A bunch of Catch::toString tests

projects/SelfTest/ToStringWhich.cpp

@@ -0,0 +1,74 @@
+#include "catch.hpp"
+/*
+    Demonstrate which version of toString/StringMaker is being used
+    for various types
+*/
+
+
+struct has_toString { };
+struct has_maker {};
+struct has_maker_and_toString {};
+
+namespace Catch {
+    std::string toString( const has_toString& ) {
+        return "toString( has_toString )";
+    }
+    std::string toString( const has_maker_and_toString& ) {
+        return "toString( has_maker_and_toString )";
+    }
+    template<>
+    struct StringMaker<has_maker> {
+        static std::string convert( const has_maker& ) {
+            return "StringMaker<has_maker>";
+        }
+    };
+    template<>
+    struct StringMaker<has_maker_and_toString> {
+        static std::string convert( const has_maker_and_toString& ) {
+            return "StringMaker<has_maker_and_toString>";
+        }
+    };
+}
+
+// Call the overload
+TEST_CASE( "toString( has_toString )", "[toString]" )
+{
+    has_toString item;
+    REQUIRE( Catch::toString( item ) == "toString( has_toString )" );
+}
+
+// Call the overload
+TEST_CASE( "toString( has_maker )", "[toString]" )
+{
+    has_maker item;
+    REQUIRE( Catch::toString( item ) == "StringMaker<has_maker>" );
+}
+
+// Call the overload
+TEST_CASE( "toString( has_maker_and_toString )", "[toString]" )
+{
+    has_maker_and_toString item;
+    REQUIRE( Catch::toString( item ) == "toString( has_maker_and_toString )" );
+}
+
+// Vectors...
+TEST_CASE( "toString( vectors<has_toString )", "[toString]" )
+{
+    std::vector<has_toString> v(1);
+    // This invokes template<T> toString which actually gives us '{ ? }'
+    REQUIRE( Catch::toString( v ) == "{ {?} }" );
+}
+
+TEST_CASE( "toString( vectors<has_maker )", "[toString]" )
+{
+    std::vector<has_maker> v(1);
+    REQUIRE( Catch::toString( v ) == "{ StringMaker<has_maker> }" );
+}
+
+
+TEST_CASE( "toString( vectors<has_maker_and_toString )", "[toString]" )
+{
+    std::vector<has_maker_and_toString> v(1);
+    // Note: This invokes the template<T> toString -> StringMaker
+    REQUIRE( Catch::toString( v ) == "{ StringMaker<has_maker_and_toString> }" );
+}