vendor Catch2 and ETL

contrib/fsfw_contrib/Catch2-3.7.1/examples/020-TestCase-2.cpp

@@ -0,0 +1,41 @@
+
+//              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
+
+// 020-TestCase-2.cpp
+
+// main() provided by Catch in file 020-TestCase-1.cpp.
+
+#include <catch2/catch_test_macros.hpp>
+
+static int Factorial( int number ) {
+   return number <= 1 ? number : Factorial( number - 1 ) * number;  // fail
+// return number <= 1 ? 1      : Factorial( number - 1 ) * number;  // pass
+}
+
+TEST_CASE( "2: Factorial of 0 is 1 (fail)", "[multi-file:2]" ) {
+    REQUIRE( Factorial(0) == 1 );
+}
+
+TEST_CASE( "2: Factorials of 1 and higher are computed (pass)", "[multi-file:2]" ) {
+    REQUIRE( Factorial(1) == 1 );
+    REQUIRE( Factorial(2) == 2 );
+    REQUIRE( Factorial(3) == 6 );
+    REQUIRE( Factorial(10) == 3628800 );
+}
+
+// Compile: see 020-TestCase-1.cpp
+
+// Expected compact output (all assertions):
+//
+// prompt> 020-TestCase --reporter compact --success
+// 020-TestCase-2.cpp:13: failed: Factorial(0) == 1 for: 0 == 1
+// 020-TestCase-2.cpp:17: passed: Factorial(1) == 1 for: 1 == 1
+// 020-TestCase-2.cpp:18: passed: Factorial(2) == 2 for: 2 == 2
+// 020-TestCase-2.cpp:19: passed: Factorial(3) == 6 for: 6 == 6
+// 020-TestCase-2.cpp:20: passed: Factorial(10) == 3628800 for: 3628800 (0x375f00) == 3628800 (0x375f00)
+// Failed 1 test case, failed 1 assertion.