71 lines
2.4 KiB
TypeScript
71 lines
2.4 KiB
TypeScript
 
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import { describe, test, expect, vi, afterEach } from 'vitest';
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import {
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installConsoleErrorBuffer,
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getRecentConsoleErrors,
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__resetConsoleErrorBuffer,
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} from './console-buffer';
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afterEach(() => {
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__resetConsoleErrorBuffer();
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vi.restoreAllMocks();
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});
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describe('console error buffer', () => {
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test('captures console.error calls', () => {
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vi.spyOn(console, 'error').mockImplementation(() => {});
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installConsoleErrorBuffer();
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console.error('boom', 42);
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const entries = getRecentConsoleErrors();
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expect(entries).toHaveLength(1);
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expect(entries[0].message).toBe('boom 42');
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expect(typeof entries[0].ts).toBe('number');
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});
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test('always chains to the original console.error', () => {
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const original = vi.spyOn(console, 'error').mockImplementation(() => {});
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installConsoleErrorBuffer();
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console.error('passed through');
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expect(original).toHaveBeenCalledWith('passed through');
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});
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test('retains only the last 20 entries, oldest first', () => {
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vi.spyOn(console, 'error').mockImplementation(() => {});
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installConsoleErrorBuffer();
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for (let i = 0; i < 25; i++) console.error(`e${i}`);
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const entries = getRecentConsoleErrors();
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expect(entries).toHaveLength(20);
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expect(entries[0].message).toBe('e5');
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expect(entries[19].message).toBe('e24');
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});
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test('truncates a long message to 500 characters', () => {
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vi.spyOn(console, 'error').mockImplementation(() => {});
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installConsoleErrorBuffer();
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console.error('x'.repeat(900));
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expect(getRecentConsoleErrors()[0].message).toHaveLength(500);
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});
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test('installing twice does not double-capture', () => {
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vi.spyOn(console, 'error').mockImplementation(() => {});
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installConsoleErrorBuffer();
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installConsoleErrorBuffer();
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console.error('once');
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expect(getRecentConsoleErrors()).toHaveLength(1);
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});
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test('captures window error events', () => {
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installConsoleErrorBuffer();
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window.dispatchEvent(new ErrorEvent('error', { message: 'window blew up' }));
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expect(getRecentConsoleErrors().some((e) => e.message.includes('window blew up'))).toBe(true);
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});
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test('getRecentConsoleErrors returns a copy, not the live array', () => {
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vi.spyOn(console, 'error').mockImplementation(() => {});
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installConsoleErrorBuffer();
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console.error('a');
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const first = getRecentConsoleErrors();
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first.push({ ts: 0, message: 'injected' });
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expect(getRecentConsoleErrors()).toHaveLength(1);
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});
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});
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