqual(['file1.txt', 'file4.txt']);
+
+  run(`${HG} commit -m "test3"`, DIR);
+
+  ({changedFiles: files} = await getChangedFilesForRoots(roots, {
+    sinceCommit: '-2',
+  }));
+  // Returns files from the last 2 commits
+  expect(
+    Array.from(files)
+      .map(filePath => path.basename(filePath))
+      .sort(),
+  ).toEqual(['file1.txt', 'file4.txt']);
+
+  run(`${HG} bookmark master`, DIR);
+  // Back up and develop on a different branch
+  run(`${HG} checkout --rev=-2`, DIR);
+
+  writeFiles(DIR, {
+    'file5.txt': 'file5',
+  });
+  run(`${HG} commit -am "test5"`, DIR);
+
+  ({changedFiles: files} = await getChangedFilesForRoots(roots, {
+    sinceCommit: 'master',
+  }));
+  // Returns files from this branch but not ones that only exist on master
+  expect(
+    Array.from(files)
+      .map(filePath => path.basename(filePath))
+      .sort(),
+  ).toEqual(['file5.txt']);
 });

packages/jest-changed-files/src/git.js

@@ -57,15 +57,19 @@ const adapter: SCMAdapter = {
         cwd,
       );
     } else if (sinceCommit) {
-      const changed = await findChangedFilesUsingCommand(
-        ['diff', '--name-only', '--diff-filter=ACMR', sinceCommit],
+      const committed = await findChangedFilesUsingCommand(
+        ['log', '--name-only', '--pretty=%b', 'HEAD', `^${sinceCommit}`],
         cwd,
       );
-      const untracked = await findChangedFilesUsingCommand(
-        ['ls-files', '--other', '--exclude-standard'],
+      const staged = await findChangedFilesUsingCommand(
+        ['diff', '--cached', '--name-only'],
         cwd,
       );
-      return changed.concat(untracked);
+      const unstaged = await findChangedFilesUsingCommand(
+        ['ls-files', '--other', '--modified', '--exclude-standard'],
+        cwd,
+      );
+      return [...committed, ...staged, ...unstaged];
     } else {
       return await findChangedFilesUsingCommand(
         ['ls-files', '--other', '--modified', '--exclude-standard'],

packages/jest-changed-files/src/hg.js

@@ -23,14 +23,11 @@ const adapter: SCMAdapter = {
     options: Options,
   ): Promise<Array<Path>> => {
     return new Promise((resolve, reject) => {
-      if (options && options.sinceCommit) {
-        throw new Error(
-          '`changedFilesSinceCommit` is not supported in hg repos.',
-        );
-      }
       let args = ['status', '-amnu'];
       if (options && options.withAncestor) {
         args.push('--rev', 'ancestor(.^)');
+      } else if (options && options.sinceCommit) {
+        args.push(`--rev', 'ancestor(., ${options.sinceCommit})`);
       } else if (options && options.lastCommit === true) {
         args = ['tip', '--template', '{files%"{file}\n"}'];
       }

packages/jest-cli/src/cli/args.js

@@ -105,7 +105,9 @@ export const options = {
   changedFilesSinceCommit: {
     description:
       'When used together with `--onlyChanged` or `--watch`, it runs tests ' +
-      'related the changes since the provided revision.',
+      'related the changes since the provided revision. If the current ' +
+      'branch is not a child of the given commit, then only changes made ' +
+      'locally will be tested.',
     type: 'string',
   },
   changedFilesWithAncestor: {