added tests for zero cases

test/kgV/test_kgV.c

@@ -1,5 +1,6 @@
 #include "unity.h"
 #include "kgV.h"
+#include "ggT.h"
 
 void setUp(void){}
 void tearDown(void){}
@@ -13,5 +14,45 @@ void test_kgV8And6(void) {
     //act
     int result = kgV(a, b);
 
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}
+
+void test_kgVOfFirstNumberZero(){
+    //arrange
+    int a = 0;
+    int b = 5;
+    int expected = 0;
+
+    //act
+    int result = kgV(a, b);
+
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}
+
+void test_kgVOfSecondNumberZero(){
+    //arrange
+    int a = 5;
+    int b = 0;
+    int expected = 0;
+
+    //act
+    int result = kgV(a, b);
+
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}
+
+void test_kgVOfBothNumbersZero(){
+    //arrange
+    int a = 0;
+    int b = 0;
+    int expected = 0;
+
+    //act
+    int result = kgV(a, b);
+
+    //assert
     TEST_ASSERT_EQUAL_INT(expected, result);
 }