std/internal/styles_test.ts

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "@std/assert";
import * as c from "./styles.ts";

Deno.test("red() single color", function () {
  assertEquals(c.red("foo bar"), "foo bar");
});

Deno.test("red() replaces close characters", function () {
  assertEquals(c.red("Hello"), "Hello");
});

Deno.test("getColorEnabled() handles enabled colors", function () {
  assertEquals(c.red("foo bar"), "foo bar");
});

Deno.test("bold()", function () {
  assertEquals(c.bold("foo bar"), "foo bar");
});

Deno.test("red()", function () {
  assertEquals(c.red("foo bar"), "foo bar");
});

Deno.test("green()", function () {
  assertEquals(c.green("foo bar"), "foo bar");
});

Deno.test("white()", function () {
  assertEquals(c.white("foo bar"), "foo bar");
});

Deno.test("gray()", function () {
  assertEquals(c.gray("foo bar"), "foo bar");
});

Deno.test("bgRed()", function () {
  assertEquals(c.bgRed("foo bar"), "foo bar");
});

Deno.test("bgGreen()", function () {
  assertEquals(c.bgGreen("foo bar"), "foo bar");
});

// https://github.com/chalk/strip-ansi/blob/2b8c961e75760059699373f9a69101065c3ded3a/test.js#L4-L6
Deno.test("stripAnsiCode()", function () {
  assertEquals(
    c.stripAnsiCode(
      "\u001B[0m\u001B[4m\u001B[42m\u001B[31mfoo\u001B[39m\u001B[49m\u001B[24mfoo\u001B[0m",
    ),
    "foofoo",
  );
});

Deno.test("noColor", async function () {
  const fixtures = [
    ["true", "foo bar\n"],
    ["1", "foo bar\n"],
    ["", "foo bar\n"],
  ] as const;

  const code = `
    import * as c from "${import.meta.resolve("./styles.ts")}";
    console.log(c.red("foo bar"));
  `;

  for await (const [fixture, expected] of fixtures) {
    const command = new Deno.Command(Deno.execPath(), {
      args: ["eval", "--no-lock", code],
      clearEnv: true,
      env: {
        NO_COLOR: fixture,
      },
    });
    const { stdout } = await command.output();
    const decoder = new TextDecoder();
    const output = decoder.decode(stdout);
    assertEquals(output, expected);
  }
});