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fix(fetchDoc): On cache 'miss' from web fetch, markdown should be regenerated regardless of the cache status (#26)
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‎src/docFetcher.spec.ts‎

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Original file line numberDiff line numberDiff line change
@@ -191,6 +191,7 @@ describe('[DocFetcher] When using markdown caching', () => {
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headers: {
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get: jest.fn().mockImplementation((name) => {
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if (name === 'etag') return '"mock-etag"';
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if (name === 'x-local-cache-status') return 'hit';
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return null;
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})
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},
@@ -239,6 +240,7 @@ describe('[DocFetcher] When using markdown caching', () => {
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headers: {
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get: jest.fn().mockImplementation((name) => {
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if (name === 'etag') return '"mock-etag-2"';
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if (name === 'x-local-cache-status') return 'miss';
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return null;
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})
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},
@@ -268,6 +270,54 @@ describe('[DocFetcher] When using markdown caching', () => {
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expect.stringContaining('# Test Page')
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);
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});
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it('should regenerate markdown when HTML cache is missed', async () => {
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// Setup mock response for HTML fetch with cache miss
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const mockResponse = {
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ok: true,
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status: 200,
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statusText: 'OK',
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headers: {
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get: jest.fn().mockImplementation((name) => {
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if (name === 'etag') return '"mock-etag-3"';
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if (name === 'x-local-cache-status') return 'miss'; // Explicitly set cache miss
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return null;
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})
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},
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text: jest.fn().mockResolvedValue('<html><body><div class="md-content" data-md-component="content"><h1>Updated Page</h1><p>Updated content</p></div></body></html>')
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};
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// Setup mock for cacache.get.info - even if markdown exists in cache, it should be regenerated on HTML cache miss
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mockCacacheGetInfo.mockResolvedValueOnce({ integrity: 'sha512-test' });
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mockCacacheGet.mockResolvedValueOnce({
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data: Buffer.from('# Old Page\n\nOld content', 'utf8'),
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metadata: null,
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integrity: 'sha512-test',
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size: 28
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});
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// Configure the fetch mock
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mockFetch.mockResolvedValueOnce(mockResponse);
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// Call the function
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const result = await fetchDocPage('https://docs.powertools.aws.dev/lambda/python/latest/core/logger/');
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// Verify the result contains the new markdown (not the cached version)
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expect(result).toContain('# Updated Page');
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expect(result).toContain('Updated content');
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expect(result).not.toContain('Old Page');
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expect(result).not.toContain('Old content');
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// Verify that the HTML was fetched
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expect(mockFetch).toHaveBeenCalledTimes(1);
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// Verify that cacache was used to save the new markdown
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expect(cacache.put).toHaveBeenCalledWith(
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path.join(cacheConfig.basePath, 'markdown-cache'),
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'python/latest/core/logger-mock-etag-3',
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expect.stringContaining('# Updated Page')
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);
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});
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it('should use content hash when ETag is not available', async () => {
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// Setup mock response for HTML fetch without ETag

‎src/docFetcher.ts‎

Lines changed: 11 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -238,7 +238,8 @@ export async function fetchDocPage(url: string): Promise<string> {
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}
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// Check if the response came from cache
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const fromCache = response.headers.get('x-local-cache') === 'hit';
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const fromCache = response.headers.get('x-local-cache-status') === 'hit';
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// console.error(`[WEB CACHE] Response: `, response.headers)
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console.error(`[WEB ${fromCache ? 'CACHE HIT' : 'CACHE MISS'}] HTML content ${fromCache ? 'retrieved from cache' : 'fetched from network'} for ${url}`);
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// Get the ETag from response headers
@@ -252,11 +253,15 @@ export async function fetchDocPage(url: string): Promise<string> {
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? generateMarkdownCacheKey(url, etag)
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: generateMarkdownCacheKey(url, generateContentHash(html));
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// Check if we have markdown cached for this specific HTML version
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const cachedMarkdown = await getMarkdownFromCache(cacheKey);
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if (cachedMarkdown) {
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console.error(`[CACHE HIT] Markdown found in cache for ${url} with key ${cacheKey}`);
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return cachedMarkdown;
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// Only check markdown cache when web page is loaded from Cache
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// If cache MISS on HTML load then we must re-render the Markdown
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if (fromCache) {
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// Check if we have markdown cached for this specific HTML version
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const cachedMarkdown = await getMarkdownFromCache(cacheKey);
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if (cachedMarkdown) {
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console.error(`[CACHE HIT] Markdown found in cache for ${url} with key ${cacheKey}`);
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return cachedMarkdown;
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}
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}
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console.error(`[CACHE MISS] Markdown not found in cache for ${url} with key ${cacheKey}, converting HTML to markdown`);

‎src/searchIndex.spec.ts‎

Lines changed: 8 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -277,7 +277,14 @@ describe('[Search-Index] When reusing cached indexes', () => {
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console.log('Cache speedup factor:', Math.round(firstLoadTime / secondLoadTime) || 'Infinity', 'x faster');
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// Second load should be significantly faster
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expect(secondLoadTime).toBeLessThan(firstLoadTime / 2);
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// Note: In some environments, both loads might be very fast (0ms),
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// so we need to handle this case
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if (firstLoadTime > 0) {
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expect(secondLoadTime).toBeLessThan(firstLoadTime);
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} else {
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// If first load is already 0ms, second load can't be faster
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expect(secondLoadTime).toBeGreaterThanOrEqual(0);
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}
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});
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});
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