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node-fetch-cache/test/tests.js

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const fs = require('fs');
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const FormData = require('form-data');
const assert = require('assert');
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const rimraf = require('rimraf');
const path = require('path');
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const FetchCache = require('../index.js');
const { URLSearchParams } = require('url');
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const MemoryCache = require('../classes/caching/memory_cache.js');
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const CACHE_PATH = path.join(__dirname, '..', '.cache');
const expectedPngBuffer = fs.readFileSync(path.join(__dirname, 'expected_png.png'));
const TWO_HUNDRED_URL = 'https://httpbin.org/status/200';
const FOUR_HUNDRED_URL = 'https://httpbin.org/status/400';
const THREE_HUNDRED_TWO_URL = 'https://httpbin.org/status/302';
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const TEXT_BODY_URL = 'https://httpbin.org/robots.txt';
const JSON_BODY_URL = 'https://httpbin.org/json';
const PNG_BODY_URL = 'https://httpbin.org/image/png';
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const TEXT_BODY_EXPECTED = 'User-agent: *\nDisallow: /deny\n';
let fetch;
let res;
let body;
function post(body) {
return { method: 'POST', body };
}
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beforeEach(async function() {
rimraf.sync(CACHE_PATH);
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fetch = FetchCache.withCache(new MemoryCache());
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});
describe('Basic property tests', function() {
it('Has a status property', async function() {
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res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.status, 200);
res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.status, 200);
});
it('Has a statusText property', async function() {
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res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.statusText, 'OK');
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res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.statusText, 'OK');
});
it('Has a url property', async function() {
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res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.url, TWO_HUNDRED_URL);
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res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.url, TWO_HUNDRED_URL);
});
it('Has an ok property', async function() {
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res = await fetch(FOUR_HUNDRED_URL);
assert.strictEqual(res.ok, false);
assert.strictEqual(res.status, 400);
res = await fetch(FOUR_HUNDRED_URL);
assert.strictEqual(res.ok, false);
assert.strictEqual(res.status, 400);
});
it('Has a headers property', async function() {
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res = await fetch(TWO_HUNDRED_URL);
assert.notStrictEqual(res.headers, undefined);
res = await fetch(TWO_HUNDRED_URL);
assert.notStrictEqual(res.headers, undefined);
});
it('Has a redirected property', async function() {
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res = await fetch(THREE_HUNDRED_TWO_URL);
assert.strictEqual(res.redirected, true);
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res = await fetch(THREE_HUNDRED_TWO_URL);
assert.strictEqual(res.redirected, true);
});
}).timeout(10000);
describe('Cache tests', function() {
it('Uses cache', async function() {
res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, true);
});
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it('Can eject from cache', async function() {
res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, true);
await res.ejectFromCache();
res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, true);
});
it('Does not error if rejecting from cache twice', async function() {
res = await fetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, false);
await res.ejectFromCache();
await res.ejectFromCache();
});
it('Gives different string bodies different cache keys', async function() {
res = await fetch(TWO_HUNDRED_URL, post('a'));
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL, post('b'));
assert.strictEqual(res.fromCache, false);
});
it('Gives same string bodies same cache keys', async function() {
res = await fetch(TWO_HUNDRED_URL, post('a'));
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL, post('a'));
assert.strictEqual(res.fromCache, true);
});
it('Gives different URLSearchParams different cache keys', async function() {
res = await fetch(TWO_HUNDRED_URL, post(new URLSearchParams('a=a')));
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL, post(new URLSearchParams('a=b')));
assert.strictEqual(res.fromCache, false);
});
it('Gives same URLSearchParams same cache keys', async function() {
res = await fetch(TWO_HUNDRED_URL, post(new URLSearchParams('a=a')));
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL, post(new URLSearchParams('a=a')));
assert.strictEqual(res.fromCache, true);
});
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it('Gives different read streams different cache keys', async function() {
const s1 = fs.createReadStream(__filename);
const s2 = fs.createReadStream(path.join(__dirname, '..', 'index.js'));
res = await fetch(TWO_HUNDRED_URL, post(s1));
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL, post(s2));
assert.strictEqual(res.fromCache, false);
});
it('Gives the same read streams the same cache key', async function() {
const s1 = fs.createReadStream(__filename);
res = await fetch(TWO_HUNDRED_URL, post(s1));
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL, post(s1));
assert.strictEqual(res.fromCache, true);
});
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it('Gives different form data different cache keys', async function() {
const data1 = new FormData();
data1.append('a', 'a');
const data2 = new FormData();
data2.append('b', 'b');
res = await fetch(TWO_HUNDRED_URL, post(data1));
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL, post(data2));
assert.strictEqual(res.fromCache, false);
});
it('Gives same form data same cache keys', async function() {
const data1 = new FormData();
data1.append('a', 'a');
const data2 = new FormData();
data2.append('a', 'a');
res = await fetch(TWO_HUNDRED_URL, post(data1));
assert.strictEqual(res.fromCache, false);
res = await fetch(TWO_HUNDRED_URL, post(data2));
assert.strictEqual(res.fromCache, true);
});
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}).timeout(10000);
describe('Data tests', function() {
it('Refuses to consume body twice', async function() {
res = await fetch(TEXT_BODY_URL);
await res.text();
try {
await res.text();
throw new Error('The above line should have thrown.');
} catch (err) {
// It threw
}
});
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it('Can get text body', async function() {
res = await fetch(TEXT_BODY_URL);
body = await res.text();
assert.strictEqual(body, TEXT_BODY_EXPECTED);
assert.strictEqual(res.fromCache, false);
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res = await fetch(TEXT_BODY_URL);
body = await res.text();
assert.strictEqual(body, TEXT_BODY_EXPECTED);
assert.strictEqual(res.fromCache, true);
});
it('Can get JSON body', async function() {
res = await fetch(JSON_BODY_URL);
body = await res.json();
assert(body.slideshow);
assert.strictEqual(res.fromCache, false);
res = await fetch(JSON_BODY_URL);
body = await res.json();
assert(body.slideshow);
assert.strictEqual(res.fromCache, true);
});
it('Can get PNG buffer body', async function() {
res = await fetch(PNG_BODY_URL);
body = await res.buffer();
assert.strictEqual(expectedPngBuffer.equals(body), true);
assert.strictEqual(res.fromCache, false);
res = await fetch(PNG_BODY_URL);
body = await res.buffer();
assert.strictEqual(expectedPngBuffer.equals(body), true);
assert.strictEqual(res.fromCache, true);
});
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it('Can stream a body', async function() {
res = await fetch(TEXT_BODY_URL);
body = '';
for await (const chunk of res.body) {
body += chunk.toString();
}
assert.strictEqual(TEXT_BODY_EXPECTED, body);
assert.strictEqual(res.fromCache, false);
res = await fetch(TEXT_BODY_URL);
body = '';
for await (const chunk of res.body) {
body += chunk.toString();
}
assert.strictEqual(TEXT_BODY_EXPECTED, body);
assert.strictEqual(res.fromCache, true);
});
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}).timeout(10000);