tests: cpp: Extended c++ test case to cover new/delete

Extended c++ test case to cover the zephyr implementation of new and
delete.

Signed-off-by: Jan Van Winkel <jan.van_winkel@dxplore.eu>

tests/application_development/cpp/prj.conf

@@ -2,3 +2,4 @@ CONFIG_CPLUSPLUS=y
 CONFIG_NET_BUF=y
 CONFIG_ZTEST=y
 CONFIG_ZTEST_STACKSIZE=2048
+CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE=128

tests/application_development/cpp/src/main.cpp

@@ -31,6 +31,14 @@
 
 #include <ztest.h>
 
+class foo_class {
+public:
+	foo_class(int foo) : foo(foo) {}
+	int get_foo() const { return foo;}
+private:
+	int foo;
+};
+
 struct foo {
 	int v1;
 };
@@ -49,7 +57,19 @@ static int test_init(struct device *dev)
 
 SYS_INIT(test_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
 
+
+static void test_new_delete(void)
+{
+	foo_class *test_foo = new foo_class(10);
+	zassert_equal(test_foo->get_foo(), 10, NULL);
+	delete test_foo;
+}
+
 void test_main(void)
 {
-	/* Does nothing.  This is a compile only test. */
+	ztest_test_suite(cpp_tests,
+			 ztest_unit_test(test_new_delete)
+		);
+
+	ztest_run_test_suite(cpp_tests);
 }

tests/application_development/cpp/testcase.yaml

@@ -1,5 +1,5 @@
 tests:
   misc.app_dev.cpp:
     arch_exclude: posix
-    build_only: true
+    platform_exclude: qemu_x86_coverage
     tags: cpp