LibTest: Add `EXPECT_NO_CRASH`

Tests/CMakeLists.txt

@@ -14,6 +14,7 @@ add_subdirectory(LibMarkdown)
 add_subdirectory(LibPthread)
 add_subdirectory(LibRegex)
 add_subdirectory(LibSQL)
+add_subdirectory(LibTest)
 add_subdirectory(LibThreading)
 add_subdirectory(LibUnicode)
 add_subdirectory(LibWasm)

Tests/LibTest/CMakeLists.txt

@@ -0,0 +1,7 @@
+set(TEST_SOURCES
+    TestNoCrash.cpp
+)
+
+foreach(source IN LISTS TEST_SOURCES)
+    serenity_test("${source}" LibSQL LIBS LibSQL LibIPC)
+endforeach()

Tests/LibTest/TestNoCrash.cpp

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+
+TEST_CASE(raise)
+{
+    EXPECT_NO_CRASH("This should never crash", [] {
+        return Test::Crash::Failure::DidNotCrash;
+    });
+}

Userland/Libraries/LibTest/CrashTest.cpp

@@ -64,6 +64,8 @@ bool Crash::do_report(Report report)
     bool pass = false;
     if (m_crash_signal == ANY_SIGNAL) {
         pass = report.has<int>();
+    } else if (m_crash_signal == 0) {
+        pass = report.has<Failure>() && report.get<Failure>() == Failure::DidNotCrash;
     } else if (m_crash_signal > 0) {
         pass = report.has<int>() && report.get<int>() == m_crash_signal;
     } else {

Userland/Libraries/LibTest/Macros.h

@@ -134,3 +134,10 @@ void current_test_case_did_fail();
         if (!crash.run())                                         \
             ::Test::current_test_case_did_fail();                 \
     } while (false)
+
+#define EXPECT_NO_CRASH(test_message, test_func)       \
+    do {                                               \
+        Test::Crash crash(test_message, test_func, 0); \
+        if (!crash.run())                              \
+            ::Test::current_test_case_did_fail();      \
+    } while (false)