const test = require('node:test');
const assert = require('node:assert/strict');
const { fetchAndExtractPriceViaBrowser } = require('../src/browserScraper');
test('fetchAndExtractPriceViaBrowser extracts a price from the rendered page', async () => {
let closed = false;
const html = '';
const page = {
goto: async () => {},
content: async () => html,
close: async () => { closed = true; },
};
const browser = { newPage: async () => page };
const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
assert.deepEqual(result, { price: 42, method: 'meta', error: null });
assert.equal(closed, true);
});
test('fetchAndExtractPriceViaBrowser returns an error when navigation fails, and still closes the page', async () => {
let closed = false;
const page = {
goto: async () => { throw new Error('Timeout 20000ms exceeded'); },
content: async () => '',
close: async () => { closed = true; },
};
const browser = { newPage: async () => page };
const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
assert.equal(result.price, null);
assert.equal(result.method, null);
assert.ok(result.error instanceof Error);
assert.equal(closed, true);
});
test('fetchAndExtractPriceViaBrowser returns null price when nothing matches, and still closes the page', async () => {
let closed = false;
const page = {
goto: async () => {},
content: async () => 'Geen prijs
',
close: async () => { closed = true; },
};
const browser = { newPage: async () => page };
const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
assert.deepEqual(result, { price: null, method: null, error: null });
assert.equal(closed, true);
});
test('fetchAndExtractPriceViaBrowser closes the page even if reading its content throws', async () => {
let closed = false;
const page = {
goto: async () => {},
content: async () => { throw new Error('content failed'); },
close: async () => { closed = true; },
};
const browser = { newPage: async () => page };
const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
assert.ok(result.error instanceof Error);
assert.equal(closed, true);
});
test('fetchAndExtractPriceViaBrowser passes the timeout option through to page.goto', async () => {
let receivedOptions;
const page = {
goto: async (url, options) => { receivedOptions = options; },
content: async () => '',
close: async () => {},
};
const browser = { newPage: async () => page };
await fetchAndExtractPriceViaBrowser(browser, 'https://example.com', { timeoutMs: 5000 });
assert.equal(receivedOptions.timeout, 5000);
});