added test for both numbers negative

test/kgV/test_kgV.c

@@ -95,3 +95,16 @@ void test_kgVOfSecondNumberNegative(){
     //assert
     TEST_ASSERT_EQUAL_INT(expected, result);
 }
+
+void test_kgVOfBothNumbersNegative(){
+    //arrange
+    int a = -2;
+    int b = -17;
+    int expected = 34;
+
+    //act
+    int result = kgV(a, b);
+
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}