Fix add getYarnVersion missing tests

Author: cryptodev-2s

src/yarn-commands.test.ts

@@ -1,32 +1,61 @@
-import { fixConstraints, installDependencies } from './yarn-commands.js';
-import { runCommand } from './misc-utils.js';
+import { when } from 'jest-when';
+import {
+  fixConstraints,
+  getYarnVersion,
+  installDependencies,
+} from './yarn-commands.js';
+import * as miscUtils from './misc-utils.js';
 
 jest.mock('./misc-utils');
 
 describe('yarn-commands', () => {
+  describe('getYarnVersion', () => {
+    it('should run yarn --version with the correct parameters', async () => {
+      await getYarnVersion();
+
+      expect(miscUtils.getStdoutFromCommand).toHaveBeenCalledWith('yarn', [
+        '--version',
+      ]);
+    });
+  });
+
   describe('fixConstraints', () => {
-    const repositoryDirectoryPath = '/path/to/repo';
+    it('should run yarn constraints --fix when yarn version is compatible with constraints', async () => {
+      const repositoryDirectoryPath = '/path/to/repo';
+      when(jest.spyOn(miscUtils, 'getStdoutFromCommand'))
+        .calledWith('yarn', ['--version'])
+        .mockResolvedValue('2.0.0');
 
-    it('should run yarn constraints --fix with the correct parameters', async () => {
       await fixConstraints(repositoryDirectoryPath);
 
-      expect(runCommand).toHaveBeenCalledWith(
+      expect(miscUtils.runCommand).toHaveBeenCalledWith(
         'yarn',
         ['constraints', '--fix'],
         {
           cwd: repositoryDirectoryPath,
         },
       );
     });
+
+    it('should not run yarn constraints --fix when yarn version is not compatible with constraints', async () => {
+      const repositoryDirectoryPath = '/path/to/repo';
+      when(jest.spyOn(miscUtils, 'getStdoutFromCommand'))
+        .calledWith('yarn', ['--version'])
+        .mockResolvedValue('1.0.0');
+
+      await fixConstraints(repositoryDirectoryPath);
+
+      expect(miscUtils.runCommand).toHaveBeenCalledTimes(0);
+    });
   });
 
   describe('installDependencies', () => {
-    const repositoryDirectoryPath = '/path/to/repo';
-
     it('should run yarn with the correct parameters', async () => {
+      const repositoryDirectoryPath = '/path/to/repo';
+
       await installDependencies('/path/to/repo');
 
-      expect(runCommand).toHaveBeenCalledWith('yarn', [], {
+      expect(miscUtils.runCommand).toHaveBeenCalledWith('yarn', [], {
         cwd: repositoryDirectoryPath,
       });
     });