feat: support egg-bin test --changed

README.md

@@ -133,6 +133,7 @@ You can pass any mocha argv.
 - `--timeout` milliseconds, default to 30000
 - `--full-trace` display the full stack trace, default to false.
 - `--typescript` / `--ts` enable typescript support, default to `false`.
+- `--changed` / `-c` only test changed test files(test files means files that match `${pwd}/test/**/*.test.(js|ts)`)
 - see more at https://mochajs.org/#usage
 
 #### environment

lib/cmd/cov.js

@@ -84,7 +84,7 @@ class CovCommand extends Command {
     };
 
     // save coverage-xxxx.json to $PWD/coverage
-    const covArgs = this.getCovArgs(context);
+    const covArgs = yield this.getCovArgs(context);
     if (!covArgs) return;
     debug('covArgs: %j', covArgs);
     yield this.helper.forkNode(nycCli, covArgs, opt);
@@ -104,7 +104,7 @@ class CovCommand extends Command {
    * @return {Array} args for nyc
    * @protected
    */
-  getCovArgs(context) {
+  * getCovArgs(context) {
     let covArgs = [
       // '--show-process-tree',
     ];
@@ -128,7 +128,7 @@ class CovCommand extends Command {
       covArgs.push(exclude);
     }
     covArgs.push(require.resolve('mocha/bin/_mocha'));
-    const testArgs = this.formatTestArgs(context);
+    const testArgs = yield this.formatTestArgs(context);
     if (!testArgs) return;
     covArgs = covArgs.concat(testArgs);
     return covArgs;

lib/cmd/test.js

@@ -5,6 +5,7 @@ const fs = require('fs');
 const path = require('path');
 const globby = require('globby');
 const Command = require('../command');
+const changed = require('jest-changed-files');
 
 class TestCommand extends Command {
   constructor(rawArgv) {
@@ -29,6 +30,10 @@ class TestCommand extends Command {
       'full-trace': {
         description: 'display the full stack trace',
       },
+      changed: {
+        description: 'only test with changed files and match ${cwd}/test/**/*.test.(js|ts)',
+        alias: 'c',
+      },
     };
   }
 
@@ -44,7 +49,7 @@ class TestCommand extends Command {
       execArgv: context.execArgv,
     };
     const mochaFile = require.resolve('mocha/bin/_mocha');
-    const testArgs = this.formatTestArgs(context);
+    const testArgs = yield this.formatTestArgs(context);
     if (!testArgs) return;
     debug('run test: %s %s', mochaFile, testArgs.join(' '));
     yield this.helper.forkNode(mochaFile, testArgs, opt);
@@ -69,7 +74,7 @@ class TestCommand extends Command {
    * @return {Array} [ '--require=xxx', 'xx.test.js' ]
    * @protected
    */
-  formatTestArgs({ argv, debug }) {
+  * formatTestArgs({ argv, debug }) {
     const testArgv = Object.assign({}, argv);
 
     /* istanbul ignore next */
@@ -109,10 +114,27 @@ class TestCommand extends Command {
 
     testArgv.require = requireArr;
 
+    let pattern;
+    // changed
+    if (testArgv.changed) {
+      pattern = yield this._getChangedTestFiles();
+      if (!pattern.length) {
+        console.log('No changed test files');
+        return;
+      }
+    }
+
+    if (!pattern) {
+      // specific test files
+      pattern = testArgv._.slice();
+    }
+    if (!pattern.length && process.env.TESTS) {
+      pattern = process.env.TESTS.split(',');
+    }
+
     // collect test files
-    let pattern = testArgv._.slice();
     if (!pattern.length) {
-      pattern = [ process.env.TESTS || `test/**/*.test.${testArgv.typescript ? 'ts' : 'js'}` ];
+      pattern = [ `test/**/*.test.${testArgv.typescript ? 'ts' : 'js'}` ];
     }
     pattern = pattern.concat([ '!test/fixtures', '!test/node_modules' ]);
 
@@ -141,6 +163,20 @@ class TestCommand extends Command {
 
     return this.helper.unparseArgv(testArgv);
   }
+
+  * _getChangedTestFiles() {
+    const cwd = process.cwd();
+    const res = yield changed.getChangedFilesForRoots([ cwd ]);
+    const changedFiles = res.changedFiles;
+    const files = [];
+    for (const file of changedFiles) {
+      // only find ${cwd}/test/**/*.test.(js|ts)
+      if (file.startsWith(path.join(cwd, 'test')) && file.match(/\.test\.(js|ts)$/)) {
+        files.push(file);
+      }
+    }
+    return files;
+  }
 }
 
 module.exports = TestCommand;

package.json

@@ -19,12 +19,13 @@
     "globby": "^8.0.1",
     "inspector-proxy": "^1.2.1",
     "intelli-espower-loader": "^1.0.1",
-    "source-map-support": "^0.5.6",
+    "jest-changed-files": "^23.4.2",
     "mocha": "^5.2.0",
     "mz-modules": "^2.1.0",
     "nyc": "^13.0.1",
     "power-assert": "^1.6.0",
     "semver": "^5.5.0",
+    "source-map-support": "^0.5.6",
     "test-exclude": "^5.0.0",
     "ts-node": "^7.0.0",
     "ypkgfiles": "^1.6.0"

test/lib/cmd/test.test.js

@@ -5,6 +5,8 @@ const coffee = require('coffee');
 const mm = require('mm');
 const assert = require('assert');
 const semver = require('semver');
+const changed = require('jest-changed-files');
+const Command = require('../../../lib/cmd/test');
 
 describe('test/lib/cmd/test.test.js', () => {
   const eggBin = require.resolve('../../../bin/egg-bin.js');
@@ -45,6 +47,16 @@ describe('test/lib/cmd/test.test.js', () => {
       .end(done);
   });
 
+  it('should only test files specified by TESTS with multi pattern', done => {
+    mm(process.env, 'TESTS', 'test/a.test.js,test/b/b.test.js');
+    coffee.fork(eggBin, [ 'test' ], { cwd })
+      .expect('stdout', /should success/)
+      .expect('stdout', /a\.test\.js/)
+      .expect('stdout', /b\/b.test.js/)
+      .expect('code', 0)
+      .end(done);
+  });
+
   it('should only test files specified by TESTS argv', done => {
     mm(process.env, 'TESTS', 'test/**/*.test.js');
     coffee.fork(eggBin, [ 'test', 'test/a.test.js' ], { cwd })
@@ -189,4 +201,34 @@ describe('test/lib/cmd/test.test.js', () => {
         });
     });
   });
+
+  // changed need to mock getChangedFilesForRoots, so we just test formatTestArgs directly
+  describe('changed', () => {
+    it('should return undefined if no test file changed', function* () {
+      const cmd = new Command([ '--changed' ]);
+      mm.data(changed, 'getChangedFilesForRoots', {
+        changedFiles: new Set(),
+      });
+      const args = yield cmd.formatTestArgs(cmd.context);
+      assert(!args);
+    });
+
+    it('should return file changed', function* () {
+      const cmd = new Command([ '--changed' ]);
+      mm.data(changed, 'getChangedFilesForRoots', {
+        changedFiles: new Set([ __filename ]),
+      });
+      const args = yield cmd.formatTestArgs(cmd.context);
+      assert(args.includes('--changed', __filename));
+    });
+
+    it('should filter not test file', function* () {
+      const cmd = new Command([ '--changed' ]);
+      mm.data(changed, 'getChangedFilesForRoots', {
+        changedFiles: new Set([ __filename + '.tmp', 'abc.test.js' ]),
+      });
+      const args = yield cmd.formatTestArgs(cmd.context);
+      assert(!args);
+    });
+  });
 });