sal/qa/rtl/strings/test_oustring_concat.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 // activate support for detecting errors instead of getting compile errors
  11 #define RTL_STRING_UNITTEST_CONCAT
  12 extern bool rtl_string_unittest_invalid_concat;
  13
  14 #include <sal/types.h>
  15 #include <cppunit/TestFixture.h>
  16 #include <cppunit/extensions/HelperMacros.h>
  17
  18 #include <rtl/ustring.hxx>
  19 #include <rtl/ustrbuf.hxx>
  20 #include <rtl/string.hxx>
  21 #include <rtl/strbuf.hxx>
  22
  23 #include <typeinfo>
  24
  25 using namespace rtl;
  26
  27 namespace std
  28 {
  29 template< typename charT, typename traits > std::basic_ostream<charT, traits> &
  30 operator <<(
  31     std::basic_ostream<charT, traits> & stream, const std::type_info& info )
  32 {
  33     return stream << info.name();
  34 }
  35 } // namespace
  36
  37 namespace test { namespace oustring {
  38
  39 class StringConcat : public CppUnit::TestFixture
  40 {
  41 private:
  42     void checkConcat();
  43     void checkConcatAsciiL();
  44     void checkEnsureCapacity();
  45     void checkAppend();
  46     void checkInvalid();
  47
  48 CPPUNIT_TEST_SUITE(StringConcat);
  49 CPPUNIT_TEST(checkConcat);
  50 CPPUNIT_TEST(checkConcatAsciiL);
  51 CPPUNIT_TEST(checkEnsureCapacity);
  52 CPPUNIT_TEST(checkAppend);
  53 CPPUNIT_TEST(checkInvalid);
  54 CPPUNIT_TEST_SUITE_END();
  55 };
  56
  57 void test::oustring::StringConcat::checkConcat()
  58 {
  59 // All the extra () are to protect commas against being treated as separators of macro arguments.
  60     CPPUNIT_ASSERT_EQUAL( OUString(), OUString(OUString() + OUString()));
  61     CPPUNIT_ASSERT_EQUAL( OUString( "foobar" ), OUString( OUString( "foo" ) + OUString( "bar" )));
  62     CPPUNIT_ASSERT_EQUAL(( typeid( OUStringConcat< OUString, OUString > )), typeid( OUString( "foo" ) + OUString( "bar" )));
  63     CPPUNIT_ASSERT_EQUAL( OUString( "foobar" ), OUString( OUString( "foo" ) + "bar" ));
  64     CPPUNIT_ASSERT_EQUAL(( typeid( OUStringConcat< OUString, const char[ 4 ] > )), typeid( OUString( "foo" ) + "bar" ));
  65     CPPUNIT_ASSERT_EQUAL( OUString( "foobarbaz" ), OUString( OUString( "foo" ) + "bar" + "baz" ));
  66     CPPUNIT_ASSERT_EQUAL(( typeid( OUStringConcat< OUStringConcat< OUString, const char[ 4 ] >, const char[ 4 ] > )), typeid( OUString( "foo" ) + "bar" + "baz" ));
  67     CPPUNIT_ASSERT_EQUAL( OUString( "foobar" ), OUString( OUStringLiteral( "foo" ) + "bar" ));
  68     CPPUNIT_ASSERT_EQUAL(( typeid( OUStringConcat< OUStringLiteral, const char[ 4 ] > )), typeid( OUStringLiteral( "foo" ) + "bar" ));
  69     const char d1[] = "xyz";
  70     CPPUNIT_ASSERT_EQUAL( OUString( "fooxyz" ), OUString( OUString( "foo" ) + d1 ));
  71     CPPUNIT_ASSERT_EQUAL(( typeid( OUStringConcat< OUString, const char[ 4 ] > )), typeid( OUString( "foo" ) + d1 ));
  72 }
  73
  74 void test::oustring::StringConcat::checkConcatAsciiL()
  75 {
  76     {
  77         OUString s("foo");
  78         CPPUNIT_ASSERT_EQUAL(OUString("foo"), s += "");
  79     }
  80     {
  81         OUString s("foo");
  82         CPPUNIT_ASSERT_EQUAL(OUString("foobar"), s += "bar");
  83     }
  84 }
  85
  86 void test::oustring::StringConcat::checkEnsureCapacity()
  87 {
  88     rtl_uString* str = nullptr;
  89     rtl_uString_newFromLiteral( &str, "test", strlen( "test" ), 0 );
  90     CPPUNIT_ASSERT_EQUAL( sal_Int32( 4 ), str->length );
  91     CPPUNIT_ASSERT_EQUAL( 1, int( str->refCount ));
  92
  93     rtl_uString* oldStr = str;
  94     rtl_uString_ensureCapacity( &str, 4 ); // should be no-op
  95     CPPUNIT_ASSERT_EQUAL( sal_Int32( 4 ), str->length );
  96     CPPUNIT_ASSERT_EQUAL( 1, int( str->refCount ));
  97     CPPUNIT_ASSERT_EQUAL( str, oldStr );
  98
  99     rtl_uString_acquire( oldStr );
 100     CPPUNIT_ASSERT_EQUAL( 2, int( str->refCount ));
 101     rtl_uString_ensureCapacity( &str, 4 );
 102     CPPUNIT_ASSERT_EQUAL( sal_Int32( 4 ), str->length );
 103     CPPUNIT_ASSERT_EQUAL( 1, int( str->refCount ));
 104     // a copy was forced because of refcount
 105     CPPUNIT_ASSERT( oldStr != str );
 106     CPPUNIT_ASSERT_EQUAL( static_cast<sal_Int32>(0), rtl_ustr_compare( oldStr->buffer, str->buffer ) );
 107     CPPUNIT_ASSERT_EQUAL( 1, int( oldStr->refCount ));
 108     rtl_uString_release( str );
 109     str = oldStr;
 110
 111     rtl_uString_acquire( oldStr );
 112     rtl_uString_ensureCapacity( &str, 1024 );
 113     CPPUNIT_ASSERT_EQUAL( sal_Int32( 4 ), str->length ); // size is still 4
 114     CPPUNIT_ASSERT_EQUAL( 1, int( str->refCount ));
 115     CPPUNIT_ASSERT( oldStr != str );
 116     CPPUNIT_ASSERT_EQUAL( static_cast<sal_Int32>(0), rtl_ustr_compare( oldStr->buffer, str->buffer ) );
 117     CPPUNIT_ASSERT_EQUAL( 1, int( oldStr->refCount ));
 118     // but there should be extra capacity
 119     for( int i = 0;
 120          i < 20;
 121          ++i )
 122         str->buffer[ str->length + i ] = '0';
 123     str->length += 20;
 124     rtl_uString_release( str );
 125     rtl_uString_release( oldStr );
 126 }
 127
 128 void test::oustring::StringConcat::checkAppend()
 129 {
 130     OUString str( "foo" );
 131     str += OUStringLiteral( "bar" ) + "baz";
 132     CPPUNIT_ASSERT_EQUAL( OUString( "foobarbaz" ), str );
 133     OUStringBuffer buf( "foo" );
 134     buf.append( OUStringLiteral( "bar" ) + "baz" );
 135     CPPUNIT_ASSERT_EQUAL( OUString( "foobarbaz" ), buf.makeStringAndClear());
 136 }
 137
 138 #define INVALID_CONCAT( expression ) \
 139     ( \
 140     rtl_string_unittest_invalid_concat = false, \
 141     ( void ) OUString( expression ), \
 142     rtl_string_unittest_invalid_concat )
 143
 144 void test::oustring::StringConcat::checkInvalid()
 145 {
 146     CPPUNIT_ASSERT( !INVALID_CONCAT( OUString() + OUString()));
 147     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "a" ) + OUStringBuffer( "b" )));
 148     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "a" ) + OString( "b" )));
 149     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "a" ) + OStringBuffer( "b" )));
 150     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "a" ) + static_cast<const char*>("b") ));
 151     char d[] = "b";
 152     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "a" ) + d ));
 153     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "a" ) + static_cast<char*>(d) ));
 154     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "a" ) + OStringLiteral( "b" )));
 155     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "a" ) + 1 ));
 156     rtl_String* rs = nullptr;
 157     rtl_uString* rus = nullptr;
 158     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "b" ) + rs ));
 159     CPPUNIT_ASSERT( INVALID_CONCAT( OUString( "b" ) + rus ));
 160
 161 #if 0
 162     // Should fail to compile, to avoid use of OUStringConcat lvalues that
 163     // contain dangling references to temporaries:
 164     auto const conc = OUStringLiteral("foo") + "bar";
 165     (void) OUString(conc);
 166 #endif
 167 }
 168
 169 }} // namespace
 170
 171 CPPUNIT_TEST_SUITE_REGISTRATION(test::oustring::StringConcat);
 172
 173 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */