tests: CMakeLists.txt: move test names to variable

The intent is to be able to disable some features that get built into the
library. When we do that, we also need to disable some tests.

It's easier when adjusting a variable that contains the list of test names,
versus modifying the list in the foreach() statement.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

tests/CMakeLists.txt

@@ -12,30 +12,32 @@ target_link_libraries(test2Formatted PRIVATE ${PROJECT_NAME})
 
 include_directories(PUBLIC ${CMAKE_SOURCE_DIR})
 
-foreach(TESTNAME
-	test1
-	test2
-	test4
-	testReplaceExisting
-	test_cast
-	test_charcase
-	test_compare
-	test_deep_copy
-	test_double_serializer
-	test_float
-	test_int_add
-	test_json_pointer
-	test_locale
-	test_null
-	test_parse
-	test_parse_int64
-	test_printbuf
-	test_set_serializer
-	test_set_value
-	test_strerror
-	test_util_file
-	test_visit
-	test_object_iterator)
+set(ALL_TEST_NAMES
+    test1
+    test2
+    test4
+    testReplaceExisting
+    test_cast
+    test_charcase
+    test_compare
+    test_deep_copy
+    test_double_serializer
+    test_float
+    test_int_add
+    test_json_pointer
+    test_locale
+    test_null
+    test_parse
+    test_parse_int64
+    test_printbuf
+    test_set_serializer
+    test_set_value
+    test_strerror
+    test_util_file
+    test_visit
+    test_object_iterator)
+
+foreach(TESTNAME ${ALL_TEST_NAMES})
 
 add_executable(${TESTNAME} ${TESTNAME}.c)
 if(${TESTNAME} STREQUAL test_strerror OR ${TESTNAME} STREQUAL test_util_file)