Tests+LibThreading: Add new tests for LibThreading for detach()

Tests/LibThreading/CMakeLists.txt

@@ -0,0 +1,4 @@
+file(GLOB TEST_SOURCES CONFIGURE_DEPENDS "*.cpp")
+foreach(source ${TEST_SOURCES})
+ serenity_test(${source} LibThreading LIBS LibThreading LibPthread)
+endforeach()

Tests/LibThreading/TestThread.cpp

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2021, Spencer Dixon <[email protected]>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+#include <LibThreading/Thread.h>
+#include <unistd.h>
+
+TEST_CASE(threads_can_detach)
+{
+ int should_be_42 = 0;
+
+ auto thread = Threading::Thread::construct([&should_be_42]() {
+ usleep(10 * 1000);
+ should_be_42 = 42;
+ return 0;
+ });
+ thread->start();
+ thread->detach();
+ usleep(20 * 1000);
+
+ EXPECT(should_be_42 == 42);
+}
+
+TEST_CASE(joining_detached_thread_errors)
+{
+ auto thread = Threading::Thread::construct([]() { return 0; });
+ thread->start();
+ thread->detach();
+
+ EXPECT(thread->join().is_error());
+}