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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { contentType } from "./content_type.ts";import { assertEquals } from "../testing/asserts.ts";
Deno.test({  name: "media_types - contentType()",  fn() {    const fixtures = [      [".json", "application/json; charset=UTF-8"],      ["text/html", "text/html; charset=UTF-8"],      ["txt", "text/plain; charset=UTF-8"],      ["text/plain; charset=ISO-8859-1", "text/plain; charset=ISO-8859-1"],      ["foo", undefined],      ["file.json", undefined],      ["application/foo", "application/foo"],    ] as const;    for (const [fixture, expected] of fixtures) {      assertEquals(contentType(fixture), expected);    }  },});
Deno.test({  name: "media_types - contentType()",  fn() {    let _str: string;    // For well-known content types, the return type is a string.    // string is assignable to string    _str = contentType(".json");    _str = contentType("text/html");    _str = contentType("txt");
    // @ts-expect-error: string | undefined is not assignable to string    _str = contentType("text/plain; charset=ISO-8859-1");    // @ts-expect-error: string | undefined is not assignable to string    _str = contentType("foo");    // @ts-expect-error: string | undefined is not assignable to string    _str = contentType("file.json");    // @ts-expect-error: string | undefined is not assignable to string    _str = contentType("application/foo");  },});