fix(ui): unify Ctrl+O expansion hint experience across buffer modes (#21474)

packages/cli/src/ui/components/messages/ToolResultDisplayOverflow.test.tsx

@@ -1,79 +0,0 @@
-/**
- * @license
- * Copyright 2026 Google LLC
- * SPDX-License-Identifier: Apache-2.0
- */
-
-import { describe, it, expect } from 'vitest';
-import { ToolGroupMessage } from './ToolGroupMessage.js';
-import { renderWithProviders } from '../../../test-utils/render.js';
-import { StreamingState, type IndividualToolCallDisplay } from '../../types.js';
-import { waitFor } from '../../../test-utils/async.js';
-import { CoreToolCallStatus } from '@google/gemini-cli-core';
-
-describe('ToolResultDisplay Overflow', () => {
-  it('should display "press ctrl-o" hint when content overflows in ToolGroupMessage', async () => {
-    // Large output that will definitely overflow
-    const lines = [];
-    for (let i = 0; i < 50; i++) {
-      lines.push(`line ${i + 1}`);
-    }
-    const resultDisplay = lines.join('\n');
-
-    const toolCalls: IndividualToolCallDisplay[] = [
-      {
-        callId: 'call-1',
-        name: 'test-tool',
-        description: 'a test tool',
-        status: CoreToolCallStatus.Success,
-        resultDisplay,
-        confirmationDetails: undefined,
-      },
-    ];
-
-    const { lastFrame, waitUntilReady } = renderWithProviders(
-      <ToolGroupMessage
-        item={{ id: 1, type: 'tool_group', tools: toolCalls }}
-        toolCalls={toolCalls}
-        availableTerminalHeight={15} // Small height to force overflow
-        terminalWidth={80}
-        isExpandable={true}
-      />,
-      {
-        uiState: {
-          streamingState: StreamingState.Idle,
-          constrainHeight: true,
-        },
-        useAlternateBuffer: true,
-      },
-    );
-
-    await waitUntilReady();
-
-    // In ASB mode the overflow hint can render before the scroll position
-    // settles. Wait for both the hint and the tail of the content so this
-    // snapshot is deterministic across slower CI runners.
-    await waitFor(() => {
-      const frame = lastFrame();
-      expect(frame).toBeDefined();
-      expect(frame?.toLowerCase()).toContain('press ctrl+o to show more lines');
-      expect(frame).toContain('line 50');
-    });
-
-    const frame = lastFrame();
-    expect(frame).toBeDefined();
-    if (frame) {
-      expect(frame.toLowerCase()).toContain('press ctrl+o to show more lines');
-      // Ensure it's AFTER the bottom border
-      const linesOfOutput = frame.split('\n');
-      const bottomBorderIndex = linesOfOutput.findLastIndex((l) =>
-        l.includes('╰─'),
-      );
-      const hintIndex = linesOfOutput.findIndex((l) =>
-        l.toLowerCase().includes('press ctrl+o to show more lines'),
-      );
-      expect(hintIndex).toBeGreaterThan(bottomBorderIndex);
-      expect(frame).toMatchSnapshot();
-    }
-  });
-});