/**
* Edge case tests for ResponseModeSystem - critical scenarios for production stability
*/
import { describe, it, expect, beforeEach, vi } from 'vitest';
import { ResponseModeSystem, ResponseMode, ResponseContent } from '../../../src/utils/ResponseModeSystem.js';
describe('ResponseModeSystem Edge Cases', () => {
beforeEach(() => {
ResponseModeSystem.clearCache();
});
describe('Memory management and cache behavior', () => {
it('should handle cache overflow gracefully', () => {
// Fill cache beyond typical capacity
for (let i = 0; i < 200; i++) {
ResponseModeSystem.createSummary(`Content ${i}`.repeat(100), `key-${i}`);
}
// Verify cache still functions correctly
const content = 'A'.repeat(1000);
const result = ResponseModeSystem.createSummary(content, 'test-key');
expect(result.length).toBeLessThanOrEqual(500);
expect(result).toBe('A'.repeat(497) + '...');
// Verify cache statistics are available
const stats = ResponseModeSystem.getCacheStats();
expect(stats.summary.size).toBeGreaterThan(0);
expect(stats.summary.hitRate).toBeGreaterThanOrEqual(0);
});
it('should handle concurrent cache access safely', async () => {
const content = 'B'.repeat(2000);
const promises = [];
// Create multiple concurrent requests for same cache key
for (let i = 0; i < 50; i++) {
promises.push(
Promise.resolve(ResponseModeSystem.createPreview(content, 'concurrent-key'))
);
}
const results = await Promise.all(promises);
// All results should be identical
const firstResult = results[0];
expect(firstResult.length).toBeLessThanOrEqual(2000);
results.forEach(result => {
expect(result).toBe(firstResult);
});
});
it('should handle cache key collisions gracefully', () => {
const content1 = 'Content type 1';
const content2 = 'Content type 2';
const sameKey = 'collision-key';
// First content cached
const result1 = ResponseModeSystem.createSummary(content1, sameKey);
expect(result1).toBe(content1);
// Second call with same key should return cached value (content1)
const result2 = ResponseModeSystem.createSummary(content2, sameKey);
expect(result2).toBe(content1); // Should return cached result
});
});
describe('Extreme content scenarios', () => {
it('should handle extremely large content efficiently', () => {
const hugeContent = 'X'.repeat(1000000); // 1MB content
const start = performance.now();
const summary = ResponseModeSystem.createSummary(hugeContent);
const end = performance.now();
expect(summary.length).toBe(500);
expect(summary).toBe('X'.repeat(497) + '...');
expect(end - start).toBeLessThan(100); // Should be fast
});
it('should handle empty content', () => {
const content: ResponseContent = { full: '' };
expect(ResponseModeSystem.processContent(content, 'full')).toBe('');
expect(ResponseModeSystem.processContent(content, 'preview')).toBe('');
expect(ResponseModeSystem.processContent(content, 'summary')).toBe('');
});
it('should handle content with only whitespace', () => {
const whitespaceContent = ' \n\t \n ';
const content: ResponseContent = { full: whitespaceContent };
expect(ResponseModeSystem.processContent(content, 'full')).toBe(whitespaceContent);
expect(ResponseModeSystem.processContent(content, 'preview')).toBe(whitespaceContent);
expect(ResponseModeSystem.processContent(content, 'summary')).toBe(whitespaceContent);
});
it('should handle content with special Unicode characters', () => {
const unicodeContent = '🎉 Hello 世界 💻 Emoji test with special chars àáâãäå çñü';
const longUnicode = unicodeContent.repeat(20); // Make it long enough to truncate
const summary = ResponseModeSystem.createSummary(longUnicode);
expect(summary.length).toBeLessThanOrEqual(500);
expect(summary).toContain('🎉');
expect(summary).toContain('世界');
});
it('should handle content exactly at boundaries', () => {
// Exactly 500 chars for summary
const exactSummaryLength = 'A'.repeat(500);
const summary = ResponseModeSystem.createSummary(exactSummaryLength);
expect(summary).toBe(exactSummaryLength);
expect(summary.length).toBe(500);
// Exactly 2000 chars for preview
const exactPreviewLength = 'B'.repeat(2000);
const preview = ResponseModeSystem.createPreview(exactPreviewLength);
expect(preview).toBe(exactPreviewLength);
expect(preview.length).toBe(2000);
// One char over boundaries
const oneTooLongSummary = 'C'.repeat(501);
const truncatedSummary = ResponseModeSystem.createSummary(oneTooLongSummary);
expect(truncatedSummary.length).toBe(500);
expect(truncatedSummary).toBe('C'.repeat(497) + '...');
});
});
describe('Invalid input handling', () => {
it('should handle malformed URIs gracefully', () => {
// Test various malformed URI scenarios
expect(ResponseModeSystem.extractModeFromUri('not-a-uri')).toBe('summary');
expect(ResponseModeSystem.extractModeFromUri('')).toBe('summary');
expect(ResponseModeSystem.extractModeFromUri('vault://')).toBe('summary');
expect(ResponseModeSystem.extractModeFromUri('vault://test?')).toBe('summary');
expect(ResponseModeSystem.extractModeFromUri('vault://test?mode=')).toBe('summary');
});
it('should handle null/undefined content objects', () => {
const nullContent = null as unknown as ResponseContent;
const undefinedContent = undefined as unknown as ResponseContent;
// Should not throw, though results may be undefined behavior
expect(() => ResponseModeSystem.processContent(nullContent, 'summary')).not.toThrow();
expect(() => ResponseModeSystem.processContent(undefinedContent, 'preview')).not.toThrow();
});
it('should handle content with missing full property', () => {
const incompleteContent = {
summary: 'Has summary',
preview: 'Has preview'
// missing 'full' property
} as ResponseContent;
// Should gracefully handle missing full content
expect(() => ResponseModeSystem.processContent(incompleteContent, 'full')).not.toThrow();
expect(() => ResponseModeSystem.processContent(incompleteContent, 'summary')).not.toThrow();
});
it('should handle extremely long cache keys', () => {
const longKey = 'key-'.repeat(1000); // Very long cache key
const content = 'test content';
// Should handle without errors
expect(() => ResponseModeSystem.createSummary(content, longKey)).not.toThrow();
expect(() => ResponseModeSystem.createPreview(content, longKey)).not.toThrow();
});
});
describe('Concurrent operations', () => {
it('should handle rapid sequential calls without race conditions', () => {
const results = [];
const content = 'Test content for sequential calls';
// Rapid sequential calls
for (let i = 0; i < 100; i++) {
results.push(ResponseModeSystem.createSummary(content, `key-${i}`));
}
// All results should be consistent
results.forEach(result => {
expect(result).toBe(content);
});
});
it('should maintain cache consistency under load', async () => {
const content = 'Cache consistency test content';
const cacheKey = 'consistency-key';
// Multiple operations on same cache key
const operations = [
() => ResponseModeSystem.createSummary(content, cacheKey),
() => ResponseModeSystem.createPreview(content, cacheKey),
() => ResponseModeSystem.getCacheStats(),
() => ResponseModeSystem.createSummary(content, cacheKey + '2'),
() => ResponseModeSystem.clearCache(),
() => ResponseModeSystem.createSummary(content, cacheKey)
];
// Execute all operations - should not throw
operations.forEach(op => {
expect(() => op()).not.toThrow();
});
});
});
describe('Error recovery', () => {
it('should recover from cache corruption gracefully', () => {
// Simulate cache corruption by accessing private cache directly
const cache = (ResponseModeSystem as any).summaryCache;
// Create normal cached entry
ResponseModeSystem.createSummary('test content', 'normal-key');
// Simulate corruption by setting invalid cache entry
if (cache && cache.set) {
cache.set('corrupted-key', null);
cache.set('corrupted-key-2', undefined);
}
// Should still work for new entries
const result = ResponseModeSystem.createSummary('new content', 'new-key');
expect(result).toBe('new content');
// Should handle corrupted entries gracefully
const corruptedResult = ResponseModeSystem.createSummary('fallback content', 'corrupted-key');
expect(corruptedResult).toBe('fallback content');
});
it('should handle memory pressure scenarios', () => {
// Fill up cache with large entries
for (let i = 0; i < 1000; i++) {
const largeContent = `Large content ${i} `.repeat(100);
ResponseModeSystem.createSummary(largeContent, `large-${i}`);
ResponseModeSystem.createPreview(largeContent, `large-preview-${i}`);
}
// Should still function correctly
const testContent = 'Test content after memory pressure';
const result = ResponseModeSystem.createSummary(testContent);
expect(result).toBe(testContent);
// Cache should still provide statistics
const stats = ResponseModeSystem.getCacheStats();
expect(typeof stats.summary.size).toBe('number');
expect(typeof stats.preview.size).toBe('number');
});
});
describe('Mode parameter edge cases', () => {
it('should handle case-sensitive mode parameters', () => {
expect(ResponseModeSystem.parseMode('SUMMARY')).toBe('summary');
expect(ResponseModeSystem.parseMode('Summary')).toBe('summary');
expect(ResponseModeSystem.parseMode('PREVIEW')).toBe('summary'); // Should default for invalid
expect(ResponseModeSystem.parseMode('Preview')).toBe('summary'); // Should default for invalid
});
it('should handle mode parameters with extra whitespace', () => {
expect(ResponseModeSystem.parseMode(' summary ')).toBe('summary'); // Should default for invalid
expect(ResponseModeSystem.parseMode('\tsummary\n')).toBe('summary'); // Should default for invalid
expect(ResponseModeSystem.parseMode('summary\0')).toBe('summary'); // Should default for invalid
});
it('should handle numerical and special character mode parameters', () => {
expect(ResponseModeSystem.parseMode('123')).toBe('summary');
expect(ResponseModeSystem.parseMode('mode-1')).toBe('summary');
expect(ResponseModeSystem.parseMode('summary!')).toBe('summary');
expect(ResponseModeSystem.parseMode('sümmary')).toBe('summary');
});
});
});
