feat: Add exit UI w/ stats (#924)

packages/cli/src/ui/components/Stats.test.tsx

@@ -0,0 +1,78 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { render } from 'ink-testing-library';
+import { describe, it, expect } from 'vitest';
+import {
+  StatRow,
+  StatsColumn,
+  DurationColumn,
+  FormattedStats,
+} from './Stats.js';
+import { Colors } from '../colors.js';
+
+describe('<StatRow />', () => {
+  it('renders a label and value', () => {
+    const { lastFrame } = render(
+      <StatRow label="Test Label" value="Test Value" />,
+    );
+    expect(lastFrame()).toMatchSnapshot();
+  });
+
+  it('renders with a specific value color', () => {
+    const { lastFrame } = render(
+      <StatRow
+        label="Test Label"
+        value="Test Value"
+        valueColor={Colors.AccentGreen}
+      />,
+    );
+    expect(lastFrame()).toMatchSnapshot();
+  });
+});
+
+describe('<StatsColumn />', () => {
+  const mockStats: FormattedStats = {
+    inputTokens: 100,
+    outputTokens: 200,
+    toolUseTokens: 50,
+    thoughtsTokens: 25,
+    cachedTokens: 10,
+    totalTokens: 385,
+  };
+
+  it('renders a stats column with children', () => {
+    const { lastFrame } = render(
+      <StatsColumn title="Test Stats" stats={mockStats}>
+        <StatRow label="Child Prop" value="Child Value" />
+      </StatsColumn>,
+    );
+    expect(lastFrame()).toMatchSnapshot();
+  });
+
+  it('renders a stats column with a specific width', () => {
+    const { lastFrame } = render(
+      <StatsColumn title="Test Stats" stats={mockStats} width="50%" />,
+    );
+    expect(lastFrame()).toMatchSnapshot();
+  });
+
+  it('renders a cumulative stats column with percentages', () => {
+    const { lastFrame } = render(
+      <StatsColumn title="Cumulative Stats" stats={mockStats} isCumulative />,
+    );
+    expect(lastFrame()).toMatchSnapshot();
+  });
+});
+
+describe('<DurationColumn />', () => {
+  it('renders a duration column', () => {
+    const { lastFrame } = render(
+      <DurationColumn apiTime="5s" wallTime="10s" />,
+    );
+    expect(lastFrame()).toMatchSnapshot();
+  });
+});