Make listTests always print to console.log (#4391)

* Make listTests always print to console.log

* Update snapshot

* Update snapshot a second time

* Try to remove EOL splitting

* Re-add normalize paths

* Also update snapshot

* Split by \n instead of EOL

Author: jseminck

integration_tests/__tests__/__snapshots__/list_tests.test.js.snap

@@ -1,7 +1,8 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`--listTests flag causes tests to be printed in different lines 1`] = `
-"/MOCK_ABOLUTE_PATH/integration_tests/list_tests/__tests__/dummy.test.js
+"
+/MOCK_ABOLUTE_PATH/integration_tests/list_tests/__tests__/dummy.test.js
 /MOCK_ABOLUTE_PATH/integration_tests/list_tests/__tests__/other.test.js"
 `;
 

integration_tests/__tests__/list_tests.test.js

@@ -11,7 +11,6 @@
 
 const runJest = require('../runJest');
 const path = require('path');
-const {EOL} = require('os');
 
 const testRootDir = path.resolve(__dirname, '..', '..');
 
@@ -28,17 +27,17 @@ describe('--listTests flag', () => {
 
     expect(status).toBe(0);
     expect(
-      normalizePaths(stdout).split(EOL).sort().join(EOL),
+      normalizePaths(stdout).split('\n').sort().join('\n'),
     ).toMatchSnapshot();
   });
 
   it('causes tests to be printed out as JSON when using the --json flag', () => {
-    const {status, stderr} = runJest('list_tests', ['--listTests', '--json']);
+    const {status, stdout} = runJest('list_tests', ['--listTests', '--json']);
 
     expect(status).toBe(0);
-    expect(() => JSON.parse(stderr)).not.toThrow();
+    expect(() => JSON.parse(stdout)).not.toThrow();
     expect(
-      JSON.stringify(JSON.parse(stderr).map(normalizePaths).sort()),
+      JSON.stringify(JSON.parse(stdout).map(normalizePaths).sort()),
     ).toMatchSnapshot();
   });
 });

packages/jest-cli/src/run_jest.js

@@ -116,9 +116,9 @@ const runJest = async ({
   if (globalConfig.listTests) {
     const testsPaths = allTests.map(test => test.path);
     if (globalConfig.json) {
-      outputStream.write(JSON.stringify(testsPaths));
+      console.log(JSON.stringify(testsPaths));
     } else {
-      outputStream.write(testsPaths.join('\n'));
+      console.log(testsPaths.join('\n'));
     }
 
     onComplete && onComplete(makeEmptyAggregatedTestResult());