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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import {
CompressionStatus,
type ChatCompressionInfo,
type GeminiClient,
} from '@google/gemini-cli-core';
import { vi, describe, it, expect, beforeEach } from 'vitest';
import { compressCommand } from './compressCommand.js';
import { createMockCommandContext } from '../../test-utils/mockCommandContext.js';
import { MessageType } from '../types.js';
describe('compressCommand', () => {
let context: ReturnType<typeof createMockCommandContext>;
let mockTryCompressChat: ReturnType<typeof vi.fn>;
beforeEach(() => {
mockTryCompressChat = vi.fn();
context = createMockCommandContext({
services: {
config: {
getGeminiClient: () =>
({
tryCompressChat: mockTryCompressChat,
}) as unknown as GeminiClient,
},
},
});
});
it('should do nothing if a compression is already pending', async () => {
context.ui.pendingItem = {
type: MessageType.COMPRESSION,
compression: {
isPending: true,
originalTokenCount: null,
newTokenCount: null,
compressionStatus: null,
},
};
await compressCommand.action!(context, '');
expect(context.ui.addItem).toHaveBeenCalledWith(
expect.objectContaining({
type: MessageType.ERROR,
text: 'Already compressing, wait for previous request to complete',
}),
expect.any(Number),
);
expect(context.ui.setPendingItem).not.toHaveBeenCalled();
expect(mockTryCompressChat).not.toHaveBeenCalled();
});
it('should set pending item, call tryCompressChat, and add result on success', async () => {
const compressedResult: ChatCompressionInfo = {
originalTokenCount: 200,
compressionStatus: CompressionStatus.COMPRESSED,
newTokenCount: 100,
};
mockTryCompressChat.mockResolvedValue(compressedResult);
await compressCommand.action!(context, '');
expect(context.ui.setPendingItem).toHaveBeenNthCalledWith(1, {
type: MessageType.COMPRESSION,
compression: {
isPending: true,
compressionStatus: null,
originalTokenCount: null,
newTokenCount: null,
},
});
expect(mockTryCompressChat).toHaveBeenCalledWith(
expect.stringMatching(/^compress-\d+$/),
true,
);
expect(context.ui.addItem).toHaveBeenCalledWith(
{
type: MessageType.COMPRESSION,
compression: {
isPending: false,
compressionStatus: CompressionStatus.COMPRESSED,
originalTokenCount: 200,
newTokenCount: 100,
},
},
expect.any(Number),
);
expect(context.ui.setPendingItem).toHaveBeenNthCalledWith(2, null);
});
it('should add an error message if tryCompressChat returns falsy', async () => {
mockTryCompressChat.mockResolvedValue(null);
await compressCommand.action!(context, '');
expect(context.ui.addItem).toHaveBeenCalledWith(
expect.objectContaining({
type: MessageType.ERROR,
text: 'Failed to compress chat history.',
}),
expect.any(Number),
);
expect(context.ui.setPendingItem).toHaveBeenCalledWith(null);
});
it('should add an error message if tryCompressChat throws', async () => {
const error = new Error('Compression failed');
mockTryCompressChat.mockRejectedValue(error);
await compressCommand.action!(context, '');
expect(context.ui.addItem).toHaveBeenCalledWith(
expect.objectContaining({
type: MessageType.ERROR,
text: `Failed to compress chat history: ${error.message}`,
}),
expect.any(Number),
);
expect(context.ui.setPendingItem).toHaveBeenCalledWith(null);
});
it('should clear the pending item in a finally block', async () => {
mockTryCompressChat.mockRejectedValue(new Error('some error'));
await compressCommand.action!(context, '');
expect(context.ui.setPendingItem).toHaveBeenCalledWith(null);
});
});
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