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import { ContextManagerImpl } from '../core/context-manager';
import type { ProviderAdapter, ParsedResponse, Message } from '../core/types';
function mockProvider(summaryText: string): ProviderAdapter {
return {
call: vi.fn().mockResolvedValue({ content: summaryText }),
getModel: () => 'test-model',
getProvider: () => 'test',
supportsTools: () => true,
};
}
const defaultConfig = {
contextLength: 100000,
threshold: 60000,
recentKeepRatio: 0.2,
summaryTokenRatio: 0.1,
buildCompactionPrompt: (prev?: string) => prev ? `prev: ${prev}\nsummarize` : 'summarize',
};
// Config with small context for testing compaction triggers
const smallConfig = {
contextLength: 1000,
threshold: 500,
recentKeepRatio: 0.2,
summaryTokenRatio: 0.1,
buildCompactionPrompt: (prev?: string) => prev ? `prev: ${prev}\nsummarize` : 'summarize',
};
describe('ContextManagerImpl', () => {
it('adds user message', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.addUserMessage('hello');
const msgs = cm.getMessages();
expect(msgs).toHaveLength(1);
expect(msgs[0].role).toBe('user');
expect(msgs[0].content).toBe('hello');
});
it('adds assistant turn with tool calls', () => {
const cm = new ContextManagerImpl(defaultConfig);
const response: ParsedResponse = {
content: 'I will help',
toolCalls: [{ id: 'tc1', type: 'function', function: { name: 'bash', arguments: '{"command":"ls"}' } }],
};
cm.addAssistantTurn(response);
const msgs = cm.getMessages();
expect(msgs[0].role).toBe('assistant');
expect(msgs[0].tool_calls).toHaveLength(1);
});
it('adds tool results', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.addToolResults([{ tool_call_id: 'tc1', content: 'file.txt', success: true }]);
const msgs = cm.getMessages();
expect(msgs[0].role).toBe('tool');
expect(msgs[0].tool_call_id).toBe('tc1');
});
it('imports messages', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.addUserMessage('old message');
const imported: Message[] = [
{ role: 'system', content: 'sys' },
{ role: 'user', content: 'imported' },
];
cm.importMessages(imported);
expect(cm.getMessages()).toHaveLength(2);
expect(cm.getMessages()[1].content).toBe('imported');
});
it('sets system prompt', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.setSystemPrompt('you are helpful');
expect(cm.getMessages()[0]).toEqual({ role: 'system', content: 'you are helpful' });
cm.setSystemPrompt('updated');
expect(cm.getMessages()[0].content).toBe('updated');
expect(cm.getMessages()).toHaveLength(1);
});
it('reports needsCompaction correctly', () => {
const cm = new ContextManagerImpl(defaultConfig);
expect(cm.needsCompaction(50000)).toBe(false);
expect(cm.needsCompaction(60000)).toBe(true);
expect(cm.needsCompaction(70000)).toBe(true);
});
it('calls onMessageAdded hook', () => {
const cm = new ContextManagerImpl(defaultConfig);
const hook = vi.fn();
cm.onMessageAdded = hook;
cm.addUserMessage('test');
expect(hook).toHaveBeenCalledWith(expect.objectContaining({ role: 'user', content: 'test' }));
});
it('estimates token count', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.addUserMessage('hello world'); // 11 chars -> ~3 tokens
const estimate = cm.getTokenEstimate();
expect(estimate).toBeGreaterThan(0);
expect(estimate).toBe(Math.round(11 / 3.5));
});
it('estimates tokens for tool calls', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.addAssistantTurn({
content: 'ok',
toolCalls: [{ id: 'tc1', type: 'function', function: { name: 'bash', arguments: '{"command":"ls -la"}' } }],
});
const estimate = cm.getTokenEstimate();
// content "ok" (2 chars) + args '{"command":"ls -la"}' (20 chars) = 22 / 3.5 ~ 6
expect(estimate).toBe(Math.round(22 / 3.5));
});
it('compacts conversation via provider', async () => {
const cm = new ContextManagerImpl(smallConfig);
cm.setSystemPrompt('system prompt');
// Add enough messages so there's something to compact (needs to exceed recent budget)
for (let i = 0; i < 10; i++) {
cm.addUserMessage(`user msg ${i} - ${'x'.repeat(200)}`);
cm.addAssistantTurn({ content: `response ${i} - ${'y'.repeat(200)}` });
}
const provider = mockProvider('Summary of conversation');
await cm.compact(provider, { freshSystemPrompt: 'fresh system prompt' });
const msgs = cm.getMessages();
// First message should be the fresh system prompt
expect(msgs[0].role).toBe('system');
expect(msgs[0].content).toBe('fresh system prompt');
// Should contain the summary somewhere
expect(msgs.some(m => typeof m.content === 'string' && m.content.includes('Summary of conversation'))).toBe(true);
// Should have called the provider
expect(provider.call).toHaveBeenCalled();
});
it('uses config.getFreshContext when compact() is called without explicit opts', async () => {
const cm = new ContextManagerImpl({
...smallConfig,
getFreshContext: async () => ({ systemPrompt: 'FRESH SYSTEM', projectContext: 'FRESH PROJECT CONTEXT' }),
});
cm.setSystemPrompt('stale system prompt');
for (let i = 0; i < 10; i++) {
cm.addUserMessage(`user msg ${i} - ${'x'.repeat(200)}`);
cm.addAssistantTurn({ content: `response ${i} - ${'y'.repeat(200)}` });
}
const provider = mockProvider('Summary of conversation');
await cm.compact(provider);
const msgs = cm.getMessages();
expect(msgs[0].content).toBe('FRESH SYSTEM');
expect(typeof msgs[1].content === 'string' && msgs[1].content.includes('FRESH PROJECT CONTEXT')).toBe(true);
});
it('compaction skips when too few messages', async () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.setSystemPrompt('system');
cm.addUserMessage('only message');
const provider = mockProvider('should not be called');
await cm.compact(provider, { freshSystemPrompt: 'fresh' });
// Provider should not be called
expect(provider.call).not.toHaveBeenCalled();
// Messages unchanged
expect(cm.getMessages()).toHaveLength(2);
});
it('compaction includes project context when provided', async () => {
const cm = new ContextManagerImpl(smallConfig);
cm.setSystemPrompt('system');
for (let i = 0; i < 10; i++) {
cm.addUserMessage(`user msg ${i} - ${'x'.repeat(200)}`);
cm.addAssistantTurn({ content: `response ${i} - ${'y'.repeat(200)}` });
}
const provider = mockProvider('Summary');
await cm.compact(provider, { freshSystemPrompt: 'fresh', projectContext: 'file tree here' });
const msgs = cm.getMessages();
// Second message (user) should reference project context
const contextMsg = msgs.find(m => m.role === 'user' && typeof m.content === 'string' && m.content.includes('file tree here'));
expect(contextMsg).toBeDefined();
});
it('compaction increments count', async () => {
const cm = new ContextManagerImpl(smallConfig);
cm.setSystemPrompt('system');
for (let i = 0; i < 10; i++) {
cm.addUserMessage(`user msg ${i} - ${'x'.repeat(200)}`);
cm.addAssistantTurn({ content: `response ${i} - ${'y'.repeat(200)}` });
}
const provider = mockProvider('Summary');
expect(cm.getCompactionCount()).toBe(0);
await cm.compact(provider, { freshSystemPrompt: 'fresh' });
expect(cm.getCompactionCount()).toBe(1);
});
it('compaction fails gracefully on empty provider response', async () => {
const cm = new ContextManagerImpl(smallConfig);
cm.setSystemPrompt('system');
for (let i = 0; i < 10; i++) {
cm.addUserMessage(`user msg ${i} - ${'x'.repeat(200)}`);
cm.addAssistantTurn({ content: `response ${i} - ${'y'.repeat(200)}` });
}
const provider = mockProvider('');
const msgsBefore = cm.getMessages().length;
await cm.compact(provider, { freshSystemPrompt: 'fresh' });
// Messages should be unchanged (graceful failure)
expect(cm.getMessages().length).toBe(msgsBefore);
});
it('repairs orphan tool calls', () => {
const cm = new ContextManagerImpl(defaultConfig);
// Assistant with tool call but no matching tool result
cm.addAssistantTurn({
content: 'let me check',
toolCalls: [{ id: 'tc1', type: 'function', function: { name: 'bash', arguments: '{"command":"ls"}' } }],
});
// No tool result added for tc1
cm.addUserMessage('next message');
const sanitized = cm.getSanitizedMessages();
// Should have: assistant, synthetic tool result for tc1, user
const toolMsg = sanitized.find(m => m.role === 'tool' && m.tool_call_id === 'tc1');
expect(toolMsg).toBeDefined();
expect(toolMsg!.content).toContain('cancelled');
});
it('repairs tool calls with empty arguments', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.addAssistantTurn({
content: 'text content',
toolCalls: [
{ id: 'tc1', type: 'function', function: { name: 'bash', arguments: '' } },
{ id: 'tc2', type: 'function', function: { name: 'bash', arguments: '{"command":"ls"}' } },
],
});
cm.addToolResults([{ tool_call_id: 'tc2', content: 'result', success: true }]);
const sanitized = cm.getSanitizedMessages();
// tc1 should be filtered out (empty args), tc2 kept
const assistantMsg = sanitized.find(m => m.role === 'assistant');
expect(assistantMsg?.tool_calls).toHaveLength(1);
expect(assistantMsg?.tool_calls![0].id).toBe('tc2');
});
it('drops assistant message entirely when all tool calls have empty args and no content', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.addAssistantTurn({
content: '',
toolCalls: [{ id: 'tc1', type: 'function', function: { name: 'bash', arguments: '' } }],
});
cm.addUserMessage('next');
const sanitized = cm.getSanitizedMessages();
// The empty assistant message should be dropped
expect(sanitized.find(m => m.role === 'assistant')).toBeUndefined();
expect(sanitized).toHaveLength(1);
expect(sanitized[0].role).toBe('user');
});
it('handles multimodal content blocks in user message', () => {
const cm = new ContextManagerImpl(defaultConfig);
const blocks = [
{ type: 'text' as const, text: 'describe this' },
{ type: 'image_url' as const, image_url: { url: 'data:image/png;base64,abc' } },
];
cm.addUserMessage(blocks);
const msgs = cm.getMessages();
expect(msgs[0].content).toEqual(blocks);
});
it('preserves reasoning_details on assistant turns', () => {
const cm = new ContextManagerImpl(defaultConfig);
cm.addAssistantTurn({
content: 'thought about it',
reasoningDetails: [{ type: 'thinking', text: 'internal reasoning' }],
});
const msgs = cm.getMessages();
expect(msgs[0].reasoning_details).toHaveLength(1);
expect(msgs[0].reasoning_details![0].text).toBe('internal reasoning');
});
});
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