Add sv_modifiers_test

test/Jamfile.v2

@@ -250,6 +250,7 @@ run type_name_test.cpp ;
 run sv_types_test.cpp ;
 run sv_construct_test.cpp ;
 run sv_element_access_test.cpp ;
+run sv_modifiers_test.cpp ;
 
 use-project /boost/core/swap : ./swap ;
 build-project ./swap ;

test/sv_modifiers_test.cpp

@@ -0,0 +1,127 @@
+// 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 <cstddef>
+
+int main()
+{
+    {
+        char const* s1 = "12345";
+        char const* s2 = "";
+
+        boost::core::string_view sv1( s1 );
+        boost::core::string_view sv2( s2 );
+
+        sv1.swap( sv2 );
+
+        BOOST_TEST_EQ( sv1.data(), s2 );
+        BOOST_TEST_EQ( sv1.size(), 0 );
+
+        BOOST_TEST_EQ( sv2.data(), s1 );
+        BOOST_TEST_EQ( sv2.size(), 5);
+    }
+
+    {
+        boost::core::string_view sv;
+
+        char const* data = sv.data();
+        std::size_t size = sv.size();
+
+        sv.remove_prefix( 0 );
+
+        BOOST_TEST_EQ( sv.data(), data );
+        BOOST_TEST_EQ( sv.size(), size );
+
+        sv.remove_suffix( 0 );
+
+        BOOST_TEST_EQ( sv.data(), data );
+        BOOST_TEST_EQ( sv.size(), size );
+    }
+
+    {
+        boost::core::string_view sv( "" );
+
+        char const* data = sv.data();
+        std::size_t size = sv.size();
+
+        sv.remove_prefix( 0 );
+
+        BOOST_TEST_EQ( sv.data(), data );
+        BOOST_TEST_EQ( sv.size(), size );
+
+        sv.remove_suffix( 0 );
+
+        BOOST_TEST_EQ( sv.data(), data );
+        BOOST_TEST_EQ( sv.size(), size );
+    }
+
+    {
+        boost::core::string_view sv( "12345" );
+
+        char const* data = sv.data();
+        std::size_t size = sv.size();
+
+        sv.remove_prefix( 0 );
+
+        BOOST_TEST_EQ( sv.data(), data );
+        BOOST_TEST_EQ( sv.size(), size );
+
+        sv.remove_suffix( 0 );
+
+        BOOST_TEST_EQ( sv.data(), data );
+        BOOST_TEST_EQ( sv.size(), size );
+    }
+
+    {
+        boost::core::string_view sv( "12345" );
+
+        char const* data = sv.data();
+        std::size_t size = sv.size();
+
+        sv.remove_prefix( 2 );
+
+        BOOST_TEST_EQ( sv.data(), data + 2 );
+        BOOST_TEST_EQ( sv.size(), size - 2 );
+    }
+
+    {
+        boost::core::string_view sv( "12345" );
+
+        char const* data = sv.data();
+        std::size_t size = sv.size();
+
+        sv.remove_prefix( 5 );
+
+        BOOST_TEST_EQ( sv.data(), data + 5 );
+        BOOST_TEST_EQ( sv.size(), size - 5 );
+    }
+
+    {
+        boost::core::string_view sv( "12345" );
+
+        char const* data = sv.data();
+        std::size_t size = sv.size();
+
+        sv.remove_suffix( 2 );
+
+        BOOST_TEST_EQ( sv.data(), data );
+        BOOST_TEST_EQ( sv.size(), size - 2 );
+    }
+
+    {
+        boost::core::string_view sv( "12345" );
+
+        char const* data = sv.data();
+        std::size_t size = sv.size();
+
+        sv.remove_suffix( 5 );
+
+        BOOST_TEST_EQ( sv.data(), data );
+        BOOST_TEST_EQ( sv.size(), size - 5 );
+    }
+
+    return boost::report_errors();
+}