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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import {
describe,
it,
expect,
vi,
beforeEach,
afterEach,
type Mock,
} from 'vitest';
import {
getEnvironmentContext,
getDirectoryContextString,
} from './environmentContext.js';
import { Config } from '../config/config.js';
import { getFolderStructure } from './getFolderStructure.js';
vi.mock('../config/config.js');
vi.mock('./getFolderStructure.js', () => ({
getFolderStructure: vi.fn(),
}));
vi.mock('../tools/read-many-files.js');
describe('getDirectoryContextString', () => {
let mockConfig: Partial<Config>;
beforeEach(() => {
mockConfig = {
getWorkspaceContext: vi.fn().mockReturnValue({
getDirectories: vi.fn().mockReturnValue(['/test/dir']),
}),
getFileService: vi.fn(),
};
vi.mocked(getFolderStructure).mockResolvedValue('Mock Folder Structure');
});
afterEach(() => {
vi.resetAllMocks();
});
it('should return context string for a single directory', async () => {
const contextString = await getDirectoryContextString(mockConfig as Config);
expect(contextString).toContain(
"I'm currently working in the directory: /test/dir",
);
expect(contextString).toContain(
'Here is the folder structure of the current working directories:\n\nMock Folder Structure',
);
});
it('should return context string for multiple directories', async () => {
(
vi.mocked(mockConfig.getWorkspaceContext!)().getDirectories as Mock
).mockReturnValue(['/test/dir1', '/test/dir2']);
vi.mocked(getFolderStructure)
.mockResolvedValueOnce('Structure 1')
.mockResolvedValueOnce('Structure 2');
const contextString = await getDirectoryContextString(mockConfig as Config);
expect(contextString).toContain(
"I'm currently working in the following directories:\n - /test/dir1\n - /test/dir2",
);
expect(contextString).toContain(
'Here is the folder structure of the current working directories:\n\nStructure 1\nStructure 2',
);
});
});
describe('getEnvironmentContext', () => {
let mockConfig: Partial<Config>;
let mockToolRegistry: { getTool: Mock };
beforeEach(() => {
vi.useFakeTimers();
vi.setSystemTime(new Date('2025-08-05T12:00:00Z'));
mockToolRegistry = {
getTool: vi.fn(),
};
mockConfig = {
getWorkspaceContext: vi.fn().mockReturnValue({
getDirectories: vi.fn().mockReturnValue(['/test/dir']),
}),
getFileService: vi.fn(),
getFullContext: vi.fn().mockReturnValue(false),
getToolRegistry: vi.fn().mockResolvedValue(mockToolRegistry),
};
vi.mocked(getFolderStructure).mockResolvedValue('Mock Folder Structure');
});
afterEach(() => {
vi.useRealTimers();
vi.resetAllMocks();
});
it('should return basic environment context for a single directory', async () => {
const parts = await getEnvironmentContext(mockConfig as Config);
expect(parts.length).toBe(1);
const context = parts[0].text;
expect(context).toContain("Today's date is Tuesday, August 5, 2025");
expect(context).toContain(`My operating system is: ${process.platform}`);
expect(context).toContain(
"I'm currently working in the directory: /test/dir",
);
expect(context).toContain(
'Here is the folder structure of the current working directories:\n\nMock Folder Structure',
);
expect(getFolderStructure).toHaveBeenCalledWith('/test/dir', {
fileService: undefined,
});
});
it('should return basic environment context for multiple directories', async () => {
(
vi.mocked(mockConfig.getWorkspaceContext!)().getDirectories as Mock
).mockReturnValue(['/test/dir1', '/test/dir2']);
vi.mocked(getFolderStructure)
.mockResolvedValueOnce('Structure 1')
.mockResolvedValueOnce('Structure 2');
const parts = await getEnvironmentContext(mockConfig as Config);
expect(parts.length).toBe(1);
const context = parts[0].text;
expect(context).toContain(
"I'm currently working in the following directories:\n - /test/dir1\n - /test/dir2",
);
expect(context).toContain(
'Here is the folder structure of the current working directories:\n\nStructure 1\nStructure 2',
);
expect(getFolderStructure).toHaveBeenCalledTimes(2);
});
it('should include full file context when getFullContext is true', async () => {
mockConfig.getFullContext = vi.fn().mockReturnValue(true);
const mockReadManyFilesTool = {
build: vi.fn().mockReturnValue({
execute: vi
.fn()
.mockResolvedValue({ llmContent: 'Full file content here' }),
}),
};
mockToolRegistry.getTool.mockReturnValue(mockReadManyFilesTool);
const parts = await getEnvironmentContext(mockConfig as Config);
expect(parts.length).toBe(2);
expect(parts[1].text).toBe(
'\n--- Full File Context ---\nFull file content here',
);
expect(mockToolRegistry.getTool).toHaveBeenCalledWith('read_many_files');
expect(mockReadManyFilesTool.build).toHaveBeenCalledWith({
paths: ['**/*'],
useDefaultExcludes: true,
});
});
it('should handle read_many_files returning no content', async () => {
mockConfig.getFullContext = vi.fn().mockReturnValue(true);
const mockReadManyFilesTool = {
build: vi.fn().mockReturnValue({
execute: vi.fn().mockResolvedValue({ llmContent: '' }),
}),
};
mockToolRegistry.getTool.mockReturnValue(mockReadManyFilesTool);
const parts = await getEnvironmentContext(mockConfig as Config);
expect(parts.length).toBe(1); // No extra part added
});
it('should handle read_many_files tool not being found', async () => {
mockConfig.getFullContext = vi.fn().mockReturnValue(true);
mockToolRegistry.getTool.mockReturnValue(null);
const parts = await getEnvironmentContext(mockConfig as Config);
expect(parts.length).toBe(1); // No extra part added
});
it('should handle errors when reading full file context', async () => {
mockConfig.getFullContext = vi.fn().mockReturnValue(true);
const mockReadManyFilesTool = {
build: vi.fn().mockReturnValue({
execute: vi.fn().mockRejectedValue(new Error('Read error')),
}),
};
mockToolRegistry.getTool.mockReturnValue(mockReadManyFilesTool);
const parts = await getEnvironmentContext(mockConfig as Config);
expect(parts.length).toBe(2);
expect(parts[1].text).toBe('\n--- Error reading full file context ---');
});
});
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