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denoland-deno/cli/tests/unit/tty_test.ts

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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { assert } from "./test_util.ts";
// Note tests for Deno.stdin.setRaw is in integration tests.
Deno.test(function consoleSize() {
if (!Deno.isatty(Deno.stdout.rid)) {
return;
}
const result = Deno.consoleSize();
assert(typeof result.columns !== "undefined");
assert(typeof result.rows !== "undefined");
});
Deno.test({ permissions: { read: true } }, function isatty() {
// CI not under TTY, so cannot test stdin/stdout/stderr.
const f = Deno.openSync("cli/tests/testdata/assets/hello.txt");
assert(!Deno.isatty(f.rid));
f.close();
});
Deno.test(function isattyError() {
let caught = false;
try {
// Absurdly large rid.
Deno.isatty(0x7fffffff);
} catch (e) {
caught = true;
assert(e instanceof Deno.errors.BadResource);
}
assert(caught);
});