test: fix Valgrind leaks in AllocationLogTest and drop HelloGTest

- free malloc'd pointers and rows at the end of each AllocationLogTest
  case (reported as definitely lost by the CI memcheck job)
- remove the HelloGTest placeholder test and its CMake registration

Signed-off-by: Herbert Rocha <herberthb12@gmail.com>

Author: hbgit

tests/unit/CMakeLists.txt

@@ -3,8 +3,4 @@ function(map2check_test EXECUTABLE)
   add_test(NAME ${EXECUTABLE} COMMAND ${EXECUTABLE})
 endfunction(map2check_test)
 
-add_executable(HelloGTest
-    HelloGTest.cpp
-)
-map2check_test(HelloGTest)
 add_subdirectory(backend-library)

tests/unit/HelloGTest.cpp

@@ -66,6 +66,7 @@ TEST_F(AllocationLogTest, IfAddressIsNotReleasedThenAllocationLogIsInvalid) {
   mark_allocation_log(&container, (long)a);
   long actual = valid_allocation_log(&container);
   EXPECT_NE(actual, 0);
+  free(a);
 }
 
 TEST_F(AllocationLogTest, AddressIsInAllocationLog) {
@@ -78,6 +79,8 @@ TEST_F(AllocationLogTest, AddressIsInAllocationLog) {
   append_element(&container, row);
   long actual = is_valid_allocation_address(&container, ptr, 4);
   EXPECT_NE(actual, 0);
+  free(ptr);
+  free(row);
 }
 
 TEST_F(AllocationLogTest, AddressIsNotInAllocationLog) {
@@ -90,4 +93,6 @@ TEST_F(AllocationLogTest, AddressIsNotInAllocationLog) {
   append_element(&container, row);
   long actual = is_valid_allocation_address(&container, ptr, size * 2);
   EXPECT_EQ(actual, 0);
+  free(ptr);
+  free(row);
 }