1 files changed, 77 insertions, 0 deletions
diff --git a/tests/ExtraTests/X20-AssertionStartingEventGoesBeforeAssertionIsEvaluated.cpp b/tests/ExtraTests/X20-AssertionStartingEventGoesBeforeAssertionIsEvaluated.cpp
new file mode 100644
index 0000000..6f44bf6
--- /dev/null
+++ b/tests/ExtraTests/X20-AssertionStartingEventGoesBeforeAssertionIsEvaluated.cpp
@@ -0,0 +1,77 @@
+
+//              Copyright Catch2 Authors
+// Distributed under the Boost Software License, Version 1.0.
+//   (See accompanying file LICENSE.txt or copy at
+//        https://www.boost.org/LICENSE_1_0.txt)
+
+// SPDX-License-Identifier: BSL-1.0
+
+/**\file
+ * Registers an event listener to increments counter of assertionStarting events.
+ *
+ * Different assertion macros then check that the counter is at expected
+ * value when they are evaluated.
+ */
+
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/reporters/catch_reporter_event_listener.hpp>
+#include <catch2/reporters/catch_reporter_registrars.hpp>
+#include <catch2/matchers/catch_matchers_predicate.hpp>
+
+namespace {
+
+    static size_t assertion_starting_events_seen = 0;
+
+    class AssertionStartingListener : public Catch::EventListenerBase {
+    public:
+        AssertionStartingListener( Catch::IConfig const* config ):
+            EventListenerBase( config ) {}
+
+        void assertionStarting( Catch::AssertionInfo const& ) override {
+            ++assertion_starting_events_seen;
+        }
+    };
+
+    static bool f1() {
+        return assertion_starting_events_seen == 1;
+    }
+
+    static void f2() {
+        if ( assertion_starting_events_seen != 2 ) { throw 1; }
+    }
+
+    static void f3() {
+        if ( assertion_starting_events_seen == 3 ) { throw 1; }
+    }
+
+    static bool f4() { return assertion_starting_events_seen == 4; }
+
+    static void f5() { throw assertion_starting_events_seen; }
+
+} // anonymous namespace
+
+CATCH_REGISTER_LISTENER( AssertionStartingListener )
+
+TEST_CASE() {
+    // **IMPORTANT**
+    // The order of assertions below matters.
+    REQUIRE( f1() );
+    REQUIRE_NOTHROW( f2() );
+    REQUIRE_THROWS( f3() );
+    REQUIRE_THAT( f4(),
+                  Catch::Matchers::Predicate<bool>( []( bool b ) { return b; } ) );
+    REQUIRE_THROWS_MATCHES(
+        f5(), size_t, Catch::Matchers::Predicate<size_t>( []( size_t i ) {
+            return i == 5;
+        } ) );
+
+    CAPTURE( assertion_starting_events_seen ); // **not** an assertion
+    INFO( "some info msg" );                   // **not** an assertion
+    WARN( "warning! warning!" );               // assertion-like message
+    SUCCEED();                                 // assertion-like message
+
+    // We skip FAIL/SKIP and so on, which fail the test.
+
+    // This require will also increment the count once
+    REQUIRE( assertion_starting_events_seen == 8 );
+}