added test for common case

test/kgV/test_kgV.c

@@ -56,3 +56,16 @@ void test_kgVOfBothNumbersZero(){
     //assert
     TEST_ASSERT_EQUAL_INT(expected, result);
 }
+
+void test_kgVOf2And17(){
+    //arrange
+    int a = 2;
+    int b = 17;
+    int expected = 34;
+
+    //act
+    int result = kgV(a, b);
+
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}