Import of the watch repository from Pebble

tests/test_infra/test_test_infra.c

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "clar.h"
+
+int default_only_define(void);
+int overridden_define(void);
+int custom_only_define(void);
+
+void test_test_infra__default_override_header(void) {
+  // Check that the header in the default override directory was included.
+  cl_assert(default_only_define());
+}
+
+void test_test_infra__overridden_custom_header(void) {
+  // Check that the header in the custom override directory shadowed the default
+  // override directory's version.
+  cl_assert(overridden_define() == 42);
+}
+
+void test_test_infra__custom_only_header(void) {
+  // Check that the header only in the custom override directory was included.
+  cl_assert(custom_only_define());
+}