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denoland-deno/cli/js/tty_test.ts

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TypeScript

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { test, testPerm, assert } from "./test_util.ts";
// Note tests for Deno.setRaw is in integration tests.
testPerm({ read: true }, function isatty(): void {
// CI not under TTY, so cannot test stdin/stdout/stderr.
const f = Deno.openSync("cli/tests/hello.txt");
assert(!Deno.isatty(f.rid));
f.close();
});
test(function isattyError(): void {
let caught = false;
try {
// Absurdly large rid.
Deno.isatty(0x7fffffff);
} catch (e) {
caught = true;
assert(e instanceof Deno.errors.BadResource);
}
assert(caught);
});