test cases update

__tests__/main.test.ts

@@ -173,7 +173,44 @@
     });
   });
 
-
+  describe('getNodeVersionFromFile', () => {
+    each`
+      contents                                     | expected
+      ${'12'}                                      | ${'12'}
+      ${'12.3'}                                    | ${'12.3'}
+      ${'12.3.4'}                                  | ${'12.3.4'}
+      ${'v12.3.4'}                                 | ${'12.3.4'}
+      ${'lts/erbium'}                              | ${'lts/erbium'}
+      ${'lts/*'}                                   | ${'lts/*'}
+      ${'nodejs 12.3.4'}                           | ${'12.3.4'}
+      ${'ruby 2.3.4\nnodejs 12.3.4\npython 3.4.5'} | ${'12.3.4'}
+      ${''}                                        | ${''}
+      ${'unknown format'}                          | ${'unknown format'}
+      ${'  14.1.0  '}                              | ${'14.1.0'}
+      ${'{"volta": {"node": ">=14.0.0 <=17.0.0"}}'}| ${'>=14.0.0 <=17.0.0'}
+      ${'{"volta": {"extends": "./package.json"}}'}| ${'18.0.0'}
+      ${'{"engines": {"node": "17.0.0"}}'}         | ${'17.0.0'}
+      ${'{}'}                                      | ${null}
+    `.it('parses "$contents"', ({contents, expected}) => {
+      const existsSpy = jest.spyOn(fs, 'existsSync');
+      existsSpy.mockImplementation(() => true);
+
+      const readFileSpy = jest.spyOn(fs, 'readFileSync');
+      readFileSpy.mockImplementation(filePath => {
+        if (
+          typeof filePath === 'string' &&
+          path.basename(filePath) === 'package.json'
+        ) {
+          // Special case for volta.extends
+          return '{"volta": {"node": "18.0.0"}}';
+        }
+
+        return contents;
+      });
+
+      expect(util.getNodeVersionFromFile('file')).toBe(expected);
+    });
+  });
 
   describe('node-version-file flag', () => {
     beforeEach(() => {
@@ -291,5 +328,40 @@
     });
   });
 
-
+  describe('mirror-url parameter', () => {
+    beforeEach(() => {
+      inputs['mirror-url'] = 'https://custom-mirror-url.com';
+
+      validateMirrorUrlSpy = jest.spyOn(main, 'run');
+      validateMirrorUrlSpy.mockImplementation(() => {});
+    });
+
+    afterEach(() => {
+      validateMirrorUrlSpy.mockRestore();
+    });
+
+    it('Read mirror-url if mirror-url is provided', async () => {
+      // Arrange
+      inputs['mirror-url'] = 'https://custom-mirror-url.com';
+
+      // Act
+      await main.run();
+
+      // Assert
+      expect(inputs['mirror-url']).toBeDefined();
+    });
+
+    it('should throw an error if mirror-url is empty', async () => {
+      // Arrange
+      inputs['mirror-url'] = ' ';
+
+      // Mock log and setFailed
+      const logSpy = jest.spyOn(console, 'log').mockImplementation(() => {}); // Mock the log function
+
+      // Act & Assert
+      expect(() => validateMirrorURL(inputs['mirror-url'])).toThrowError(
+        'Mirror URL is empty. Please provide a valid mirror URL.'
+      );
+    });
+  });
 });