fix UT which is broken by incorrect patch

test/bthread_execution_queue_unittest.cpp

@@ -589,7 +589,7 @@ TEST_F(ExecutionQueueTest, random_cancel) {
     int64_t expected = 0;
     for (int i = 0; i < 100000; ++i) {
         bthread::TaskHandle h;
-        AddTask t = {0};
+        AddTask t;
         t.value = i;
         t.cancel_task = false;
         ASSERT_EQ(0, bthread::execution_queue_execute(queue_id, t, NULL, &h));

test/bthread_unittest.cpp

@@ -506,21 +506,16 @@ TEST_F(BthreadTest, too_many_nosignal_threads) {
         ASSERT_EQ(0, bthread_start_urgent(&tid, &attr, dummy_thread, NULL));
     }
 }
-} // namespace
-
-int main(int argc, char** argv) {
-    testing::InitGoogleTest(&argc, argv);
-    GFLAGS_NS::ParseCommandLineFlags(&argc, &argv, true);
-    return RUN_ALL_TESTS();
-}
 
-void* yield_thread(void*) {
+static void* yield_thread(void*) {
     bthread_yield();
     return NULL;
 }
 
-TEST_F(test_bthread_suite, yield_single_thread) {
+TEST_F(BthreadTest, yield_single_thread) {
     bthread_t tid;
     ASSERT_EQ(0, bthread_start_background(&tid, NULL, yield_thread, NULL));
     ASSERT_EQ(0, bthread_join(tid, NULL));
 }
+
+} // namespace