tests: userspace: add a test for code coverage

Add a test case for getting all the kernel objects in
kobject list.

Signed-off-by: Lixin Guo <[email protected]>

Author: LixinGuoX

tests/kernel/mem_protect/mem_protect/src/kobject.c

@@ -1366,3 +1366,32 @@ void test_kobject_perm_error(void)
 		k_thread_join(tid, K_FOREVER);
 	}
 }
+
+extern const char *otype_to_str(enum k_objects otype);
+
+/**
+ * @brief Test get all kernel object list
+ *
+ * @details Get all of the kernel object in kobject list.
+ *
+ * @ingroup kernel_memprotect_tests
+ */
+void test_all_kobjects_str(void)
+{
+	enum k_objects otype = K_OBJ_ANY;
+	const char *c;
+	int  cmp;
+
+	do {
+		c = otype_to_str(otype);
+		cmp = strcmp(c, "?");
+		if (otype != K_OBJ_LAST) {
+			zassert_true(cmp != 0,
+				"otype %d unexpectedly maps to last entry \"?\"", otype);
+		} else {
+			zassert_true(cmp == 0,
+				"otype %d does not map to last entry \"?\"", otype);
+		}
+		otype++;
+	} while (otype <= K_OBJ_LAST);
+}

tests/kernel/mem_protect/mem_protect/src/main.c

@@ -86,7 +86,8 @@ void test_main(void)
 		ztest_unit_test(test_thread_alloc_out_of_idx),
 		ztest_unit_test(test_kobj_create_out_of_memory),
 		ztest_unit_test(test_kobject_perm_error),
-		ztest_unit_test(test_kobject_free_error)
+		ztest_unit_test(test_kobject_free_error),
+		ztest_unit_test(test_all_kobjects_str)
 		);
 
 	ztest_run_test_suite(memory_protection_test_suite);

tests/kernel/mem_protect/mem_protect/src/mem_protect.h

@@ -70,6 +70,7 @@ extern void test_kobj_create_out_of_memory(void);
 extern void test_thread_alloc_out_of_idx(void);
 extern void test_alloc_kobjects(void);
 extern void test_kobject_perm_error(void);
+extern void test_all_kobjects_str(void);
 
 
 /* Flag needed to figure out if the fault was expected or not. */