Prove both detection methods are the same

src/app/oauth-signature.tests.js

@@ -469,4 +469,12 @@ test('Produces the expected decoded signature when optional token not provided',
 		'The generated GET signature should match the expected RFC 3986 encoded signature by default');
 	assert.equal(unencodedSignature, expectedDecodedSignature,
 		'The generated unencoded GET signature should match the expected unencoded signature');
+});
+
+suite('Node or Browser Detection');
+test('Node or Browser properly detected', function () {
+	var oldIsNode = (typeof window === 'undefined');
+	var newIsNode = (typeof module != 'undefined' && typeof module.exports != 'undefined');
+	assert.equal(oldIsNode, newIsNode,
+		'Both methods of detection should produce the same value');
 });