Protect std::ios tests under libcpp-no-exceptions

Skip tests that expect an exception be thrown. Also add
some missing asserts in the original test.

Differential Revision: https://reviews.llvm.org/D26512



git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@286823 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/input.output/iostreams.base/ios/basic.ios.members/copyfmt.pass.cpp

@@ -7,7 +7,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-// XFAIL: libcpp-no-exceptions
 // REQUIRES: locale.en_US.UTF-8
 // REQUIRES: locale.fr_FR.UTF-8
 
@@ -23,6 +22,8 @@
 
 #include "platform_support.h" // locale name macros
 
+#include "test_macros.h"
+
 struct testbuf
     : public std::streambuf
 {
@@ -158,6 +159,7 @@ int main()
     ios1.copyfmt(ios1);
     assert(!f1_called);
 
+#ifndef TEST_HAS_NO_EXCEPTIONS
     try
     {
         ios1.copyfmt(ios2);
@@ -166,6 +168,9 @@ int main()
     catch (std::ios_base::failure&)
     {
     }
+#else
+    ios1.copyfmt(ios2);
+#endif
     assert(ios1.rdstate() == std::ios::eofbit);
     assert(ios1.rdbuf() == &sb1);
     assert(ios1.flags() == (std::ios::showpoint | std::ios::uppercase));