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* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect, vi, beforeEach } from 'vitest';
import { MemoryContextManager } from './memoryContextManager.js';
import * as memoryDiscovery from '../utils/memoryDiscovery.js';
import type { Config } from '../config/config.js';
import { coreEvents, CoreEvent } from '../utils/events.js';
// Mock memoryDiscovery module
vi.mock('../utils/memoryDiscovery.js', async (importOriginal) => {
const actual =
await importOriginal<typeof import('../utils/memoryDiscovery.js')>();
return {
...actual,
getGlobalMemoryPaths: vi.fn(),
getUserProjectMemoryPaths: vi.fn(),
getExtensionMemoryPaths: vi.fn(),
getEnvironmentMemoryPaths: vi.fn(),
readGeminiMdFiles: vi.fn(),
loadJitSubdirectoryMemory: vi.fn(),
deduplicatePathsByFileIdentity: vi.fn(),
concatenateInstructions: vi
.fn()
.mockImplementation(actual.concatenateInstructions),
};
});
describe('MemoryContextManager', () => {
let memoryContextManager: MemoryContextManager;
let mockConfig: Config;
beforeEach(() => {
mockConfig = {
getWorkingDir: vi.fn().mockReturnValue('/app'),
getImportFormat: vi.fn().mockReturnValue('tree'),
getWorkspaceContext: vi.fn().mockReturnValue({
getDirectories: vi.fn().mockReturnValue(['/app']),
}),
getExtensionLoader: vi.fn().mockReturnValue({
getExtensions: vi.fn().mockReturnValue([]),
}),
getMcpClientManager: vi.fn().mockReturnValue({
getMcpInstructions: vi.fn().mockReturnValue('MCP Instructions'),
}),
isTrustedFolder: vi.fn().mockReturnValue(true),
getMemoryBoundaryMarkers: vi.fn().mockReturnValue(['.git']),
storage: {
getProjectMemoryDir: vi
.fn()
.mockReturnValue('/home/user/.gemini/memory/test-project'),
},
} as unknown as Config;
memoryContextManager = new MemoryContextManager(mockConfig);
vi.clearAllMocks();
vi.spyOn(coreEvents, 'emit');
vi.mocked(memoryDiscovery.getExtensionMemoryPaths).mockReturnValue([]);
vi.mocked(memoryDiscovery.getUserProjectMemoryPaths).mockResolvedValue([]);
// default mock: deduplication returns paths as-is (no deduplication)
vi.mocked(
memoryDiscovery.deduplicatePathsByFileIdentity,
).mockImplementation(async (paths: string[]) => ({
paths,
identityMap: new Map<string, string>(),
}));
});
describe('refresh', () => {
it('should load and format global and environment memory', async () => {
const globalPaths = ['/home/user/.gemini/GEMINI.md'];
const envPaths = ['/app/GEMINI.md'];
vi.mocked(memoryDiscovery.getGlobalMemoryPaths).mockResolvedValue(
globalPaths,
);
vi.mocked(memoryDiscovery.getEnvironmentMemoryPaths).mockResolvedValue(
envPaths,
);
vi.mocked(memoryDiscovery.readGeminiMdFiles).mockResolvedValue([
{ filePath: globalPaths[0], content: 'Global Content' },
{ filePath: envPaths[0], content: 'Env Content' },
]);
await memoryContextManager.refresh();
expect(memoryDiscovery.getGlobalMemoryPaths).toHaveBeenCalled();
expect(memoryDiscovery.getEnvironmentMemoryPaths).toHaveBeenCalledWith(
['/app'],
['.git'],
);
expect(memoryDiscovery.readGeminiMdFiles).toHaveBeenCalledWith(
expect.arrayContaining([...globalPaths, ...envPaths]),
'tree',
['.git'],
);
expect(memoryContextManager.getGlobalMemory()).toContain(
'Global Content',
);
expect(memoryContextManager.getEnvironmentMemory()).toContain(
'Env Content',
);
expect(memoryContextManager.getEnvironmentMemory()).toContain(
'MCP Instructions',
);
expect(memoryContextManager.getLoadedPaths()).toContain(globalPaths[0]);
expect(memoryContextManager.getLoadedPaths()).toContain(envPaths[0]);
});
it('should emit MemoryChanged event when memory is refreshed', async () => {
vi.mocked(memoryDiscovery.getGlobalMemoryPaths).mockResolvedValue([
'/app/GEMINI.md',
]);
vi.mocked(memoryDiscovery.getEnvironmentMemoryPaths).mockResolvedValue([
'/app/src/GEMINI.md',
]);
vi.mocked(memoryDiscovery.readGeminiMdFiles).mockResolvedValue([
{ filePath: '/app/GEMINI.md', content: 'content' },
{ filePath: '/app/src/GEMINI.md', content: 'env content' },
]);
await memoryContextManager.refresh();
expect(coreEvents.emit).toHaveBeenCalledWith(CoreEvent.MemoryChanged, {
fileCount: 2,
});
});
it('should not load environment memory if folder is not trusted', async () => {
vi.mocked(mockConfig.isTrustedFolder).mockReturnValue(false);
vi.mocked(memoryDiscovery.getGlobalMemoryPaths).mockResolvedValue([
'/home/user/.gemini/GEMINI.md',
]);
vi.mocked(memoryDiscovery.readGeminiMdFiles).mockResolvedValue([
{ filePath: '/home/user/.gemini/GEMINI.md', content: 'Global Content' },
]);
await memoryContextManager.refresh();
expect(memoryDiscovery.getEnvironmentMemoryPaths).not.toHaveBeenCalled();
expect(memoryContextManager.getEnvironmentMemory()).toBe('');
expect(memoryContextManager.getGlobalMemory()).toContain(
'Global Content',
);
});
it('should deduplicate files by file identity in case-insensitive filesystems', async () => {
const globalPaths = ['/home/user/.gemini/GEMINI.md'];
const envPaths = ['/app/gemini.md', '/app/GEMINI.md'];
vi.mocked(memoryDiscovery.getGlobalMemoryPaths).mockResolvedValue(
globalPaths,
);
vi.mocked(memoryDiscovery.getEnvironmentMemoryPaths).mockResolvedValue(
envPaths,
);
// mock deduplication to return deduplicated paths (simulating same file)
vi.mocked(
memoryDiscovery.deduplicatePathsByFileIdentity,
).mockResolvedValue({
paths: ['/home/user/.gemini/GEMINI.md', '/app/gemini.md'],
identityMap: new Map<string, string>(),
});
vi.mocked(memoryDiscovery.readGeminiMdFiles).mockResolvedValue([
{ filePath: '/home/user/.gemini/GEMINI.md', content: 'Global Content' },
{ filePath: '/app/gemini.md', content: 'Project Content' },
]);
await memoryContextManager.refresh();
expect(
memoryDiscovery.deduplicatePathsByFileIdentity,
).toHaveBeenCalledWith(
expect.arrayContaining([
'/home/user/.gemini/GEMINI.md',
'/app/gemini.md',
'/app/GEMINI.md',
]),
);
expect(memoryDiscovery.readGeminiMdFiles).toHaveBeenCalledWith(
['/home/user/.gemini/GEMINI.md', '/app/gemini.md'],
'tree',
['.git'],
);
expect(memoryContextManager.getEnvironmentMemory()).toContain(
'Project Content',
);
});
});
describe('discoverContext', () => {
it('should discover and load new context', async () => {
const mockResult: memoryDiscovery.MemoryLoadResult = {
files: [{ path: '/app/src/GEMINI.md', content: 'Src Content' }],
};
vi.mocked(memoryDiscovery.loadJitSubdirectoryMemory).mockResolvedValue(
mockResult,
);
const result = await memoryContextManager.discoverContext(
'/app/src/file.ts',
['/app'],
);
expect(memoryDiscovery.loadJitSubdirectoryMemory).toHaveBeenCalledWith(
'/app/src/file.ts',
['/app'],
expect.any(Set),
expect.any(Set),
['.git'],
);
expect(result).toMatch(/--- Context from: \/app\/src\/GEMINI\.md ---/);
expect(result).toContain('Src Content');
expect(memoryContextManager.getLoadedPaths()).toContain(
'/app/src/GEMINI.md',
);
});
it('should return empty string if no new files found', async () => {
const mockResult: memoryDiscovery.MemoryLoadResult = { files: [] };
vi.mocked(memoryDiscovery.loadJitSubdirectoryMemory).mockResolvedValue(
mockResult,
);
const result = await memoryContextManager.discoverContext(
'/app/src/file.ts',
['/app'],
);
expect(result).toBe('');
});
it('should return empty string if folder is not trusted', async () => {
vi.mocked(mockConfig.isTrustedFolder).mockReturnValue(false);
const result = await memoryContextManager.discoverContext(
'/app/src/file.ts',
['/app'],
);
expect(memoryDiscovery.loadJitSubdirectoryMemory).not.toHaveBeenCalled();
expect(result).toBe('');
});
it('should pass custom boundary markers from config', async () => {
const customMarkers = ['.monorepo-root', 'package.json'];
vi.mocked(mockConfig.getMemoryBoundaryMarkers).mockReturnValue(
customMarkers,
);
vi.mocked(memoryDiscovery.loadJitSubdirectoryMemory).mockResolvedValue({
files: [],
});
await memoryContextManager.discoverContext('/app/src/file.ts', ['/app']);
expect(memoryDiscovery.loadJitSubdirectoryMemory).toHaveBeenCalledWith(
'/app/src/file.ts',
['/app'],
expect.any(Set),
expect.any(Set),
customMarkers,
);
});
});
});
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