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c6302b1 a756421 c6302b1 492326f c6302b1 492326f c6302b1 a756421 c6302b1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | import { describe, expect, it } from "vitest";
import {
avatarColor,
displayName,
formatCount,
formatTweetDate,
isArticleTweet,
isRetweet,
nextTweetDateRefreshDelay,
photoMedia,
quotedTweetUrl,
tokenizeTweetText,
tweetMetrics,
tweetTextHtml,
} from "../src/lib/format.js";
import { pooledTweet } from "./fixtures.js";
const NOW = new Date("2026-07-06T12:00:00.000Z");
describe("tokenizeTweetText", () => {
it("linkifies urls, mentions and hashtags between plain text", () => {
const segments = tokenizeTweetText("Hey @alice check https://example.com/x #ai now");
expect(segments).toEqual([
{ kind: "text", text: "Hey " },
{ kind: "link", text: "@alice", href: "https://x.com/alice" },
{ kind: "text", text: " check " },
{ kind: "link", text: "https://example.com/x", href: "https://example.com/x" },
{ kind: "text", text: " " },
{ kind: "link", text: "#ai", href: "https://x.com/hashtag/ai" },
{ kind: "text", text: " now" },
]);
});
it("returns one plain segment for text without tokens", () => {
expect(tokenizeTweetText("just words")).toEqual([{ kind: "text", text: "just words" }]);
expect(tokenizeTweetText("")).toEqual([]);
});
});
describe("tweetTextHtml", () => {
it("escapes markup and linkifies tokens", () => {
expect(tweetTextHtml('a <b> & "quote" @alice')).toBe(
'a <b> & "quote" <a href="https://x.com/alice" target="_blank" ' +
'rel="noopener noreferrer">@alice</a>',
);
});
it("escapes link text and hrefs", () => {
expect(tweetTextHtml("https://e.com/?a=1&b=2")).toBe(
'<a href="https://e.com/?a=1&b=2" target="_blank" rel="noopener noreferrer">' +
"https://e.com/?a=1&b=2</a>",
);
});
});
describe("formatCount", () => {
it("formats X-style compact counts", () => {
expect(formatCount(0)).toBe("0");
expect(formatCount(999)).toBe("999");
expect(formatCount(1000)).toBe("1K");
expect(formatCount(1234)).toBe("1.2K");
expect(formatCount(87845)).toBe("87.8K");
expect(formatCount(2_500_000)).toBe("2.5M");
});
});
describe("formatTweetDate", () => {
it("uses relative labels within a day and dates beyond", () => {
expect(formatTweetDate("2026-07-06T11:59:30.000Z", NOW)).toBe("now");
expect(formatTweetDate("2026-07-06T11:15:00.000Z", NOW)).toBe("45m");
expect(formatTweetDate("2026-07-06T02:00:00.000Z", NOW)).toBe("10h");
expect(formatTweetDate("2026-05-21T03:04:35.954Z", NOW)).toBe("May 21");
expect(formatTweetDate("2024-12-31T00:00:00.000Z", NOW)).toBe("Dec 31, 2024");
});
it("returns when relative labels need to refresh", () => {
expect(nextTweetDateRefreshDelay("2026-07-06T11:59:30.000Z", NOW)).toBe(30_100);
expect(nextTweetDateRefreshDelay("2026-07-06T11:15:45.000Z", NOW)).toBe(45_100);
expect(nextTweetDateRefreshDelay("2026-07-06T02:30:00.000Z", NOW)).toBe(1_800_100);
expect(nextTweetDateRefreshDelay("2026-05-21T03:04:35.954Z", NOW)).toBeUndefined();
});
});
describe("tweet field helpers", () => {
it("extracts up to four photos with alt text", () => {
const tweet = pooledTweet({
media: [
{ type: "photo", url: "https://pbs/1.jpg", alt_text: "one" },
{ type: "video", url: "https://pbs/skip.mp4" },
{ type: "photo", url: "https://pbs/2.jpg" },
{ type: "photo", url: "https://pbs/3.jpg" },
{ type: "photo", url: "https://pbs/4.jpg" },
{ type: "photo", url: "https://pbs/5.jpg" },
],
});
const photos = photoMedia(tweet);
expect(photos).toHaveLength(4);
expect(photos[0]).toEqual({ url: "https://pbs/1.jpg", alt: "one" });
expect(photos[1]).toEqual({ url: "https://pbs/2.jpg", alt: "Tweet image" });
expect(photoMedia(pooledTweet({ media: "nope" }))).toEqual([]);
});
it("reads metrics with zero defaults", () => {
expect(tweetMetrics(pooledTweet({ metrics: { likes: 7, views: null } }))).toEqual({
replies: 0,
retweets: 0,
likes: 7,
views: 0,
});
expect(tweetMetrics(pooledTweet({ metrics: undefined })).likes).toBe(0);
});
it("derives display name, flags and quote URL", () => {
expect(displayName(pooledTweet())).toBe("Some One");
expect(displayName(pooledTweet({ author: { username: "bare" } }))).toBe("bare");
expect(isArticleTweet(pooledTweet({ is_article: true }))).toBe(true);
expect(isArticleTweet(pooledTweet())).toBe(false);
expect(isRetweet(pooledTweet({ is_retweet: true }))).toBe(true);
expect(quotedTweetUrl(pooledTweet({ quoted_tweet_id: "42" }))).toBe(
"https://x.com/i/status/42",
);
expect(quotedTweetUrl(pooledTweet())).toBeUndefined();
});
it("produces stable avatar colors", () => {
expect(avatarColor("osolmaz")).toBe(avatarColor("osolmaz"));
expect(avatarColor("osolmaz")).toMatch(/^hsl\(\d+ 55% 45%\)$/);
});
});
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