1 files changed, 16 insertions, 1 deletions
diff --git a/cli/tests/unit/tty_test.ts b/cli/tests/unit/tty_test.ts
index 116b0dfe9..7e9873791 100644
--- a/cli/tests/unit/tty_test.ts
+++ b/cli/tests/unit/tty_test.ts
@@ -1,8 +1,23 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-import { unitTest, assert } from "./test_util.ts";
+import { unitTest, assert, assertThrows } from "./test_util.ts";
 
 // Note tests for Deno.setRaw is in integration tests.
 
+unitTest({ perms: { read: true } }, function consoleSizeFile(): void {
+  const file = Deno.openSync("cli/tests/hello.txt");
+  assertThrows(() => {
+    Deno.consoleSize(file.rid);
+  }, Error);
+  file.close();
+});
+
+unitTest(function consoleSizeError(): void {
+  assertThrows(() => {
+    // Absurdly large rid.
+    Deno.consoleSize(0x7fffffff);
+  }, Deno.errors.BadResource);
+});
+
 unitTest({ perms: { read: true } }, function isatty(): void {
   // CI not under TTY, so cannot test stdin/stdout/stderr.
   const f = Deno.openSync("cli/tests/hello.txt");