feat(release): update release process for nightly and preview builds (#6643)

Co-authored-by: Bryan Morgan <bryanmorgan@google.com>

scripts/tests/get-release-version.test.js

@@ -6,59 +6,98 @@
 
 import { vi, describe, it, expect, beforeEach, afterEach } from 'vitest';
 import { getReleaseVersion } from '../get-release-version';
-import { execSync } from 'child_process';
-import * as fs from 'fs';
 
+// Mock child_process so we can spy on execSync
 vi.mock('child_process', () => ({
   execSync: vi.fn(),
 }));
 
-vi.mock('fs', async (importOriginal) => {
-  const mod = await importOriginal();
-  return {
-    ...mod,
-    default: {
-      ...mod.default,
-      readFileSync: vi.fn(),
-    },
-  };
-});
-
-describe('getReleaseVersion', () => {
+describe('getReleaseVersion', async () => {
+  // Dynamically import execSync after mocking
+  const { execSync } = await import('child_process');
   const originalEnv = { ...process.env };
 
   beforeEach(() => {
-    vi.resetModules();
+    vi.resetAllMocks();
     process.env = { ...originalEnv };
-    vi.useFakeTimers();
+    // Mock date to be consistent
+    vi.setSystemTime(new Date('2025-08-20T00:00:00.000Z'));
+    // Provide a default mock for execSync to avoid toString() on undefined
+    vi.mocked(execSync).mockReturnValue('');
   });
 
   afterEach(() => {
     process.env = originalEnv;
-    vi.clearAllMocks();
     vi.useRealTimers();
   });
 
-  it('should calculate nightly version when IS_NIGHTLY is true', () => {
+  it('should generate a nightly version and get previous tag', () => {
     process.env.IS_NIGHTLY = 'true';
-    const knownDate = new Date('2025-07-20T10:00:00.000Z');
-    vi.setSystemTime(knownDate);
-    vi.mocked(fs.default.readFileSync).mockReturnValue(
-      JSON.stringify({ version: '0.1.0' }),
-    );
-    vi.mocked(execSync).mockReturnValue('abcdef');
-    const { releaseTag, releaseVersion, npmTag } = getReleaseVersion();
-    expect(releaseTag).toBe('v0.1.0-nightly.250720.abcdef');
-    expect(releaseVersion).toBe('0.1.0-nightly.250720.abcdef');
-    expect(npmTag).toBe('nightly');
+
+    vi.mocked(execSync).mockImplementation((command) => {
+      if (command.includes('git tag')) {
+        return 'v0.1.0\nv0.0.1';
+      }
+      if (command.includes('git rev-parse')) {
+        return 'abcdef';
+      }
+      if (command.includes('gh release list')) {
+        return 'v0.3.0-nightly.20250819.abcdef';
+      }
+      return '';
+    });
+
+    const result = getReleaseVersion();
+
+    expect(result).toEqual({
+      releaseTag: 'v0.3.0-nightly.20250820.abcdef',
+      releaseVersion: '0.3.0-nightly.20250820.abcdef',
+      npmTag: 'nightly',
+      previousReleaseTag: 'v0.3.0-nightly.20250819.abcdef',
+    });
   });
 
-  it('should use manual version when provided', () => {
-    process.env.MANUAL_VERSION = '1.2.3';
-    const { releaseTag, releaseVersion, npmTag } = getReleaseVersion();
-    expect(releaseTag).toBe('v1.2.3');
-    expect(releaseVersion).toBe('1.2.3');
-    expect(npmTag).toBe('latest');
+  it('should generate a preview version and get previous tag', () => {
+    process.env.IS_PREVIEW = 'true';
+
+    vi.mocked(execSync).mockImplementation((command) => {
+      if (command.includes('git tag')) {
+        return 'v0.1.0\nv0.0.1';
+      }
+      if (command.includes('gh release list')) {
+        return 'v0.1.0'; // Previous stable release
+      }
+      return '';
+    });
+
+    const result = getReleaseVersion();
+
+    expect(result).toEqual({
+      releaseTag: 'v0.2.0-preview',
+      releaseVersion: '0.2.0-preview',
+      npmTag: 'preview',
+      previousReleaseTag: 'v0.1.0',
+    });
+  });
+
+  it('should use the manual version and get previous tag', () => {
+    process.env.MANUAL_VERSION = 'v0.1.1';
+
+    vi.mocked(execSync).mockImplementation((command) => {
+      if (command.includes('gh release list')) {
+        return 'v0.1.0'; // Previous stable release
+      }
+      return '';
+    });
+
+    const result = getReleaseVersion();
+
+    expect(result).toEqual({
+      releaseTag: 'v0.1.1',
+      releaseVersion: '0.1.1',
+      npmTag: 'latest',
+      previousReleaseTag: 'v0.1.0',
+    });
   });
 
   it('should prepend v to manual version if missing', () => {
@@ -82,9 +121,9 @@ describe('getReleaseVersion', () => {
     );
   });
 
-  it('should throw an error if no version is provided for non-nightly release', () => {
+  it('should throw an error if no version is provided for non-nightly/preview release', () => {
     expect(() => getReleaseVersion()).toThrow(
-      'Error: No version specified and this is not a nightly release.',
+      'Error: No version specified and this is not a nightly or preview release.',
     );
   });
 
@@ -94,18 +133,22 @@ describe('getReleaseVersion', () => {
       'Error: Versions with build metadata (+) are not supported for releases.',
     );
   });
-});
 
-describe('get-release-version script', () => {
-  it('should print version JSON to stdout when executed directly', () => {
-    const expectedJson = {
-      releaseTag: 'v0.1.0-nightly.20250705',
-      releaseVersion: '0.1.0-nightly.20250705',
-      npmTag: 'nightly',
-    };
-    execSync.mockReturnValue(JSON.stringify(expectedJson));
+  it('should correctly calculate the next version from a patch release', () => {
+    process.env.IS_PREVIEW = 'true';
 
-    const result = execSync('node scripts/get-release-version.js').toString();
-    expect(JSON.parse(result)).toEqual(expectedJson);
+    vi.mocked(execSync).mockImplementation((command) => {
+      if (command.includes('git tag')) {
+        return 'v1.1.3\nv1.1.2\nv1.1.1\nv1.1.0\nv1.0.0';
+      }
+      if (command.includes('gh release list')) {
+        return 'v1.1.3';
+      }
+      return '';
+    });
+
+    const result = getReleaseVersion();
+
+    expect(result.releaseTag).toBe('v1.2.0-preview');
   });
 });