added test for first number negative and second positive

test/kgV/test_kgV.c

@@ -69,3 +69,16 @@ void test_kgVOf2And17(){
     //assert
     TEST_ASSERT_EQUAL_INT(expected, result);
 }
+
+void test_kgVOfFirstNumberNegative(){
+    //arrange
+    int a = -2;
+    int b = 17;
+    int expected = 34;
+
+    //act
+    int result = kgV(a, b);
+
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}