const { assert } = require('chai');
const {
getTitleMetaTag,
getImageMetaTag,
isLinkInWhitelist,
isMediaLinkInWhitelist,
} = require('../../js/modules/link_previews');
describe('Link previews', () => {
describe('#isLinkInWhitelist', () => {
it('returns true for valid links', () => {
assert.strictEqual(isLinkInWhitelist('https://youtube.com/blah'), true);
assert.strictEqual(
isLinkInWhitelist('https://www.youtube.com/blah'),
true
);
assert.strictEqual(isLinkInWhitelist('https://m.youtube.com/blah'), true);
assert.strictEqual(isLinkInWhitelist('https://youtu.be/blah'), true);
assert.strictEqual(isLinkInWhitelist('https://reddit.com/blah'), true);
assert.strictEqual(
isLinkInWhitelist('https://www.reddit.com/blah'),
true
);
assert.strictEqual(isLinkInWhitelist('https://m.reddit.com/blah'), true);
assert.strictEqual(isLinkInWhitelist('https://imgur.com/blah'), true);
assert.strictEqual(isLinkInWhitelist('https://www.imgur.com/blah'), true);
assert.strictEqual(isLinkInWhitelist('https://m.imgur.com/blah'), true);
assert.strictEqual(isLinkInWhitelist('https://instagram.com/blah'), true);
assert.strictEqual(
isLinkInWhitelist('https://www.instagram.com/blah'),
true
);
assert.strictEqual(
isLinkInWhitelist('https://m.instagram.com/blah'),
true
);
});
it('returns false for subdomains', () => {
assert.strictEqual(
isLinkInWhitelist('https://any.subdomain.youtube.com/blah'),
false
);
assert.strictEqual(
isLinkInWhitelist('https://any.subdomain.instagram.com/blah'),
false
);
});
it('returns false for http links', () => {
assert.strictEqual(isLinkInWhitelist('http://instagram.com/blah'), false);
assert.strictEqual(isLinkInWhitelist('http://youtube.com/blah'), false);
});
it('returns false for links with no protocol', () => {
assert.strictEqual(isLinkInWhitelist('instagram.com/blah'), false);
assert.strictEqual(isLinkInWhitelist('youtube.com/blah'), false);
});
it('returns false for link to root path', () => {
assert.strictEqual(isLinkInWhitelist('https://instagram.com'), false);
assert.strictEqual(isLinkInWhitelist('https://youtube.com'), false);
assert.strictEqual(isLinkInWhitelist('https://instagram.com/'), false);
assert.strictEqual(isLinkInWhitelist('https://youtube.com/'), false);
});
it('returns false for other well-known sites', () => {
assert.strictEqual(isLinkInWhitelist('https://facebook.com/blah'), false);
assert.strictEqual(isLinkInWhitelist('https://twitter.com/blah'), false);
});
it('returns false for links that look like our target links', () => {
assert.strictEqual(
isLinkInWhitelist('https://evil.site.com/.instagram.com/blah'),
false
);
assert.strictEqual(
isLinkInWhitelist('https://evil.site.com/.instagram.com/blah'),
false
);
assert.strictEqual(
isLinkInWhitelist('https://sinstagram.com/blah'),
false
);
});
});
describe('#isMediaLinkInWhitelist', () => {
it('returns true for valid links', () => {
assert.strictEqual(
isMediaLinkInWhitelist(
'https://i.ytimg.com/vi/bZHShcCEH3I/hqdefault.jpg'
),
true
);
assert.strictEqual(
isMediaLinkInWhitelist('https://random.cdninstagram.com/blah'),
true
);
assert.strictEqual(
isMediaLinkInWhitelist('https://preview.redd.it/something'),
true
);
assert.strictEqual(
isMediaLinkInWhitelist('https://i.imgur.com/something'),
true
);
});
it('returns false for insecure protocol', () => {
assert.strictEqual(
isMediaLinkInWhitelist(
'http://i.ytimg.com/vi/bZHShcCEH3I/hqdefault.jpg'
),
false
);
assert.strictEqual(
isMediaLinkInWhitelist('http://random.cdninstagram.com/blah'),
false
);
assert.strictEqual(
isMediaLinkInWhitelist('http://preview.redd.it/something'),
false
);
assert.strictEqual(
isMediaLinkInWhitelist('http://i.imgur.com/something'),
false
);
});
it('returns false for other domains', () => {
assert.strictEqual(
isMediaLinkInWhitelist('https://www.youtube.com/something'),
false
);
assert.strictEqual(
isMediaLinkInWhitelist('https://youtu.be/something'),
false
);
assert.strictEqual(
isMediaLinkInWhitelist('https://www.instagram.com/something'),
false
);
assert.strictEqual(
isMediaLinkInWhitelist('https://cnn.com/something'),
false
);
});
});
describe('#_getMetaTag', () => {
it('returns html-decoded tag contents from Youtube', () => {
const youtube = `
`;
assert.strictEqual(
'Randomness is Random - Numberphile',
getTitleMetaTag(youtube)
);
assert.strictEqual(
'https://i.ytimg.com/vi/tP-Ipsat90c/maxresdefault.jpg',
getImageMetaTag(youtube)
);
});
it('returns html-decoded tag contents from Instagram', () => {
const instagram = `
`;
assert.strictEqual(
'Walter "MFPallytime" on Instagram: “Lol gg”',
getTitleMetaTag(instagram)
);
assert.strictEqual(
'https://scontent-lax3-1.cdninstagram.com/vp/1c69aa381c2201720c29a6c28de42ffd/5CD49B5B/t51.2885-15/e35/47690175_2275988962411653_1145978227188801192_n.jpg?_nc_ht=scontent-lax3-1.cdninstagram.com',
getImageMetaTag(instagram)
);
});
it('returns html-decoded tag contents from Instagram', () => {
const imgur = `
`;
assert.strictEqual('', getTitleMetaTag(imgur));
assert.strictEqual(
'https://i.imgur.com/Y3wjlwY.jpg?fb',
getImageMetaTag(imgur)
);
});
it('returns only the first tag', () => {
const html = `
`;
assert.strictEqual('First Second Third', getTitleMetaTag(html));
});
it('handles a newline in attribute value', () => {
const html = `
`;
assert.strictEqual(
'First thing\r\nSecond thing\nThird thing',
getTitleMetaTag(html)
);
});
});
});