further testing with invalid input

test/test_input.c

@@ -53,4 +53,8 @@ void test_testn(void){
   TEST_ASSERT_EQUAL_CHAR('n', result);
 }
 
+void test_testg(void){
+  char result = getTInput('g');
+  TEST_ASSERT_EQUAL_CHAR('n', result);
+}