Fix: derive the integrations version assertion from package.json and run the dead unit:integrations vitest project

integrations/test/version_test.ts

@@ -5,10 +5,32 @@
  */
 
 import {version} from '@google/adk-integrations';
+import {readFileSync} from 'node:fs';
+import * as path from 'node:path';
+import {fileURLToPath} from 'node:url';
 import {describe, expect, it} from 'vitest';
 
+const dirname = path.dirname(fileURLToPath(import.meta.url));
+
+/**
+ * release-please rewrites `integrations/package.json` and the
+ * `x-release-please-version` line in `integrations/src/version.ts` together but
+ * never touches this test, so any literal here goes stale at the next release.
+ * Deriving the expectation from the manifest keeps the assertion correct across
+ * releases and catches the two halves drifting apart. The path is resolved from
+ * this file's own URL because vitest runs with the repository root as the
+ * working directory.
+ */
+const manifest: {version: string} = JSON.parse(
+  readFileSync(path.join(dirname, '..', 'package.json'), 'utf-8'),
+);
+
 describe('version', () => {
-  it('should return the correct version', () => {
-    expect(version).toBe('1.3.0');
+  it('should be a semantic version string', () => {
+    expect(version).toMatch(/^\d+\.\d+\.\d+/);
+  });
+
+  it('should match the version declared in package.json', () => {
+    expect(version).toBe(manifest.version);
   });
 });

package.json

@@ -24,12 +24,12 @@
     "docs:generate": "typedoc",
     "docs:serve": "http-server api-reference/typescript",
     "docs:check": "typedoc --emit none --treatWarningsAsErrors",
-    "test": "vitest --project unit:core --project unit:dev --project integration --project e2e",
-    "test:unit": "vitest --project unit:core --project unit:dev",
+    "test": "vitest --project unit:core --project unit:dev --project unit:integrations --project integration --project e2e",
+    "test:unit": "vitest --project unit:core --project unit:dev --project unit:integrations",
     "test:integration": "vitest --project integration",
     "test:e2e": "vitest --project e2e",
     "test:cross-language": "vitest --project cross-language",
-    "test:coverage": "vitest run --project unit:core --project unit:dev --project integration --project e2e --coverage",
+    "test:coverage": "vitest run --project unit:core --project unit:dev --project unit:integrations --project integration --project e2e --coverage",
     "prepare": "husky"
   },
   "workspaces": [