test(integration-tests): isolate user memory from test runs (#6790)

integration-tests/globalSetup.ts

@@ -9,16 +9,38 @@ if (process.env.NO_COLOR !== undefined) {
   delete process.env.NO_COLOR;
 }
 
-import { mkdir, readdir, rm } from 'fs/promises';
+import { mkdir, readdir, rm, readFile, writeFile, unlink } from 'fs/promises';
 import { join, dirname } from 'path';
 import { fileURLToPath } from 'url';
+import * as os from 'os';
+
+import {
+  GEMINI_CONFIG_DIR,
+  DEFAULT_CONTEXT_FILENAME,
+} from '../packages/core/src/tools/memoryTool.js';
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 const rootDir = join(__dirname, '..');
 const integrationTestsDir = join(rootDir, '.integration-tests');
 let runDir = ''; // Make runDir accessible in teardown
 
+const memoryFilePath = join(
+  os.homedir(),
+  GEMINI_CONFIG_DIR,
+  DEFAULT_CONTEXT_FILENAME,
+);
+let originalMemoryContent: string | null = null;
+
 export async function setup() {
+  try {
+    originalMemoryContent = await readFile(memoryFilePath, 'utf-8');
+  } catch (e) {
+    if ((e as NodeJS.ErrnoException).code !== 'ENOENT') {
+      throw e;
+    }
+    // File doesn't exist, which is fine.
+  }
+
   runDir = join(integrationTestsDir, `${Date.now()}`);
   await mkdir(runDir, { recursive: true });
 
@@ -57,4 +79,15 @@ export async function teardown() {
   if (process.env.KEEP_OUTPUT !== 'true' && runDir) {
     await rm(runDir, { recursive: true, force: true });
   }
+
+  if (originalMemoryContent !== null) {
+    await mkdir(dirname(memoryFilePath), { recursive: true });
+    await writeFile(memoryFilePath, originalMemoryContent, 'utf-8');
+  } else {
+    try {
+      await unlink(memoryFilePath);
+    } catch {
+      // File might not exist if the test failed before creating it.
+    }
+  }
 }

integration-tests/tsconfig.json

@@ -4,5 +4,6 @@
     "noEmit": true,
     "allowJs": true
   },
-  "include": ["**/*.ts"]
+  "include": ["**/*.ts"],
+  "references": [{ "path": "../packages/core" }]
 }