/
tty_test.ts
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/
tty_test.ts
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
// deno-lint-ignore-file no-explicit-any
import { assert } from "../testing/asserts.ts";
import { isatty } from "./tty.ts";
Deno.test("[node/tty isatty] returns true when fd is a tty, false otherwise", () => {
assert(Deno.isatty(Deno.stdin.rid) === isatty(Deno.stdin.rid));
assert(Deno.isatty(Deno.stdout.rid) === isatty(Deno.stdout.rid));
assert(Deno.isatty(Deno.stderr.rid) === isatty(Deno.stderr.rid));
const file = Deno.openSync("README.md");
assert(!isatty(file.rid));
Deno.close(file.rid);
});
Deno.test("[node/tty isatty] returns false for irrelevant values", () => {
// invalid numeric fd
assert(!isatty(1234567));
assert(!isatty(-1));
// invalid type fd
assert(!isatty("abc" as any));
assert(!isatty({} as any));
assert(!isatty([] as any));
assert(!isatty(null as any));
assert(!isatty(undefined as any));
});