Fix unit tests for the exporting engine (#7784)

CMakeLists.txt

@@ -969,6 +969,7 @@ if(BUILD_TESTING)
         -Wl,--wrap=notify_workers
         -Wl,--wrap=send_internal_metrics
         -Wl,--wrap=now_realtime_sec
+        -Wl,--wrap=uv_thread_set_name_np
         -Wl,--wrap=uv_thread_create
         -Wl,--wrap=uv_mutex_lock
         -Wl,--wrap=uv_mutex_unlock

Makefile.am

@@ -790,6 +790,7 @@ if ENABLE_UNITTESTS
         -Wl,--wrap=notify_workers \
         -Wl,--wrap=send_internal_metrics \
         -Wl,--wrap=now_realtime_sec \
+        -Wl,--wrap=uv_thread_set_name_np \
         -Wl,--wrap=uv_thread_create \
         -Wl,--wrap=uv_mutex_lock \
         -Wl,--wrap=uv_mutex_unlock \

exporting/tests/netdata_doubles.c

@@ -17,6 +17,14 @@ time_t __wrap_now_realtime_sec(void)
     return mock_type(time_t);
 }
 
+void __wrap_uv_thread_set_name_np(uv_thread_t ut, const char* name)
+{
+    (void)ut;
+    (void)name;
+
+    function_called();
+}
+
 void __wrap_info_int(const char *file, const char *function, const unsigned long line, const char *fmt, ...)
 {
     (void)file;

exporting/tests/test_exporting_engine.c

@@ -25,6 +25,8 @@ void init_connectors_in_tests(struct engine *engine)
     expect_value(__wrap_uv_thread_create, worker, simple_connector_worker);
     expect_value(__wrap_uv_thread_create, arg, engine->connector_root->instance_root);
 
+    expect_function_call(__wrap_uv_thread_set_name_np);
+
     assert_int_equal(__real_init_connectors(engine), 0);
 
     assert_int_equal(engine->now, 2);