import { assert, assertEquals, assertFalse } from "@std/assert";
import { isValidSlug, slugify } from "../slug.ts";

Deno.test("slugify: lowercases, strips accents, dashes the rest", () => {
  assertEquals(slugify("Hello, World!"), "hello-world");
  assertEquals(slugify("Crème brûlée à Paris"), "creme-brulee-a-paris");
  assertEquals(slugify("  --already--dashed--  "), "already-dashed");
  assertEquals(slugify("日本語"), "untitled");
  assertEquals(slugify(""), "untitled");
  assertEquals(slugify("x".repeat(100)).length, 60);
  // A long title is cut at a word boundary, never left with a hyphen.
  const long = slugify(`${"word ".repeat(12)}tail`);
  assertEquals(long, "word-".repeat(12).slice(0, -1));
  assert(isValidSlug(long));
});

Deno.test("isValidSlug: the format categories, dumps and playlists share", () => {
  assert(isValidSlug("music"));
  assert(isValidSlug("lo-fi-2"));
  for (const bad of ["Music", "-music", "music-", "lo--fi", "lo fi", ""]) {
    assertFalse(isValidSlug(bad), bad);
  }
  assertFalse(isValidSlug("a".repeat(61)));
  assertFalse(isValidSlug("a".repeat(51), 50));
});