Tests: Add test for raise

Tests/LibC/CMakeLists.txt

@@ -11,6 +11,7 @@ set(TEST_SOURCES
     TestLibCTime.cpp
     TestMemmem.cpp
     TestQsort.cpp
+    TestRaise.cpp
     TestRealpath.cpp
     TestScanf.cpp
     TestSearch.cpp

Tests/LibC/TestRaise.cpp

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+
+#include <signal.h>
+
+TEST_CASE(raise)
+{
+    EXPECT_CRASH("This should raise a SIGUSR1 signal", [] {
+        raise(SIGUSR1);
+        return Test::Crash::Failure::DidNotCrash;
+    });
+}