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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { render } from 'ink-testing-library';
import { describe, it, expect, vi } from 'vitest';
import { StatsDisplay } from './StatsDisplay.js';
import * as SessionContext from '../contexts/SessionContext.js';
import { SessionMetrics } from '../contexts/SessionContext.js';
// Mock the context to provide controlled data for testing
vi.mock('../contexts/SessionContext.js', async (importOriginal) => {
const actual = await importOriginal<typeof SessionContext>();
return {
...actual,
useSessionStats: vi.fn(),
};
});
const useSessionStatsMock = vi.mocked(SessionContext.useSessionStats);
const renderWithMockedStats = (metrics: SessionMetrics) => {
useSessionStatsMock.mockReturnValue({
stats: {
sessionStartTime: new Date(),
metrics,
lastPromptTokenCount: 0,
promptCount: 5,
},
getPromptCount: () => 5,
startNewPrompt: vi.fn(),
});
return render(<StatsDisplay duration="1s" />);
};
describe('<StatsDisplay />', () => {
it('renders only the Performance section in its zero state', () => {
const zeroMetrics: SessionMetrics = {
models: {},
tools: {
totalCalls: 0,
totalSuccess: 0,
totalFail: 0,
totalDurationMs: 0,
totalDecisions: { accept: 0, reject: 0, modify: 0 },
byName: {},
},
};
const { lastFrame } = renderWithMockedStats(zeroMetrics);
const output = lastFrame();
expect(output).toContain('Performance');
expect(output).not.toContain('Interaction Summary');
expect(output).not.toContain('Efficiency & Optimizations');
expect(output).not.toContain('Model'); // The table header
expect(output).toMatchSnapshot();
});
it('renders a table with two models correctly', () => {
const metrics: SessionMetrics = {
models: {
'gemini-2.5-pro': {
api: { totalRequests: 3, totalErrors: 0, totalLatencyMs: 15000 },
tokens: {
prompt: 1000,
candidates: 2000,
total: 43234,
cached: 500,
thoughts: 100,
tool: 50,
},
},
'gemini-2.5-flash': {
api: { totalRequests: 5, totalErrors: 1, totalLatencyMs: 4500 },
tokens: {
prompt: 25000,
candidates: 15000,
total: 150000000,
cached: 10000,
thoughts: 2000,
tool: 1000,
},
},
},
tools: {
totalCalls: 0,
totalSuccess: 0,
totalFail: 0,
totalDurationMs: 0,
totalDecisions: { accept: 0, reject: 0, modify: 0 },
byName: {},
},
};
const { lastFrame } = renderWithMockedStats(metrics);
const output = lastFrame();
expect(output).toContain('gemini-2.5-pro');
expect(output).toContain('gemini-2.5-flash');
expect(output).toContain('1,000');
expect(output).toContain('25,000');
expect(output).toMatchSnapshot();
});
it('renders all sections when all data is present', () => {
const metrics: SessionMetrics = {
models: {
'gemini-2.5-pro': {
api: { totalRequests: 1, totalErrors: 0, totalLatencyMs: 100 },
tokens: {
prompt: 100,
candidates: 100,
total: 250,
cached: 50,
thoughts: 0,
tool: 0,
},
},
},
tools: {
totalCalls: 2,
totalSuccess: 1,
totalFail: 1,
totalDurationMs: 123,
totalDecisions: { accept: 1, reject: 0, modify: 0 },
byName: {
'test-tool': {
count: 2,
success: 1,
fail: 1,
durationMs: 123,
decisions: { accept: 1, reject: 0, modify: 0 },
},
},
},
};
const { lastFrame } = renderWithMockedStats(metrics);
const output = lastFrame();
expect(output).toContain('Performance');
expect(output).toContain('Interaction Summary');
expect(output).toContain('User Agreement');
expect(output).toContain('Savings Highlight');
expect(output).toContain('gemini-2.5-pro');
expect(output).toMatchSnapshot();
});
describe('Conditional Rendering Tests', () => {
it('hides User Agreement when no decisions are made', () => {
const metrics: SessionMetrics = {
models: {},
tools: {
totalCalls: 2,
totalSuccess: 1,
totalFail: 1,
totalDurationMs: 123,
totalDecisions: { accept: 0, reject: 0, modify: 0 }, // No decisions
byName: {
'test-tool': {
count: 2,
success: 1,
fail: 1,
durationMs: 123,
decisions: { accept: 0, reject: 0, modify: 0 },
},
},
},
};
const { lastFrame } = renderWithMockedStats(metrics);
const output = lastFrame();
expect(output).toContain('Interaction Summary');
expect(output).toContain('Success Rate');
expect(output).not.toContain('User Agreement');
expect(output).toMatchSnapshot();
});
it('hides Efficiency section when cache is not used', () => {
const metrics: SessionMetrics = {
models: {
'gemini-2.5-pro': {
api: { totalRequests: 1, totalErrors: 0, totalLatencyMs: 100 },
tokens: {
prompt: 100,
candidates: 100,
total: 200,
cached: 0,
thoughts: 0,
tool: 0,
},
},
},
tools: {
totalCalls: 0,
totalSuccess: 0,
totalFail: 0,
totalDurationMs: 0,
totalDecisions: { accept: 0, reject: 0, modify: 0 },
byName: {},
},
};
const { lastFrame } = renderWithMockedStats(metrics);
const output = lastFrame();
expect(output).not.toContain('Efficiency & Optimizations');
expect(output).toMatchSnapshot();
});
});
describe('Conditional Color Tests', () => {
it('renders success rate in green for high values', () => {
const metrics: SessionMetrics = {
models: {},
tools: {
totalCalls: 10,
totalSuccess: 10,
totalFail: 0,
totalDurationMs: 0,
totalDecisions: { accept: 0, reject: 0, modify: 0 },
byName: {},
},
};
const { lastFrame } = renderWithMockedStats(metrics);
expect(lastFrame()).toMatchSnapshot();
});
it('renders success rate in yellow for medium values', () => {
const metrics: SessionMetrics = {
models: {},
tools: {
totalCalls: 10,
totalSuccess: 9,
totalFail: 1,
totalDurationMs: 0,
totalDecisions: { accept: 0, reject: 0, modify: 0 },
byName: {},
},
};
const { lastFrame } = renderWithMockedStats(metrics);
expect(lastFrame()).toMatchSnapshot();
});
it('renders success rate in red for low values', () => {
const metrics: SessionMetrics = {
models: {},
tools: {
totalCalls: 10,
totalSuccess: 5,
totalFail: 5,
totalDurationMs: 0,
totalDecisions: { accept: 0, reject: 0, modify: 0 },
byName: {},
},
};
const { lastFrame } = renderWithMockedStats(metrics);
expect(lastFrame()).toMatchSnapshot();
});
});
describe('Title Rendering', () => {
const zeroMetrics: SessionMetrics = {
models: {},
tools: {
totalCalls: 0,
totalSuccess: 0,
totalFail: 0,
totalDurationMs: 0,
totalDecisions: { accept: 0, reject: 0, modify: 0 },
byName: {},
},
};
it('renders the default title when no title prop is provided', () => {
const { lastFrame } = renderWithMockedStats(zeroMetrics);
const output = lastFrame();
expect(output).toContain('Session Stats');
expect(output).not.toContain('Agent powering down');
expect(output).toMatchSnapshot();
});
it('renders the custom title when a title prop is provided', () => {
useSessionStatsMock.mockReturnValue({
stats: {
sessionStartTime: new Date(),
metrics: zeroMetrics,
lastPromptTokenCount: 0,
promptCount: 5,
},
getPromptCount: () => 5,
startNewPrompt: vi.fn(),
});
const { lastFrame } = render(
<StatsDisplay duration="1s" title="Agent powering down. Goodbye!" />,
);
const output = lastFrame();
expect(output).toContain('Agent powering down. Goodbye!');
expect(output).not.toContain('Session Stats');
expect(output).toMatchSnapshot();
});
});
});
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