fix(runtime): disable console color for non tty stdout (#13782)

1 files changed, 14 insertions, 0 deletions

diff --git a/cli/tests/unit/tty_color_test.ts b/cli/tests/unit/tty_color_test.ts
new file mode 100644
index 000000000..d64c278bf
--- /dev/null
+++ b/cli/tests/unit/tty_color_test.ts
@@ -0,0 +1,14 @@
+// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
+import { assertEquals } from "./test_util.ts";
+
+// Note tests for Deno.setRaw is in integration tests.
+
+Deno.test({ permissions: { run: true } }, async function noColorIfNotTty() {
+  const p = Deno.run({
+    cmd: [Deno.execPath(), "eval", "console.log(1)"],
+    stdout: "piped",
+  });
+  const output = new TextDecoder().decode(await p.output());
+  assertEquals(output, "1\n");
+  p.close();
+});