Sjoerd de Vries
5e7d247a16
- Implement extractPrice() to extract price from HTML with three fallback methods: 1. JSON-LD Product schema (json-ld) 2. og:price:amount meta tag (meta) 3. Euro symbol regex pattern (regex) - Implement fetchAndExtractPrice() for fetching URLs and extracting prices - Includes helper functions for parsing and normalizing price values - Add comprehensive test suite with fixtures for each extraction method - All tests passing (14/14) Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013gwc3aCiyQxmCWQke8RvEz
51 lines
2.1 KiB
JavaScript
51 lines
2.1 KiB
JavaScript
const test = require('node:test');
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const assert = require('node:assert/strict');
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const fs = require('node:fs');
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const path = require('node:path');
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const { extractPrice, fetchAndExtractPrice } = require('../src/scraper');
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function loadFixture(name) {
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return fs.readFileSync(path.join(__dirname, 'fixtures', name), 'utf8');
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}
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test('extractPrice reads price from JSON-LD Product offers', () => {
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const result = extractPrice(loadFixture('json-ld.html'));
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assert.deepEqual(result, { price: 19.99, method: 'json-ld' });
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});
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test('extractPrice reads price from og:price:amount meta tag', () => {
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const result = extractPrice(loadFixture('meta-tag.html'));
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assert.deepEqual(result, { price: 24.50, method: 'meta' });
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});
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test('extractPrice falls back to euro-amount regex in page text', () => {
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const result = extractPrice(loadFixture('regex-fallback.html'));
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assert.deepEqual(result, { price: 14.95, method: 'regex' });
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});
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test('extractPrice returns null price when nothing matches', () => {
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const result = extractPrice(loadFixture('no-price.html'));
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assert.deepEqual(result, { price: null, method: null });
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});
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test('fetchAndExtractPrice returns error when fetch rejects', async () => {
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const fetchImpl = async () => { throw new Error('network down'); };
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const result = await fetchAndExtractPrice('https://example.invalid', { fetchImpl });
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assert.equal(result.price, null);
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assert.ok(result.error instanceof Error);
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});
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test('fetchAndExtractPrice returns error on non-OK response', async () => {
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const fetchImpl = async () => ({ ok: false, status: 404, text: async () => '' });
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const result = await fetchAndExtractPrice('https://example.invalid', { fetchImpl });
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assert.equal(result.price, null);
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assert.ok(result.error instanceof Error);
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});
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test('fetchAndExtractPrice extracts price from fetched HTML', async () => {
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const html = loadFixture('meta-tag.html');
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const fetchImpl = async () => ({ ok: true, status: 200, text: async () => html });
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const result = await fetchAndExtractPrice('https://example.invalid', { fetchImpl });
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assert.deepEqual(result, { price: 24.50, method: 'meta', error: null });
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});
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