Add sv_copy_test

test/Jamfile.v2

@@ -251,6 +251,7 @@ run sv_types_test.cpp ;
 run sv_construct_test.cpp ;
 run sv_element_access_test.cpp ;
 run sv_modifiers_test.cpp ;
+run sv_copy_test.cpp ;
 
 use-project /boost/core/swap : ./swap ;
 build-project ./swap ;

test/sv_copy_test.cpp

@@ -0,0 +1,50 @@
+// Copyright 2021 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/core/string_view.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <stdexcept>
+#include <cstddef>
+
+int main()
+{
+    {
+        boost::core::string_view sv;
+
+        BOOST_TEST_EQ( sv.copy( 0, 0 ), 0 );
+        BOOST_TEST_EQ( sv.copy( 0, 0, 0 ), 0 );
+        BOOST_TEST_THROWS( sv.copy( 0, 0, 1 ), std::out_of_range );
+        BOOST_TEST_THROWS( sv.copy( 0, 0, boost::core::string_view::npos ), std::out_of_range );
+    }
+
+    {
+        boost::core::string_view sv( "12345" );
+        char buffer[ 8 ] = {};
+
+        BOOST_TEST_EQ( sv.copy( buffer, 0 ), 0 );
+        BOOST_TEST_EQ( buffer[0], 0 );
+
+        BOOST_TEST_EQ( sv.copy( buffer, 0, 0 ), 0 );
+        BOOST_TEST_EQ( buffer[0], 0 );
+
+        BOOST_TEST_EQ( sv.copy( buffer, 0, 1 ), 0 );
+        BOOST_TEST_EQ( buffer[0], 0 );
+
+        BOOST_TEST_THROWS( sv.copy( buffer, 0, boost::core::string_view::npos ), std::out_of_range );
+        BOOST_TEST_EQ( buffer[0], 0 );
+
+        BOOST_TEST_EQ( sv.copy( buffer, 1 ), 1 );
+        BOOST_TEST_EQ( buffer[0], '1' );
+        BOOST_TEST_EQ( buffer[1], 0 );
+
+        BOOST_TEST_EQ( sv.copy( buffer, 1, 1 ), 1 );
+        BOOST_TEST_EQ( buffer[0], '2' );
+        BOOST_TEST_EQ( buffer[1], 0 );
+
+        BOOST_TEST_EQ( sv.copy( buffer, 8 ), 5 );
+        BOOST_TEST_CSTR_EQ( buffer, "12345" );
+    }
+
+    return boost::report_errors();
+}