1 files changed, 33 insertions, 0 deletions
diff --git a/std/flags/default_bool_test.ts b/std/flags/default_bool_test.ts
new file mode 100755
index 000000000..dc953cdc8
--- /dev/null
+++ b/std/flags/default_bool_test.ts
@@ -0,0 +1,33 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { test } from "../testing/mod.ts";
+import { assertEquals } from "../testing/asserts.ts";
+import { parse } from "./mod.ts";
+
+test(function booleanDefaultTrue(): void {
+  const argv = parse([], {
+    boolean: "sometrue",
+    default: { sometrue: true }
+  });
+  assertEquals(argv.sometrue, true);
+});
+
+test(function booleanDefaultFalse(): void {
+  const argv = parse([], {
+    boolean: "somefalse",
+    default: { somefalse: false }
+  });
+  assertEquals(argv.somefalse, false);
+});
+
+test(function booleanDefaultNull(): void {
+  const argv = parse([], {
+    boolean: "maybe",
+    default: { maybe: null }
+  });
+  assertEquals(argv.maybe, null);
+  const argv2 = parse(["--maybe"], {
+    boolean: "maybe",
+    default: { maybe: null }
+  });
+  assertEquals(argv2.maybe, true);
+});