Merge pull request #318 from PureAbstract/enum_to_string

Enum to string (for #317)

1 files changed, 71 insertions, 0 deletions

diff --git a/projects/SelfTest/EnumToString.cpp b/projects/SelfTest/EnumToString.cpp
new file mode 100644
index 00000000..53738028
--- /dev/null
+++ b/projects/SelfTest/EnumToString.cpp
@@ -0,0 +1,71 @@
+#include "catch.hpp"
+
+/*
+  TODO: maybe ought to check that user-provided specialisations of
+ Catch::toString also do the right thing
+*/
+
+// Enum without user-provided stream operator
+enum Enum1 { Enum1Value0, Enum1Value1 };
+
+TEST_CASE( "toString(enum)", "[toString][enum]" )
+{
+    Enum1 e0 = Enum1Value0;
+    CHECK( Catch::toString(e0) == "0" );
+    Enum1 e1 = Enum1Value1;
+    CHECK( Catch::toString(e1) == "1" );
+}
+
+// Enum with user-provided stream operator
+enum Enum2 { Enum2Value0, Enum2Value1 };
+
+std::ostream& operator<<( std::ostream& os, Enum2 v )
+{
+    return os << "E2{" << static_cast<int>(v) << "}";
+}
+
+TEST_CASE( "toString(enum w/operator<<)", "[toString][enum]" )
+{
+    Enum2 e0 = Enum2Value0;
+    CHECK( Catch::toString(e0) == "E2{0}" );
+    Enum2 e1 = Enum2Value1;
+    CHECK( Catch::toString(e1) == "E2{1}" );
+}
+
+#if defined(CATCH_CPP11_OR_GREATER)
+// Enum class without user-provided stream operator
+enum class EnumClass1 { EnumClass1Value0, EnumClass1Value1 };
+
+TEST_CASE( "toString(enum class)", "[toString][enum][enumClass]" )
+{
+    EnumClass1 e0 = EnumClass1::EnumClass1Value0;
+    CHECK( Catch::toString(e0) == "0" );
+    EnumClass1 e1 = EnumClass1::EnumClass1Value1;
+    CHECK( Catch::toString(e1) == "1" );
+}
+
+// Enum class with user-provided stream operator
+enum class EnumClass2 : short { EnumClass2Value0, EnumClass2Value1 };
+
+std::ostream& operator<<( std::ostream& os, EnumClass2 e2 )
+{
+    switch( e2 )
+    {
+      case EnumClass2::EnumClass2Value0:
+          return os << "E2/V0";
+      case EnumClass2::EnumClass2Value1:
+          return os << "E2/V1";
+    }
+    return os << "unexpected...";
+}
+
+TEST_CASE( "toString(enum class w/operator<<)", "[toString][enum][enumClass]" )
+{
+    EnumClass2 e0 = EnumClass2::EnumClass2Value0;
+    CHECK( Catch::toString(e0) == "E2/V0" );
+    EnumClass2 e1 = EnumClass2::EnumClass2Value1;
+    CHECK( Catch::toString(e1) == "E2/V1" );
+}
+
+#endif
+