e3589af56a
Initialize m_pos correctly when using an existing, and hence possibly not empty, string (and not the internal one which is always empty initially). The old code was totally wrong as it divided the string length by the size of wxChar instead of multiplying by it, but doing this could have been wrong too with UTF-16 and surrogates, so use the conversion object to compute the real length of the string representation in the corresponding encoding. Add a simple unit test checking that this works as intended. Closes #17985.
151 lines
4.0 KiB
C++
151 lines
4.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: tests/streams/sstream.cpp
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// Purpose: Test wxStringInputStream/wxStringOutputStream
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// Author: Vadim Zeitlin
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// Copyright: (c) 2004 Vadim Zeitlin
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx/wx.h".
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// and "wx/cppunit.h"
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#include "testprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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// for all others, include the necessary headers
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#ifndef WX_PRECOMP
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#endif
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#include "wx/sstream.h"
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#include "bstream.h"
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///////////////////////////////////////////////////////////////////////////////
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// The test case
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//
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// Try to fully test wxStringInputStream and wxStringOutputStream
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class strStream :
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public BaseStreamTestCase<wxStringInputStream, wxStringOutputStream>
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{
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public:
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strStream();
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virtual ~strStream();
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CPPUNIT_TEST_SUITE(strStream);
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// Base class stream tests the strStream supports.
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CPPUNIT_TEST(Input_GetSize);
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CPPUNIT_TEST(Input_GetC);
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CPPUNIT_TEST(Input_Read);
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CPPUNIT_TEST(Input_Eof);
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CPPUNIT_TEST(Input_LastRead);
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CPPUNIT_TEST(Input_CanRead);
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CPPUNIT_TEST(Input_SeekI);
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CPPUNIT_TEST(Input_TellI);
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CPPUNIT_TEST(Input_Peek);
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CPPUNIT_TEST(Input_Ungetch);
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CPPUNIT_TEST(Output_PutC);
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CPPUNIT_TEST(Output_Write);
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CPPUNIT_TEST(Output_LastWrite);
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// seeking currently not supported by output string stream
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//CPPUNIT_TEST(Output_SeekO);
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//CPPUNIT_TEST(Output_TellO);
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// Other test specific for String stream test case.
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CPPUNIT_TEST(Output_Check);
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CPPUNIT_TEST_SUITE_END();
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protected:
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void Output_Check();
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private:
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// Implement base class functions.
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virtual wxStringInputStream *DoCreateInStream();
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virtual wxStringOutputStream *DoCreateOutStream();
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// output the given string to wxStringOutputStream and check that its
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// contents is exactly the same string
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void CheckString(const wxString& text);
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wxString m_str;
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};
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strStream::strStream()
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{
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static const size_t LEN = 256;
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m_str.reserve(LEN);
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for ( size_t n = 0; n < LEN; n++ )
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{
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m_str += wxChar(wxT('A') + n % (wxT('Z') - wxT('A') + 1));
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}
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}
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strStream::~strStream()
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{
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}
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wxStringInputStream *strStream::DoCreateInStream()
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{
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wxStringInputStream *pStrInStream = new wxStringInputStream(m_str);
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CPPUNIT_ASSERT(pStrInStream->IsOk());
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return pStrInStream;
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}
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wxStringOutputStream *strStream::DoCreateOutStream()
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{
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wxStringOutputStream *pStrOutStream = new wxStringOutputStream();
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CPPUNIT_ASSERT(pStrOutStream->IsOk());
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return pStrOutStream;
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}
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void strStream::CheckString(const wxString& text)
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{
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wxStringOutputStream sos;
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const wxCharBuffer buf(text.To8BitData());
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sos.Write(buf, buf.length());
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CPPUNIT_ASSERT_EQUAL( text, sos.GetString() );
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}
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void strStream::Output_Check()
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{
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CheckString("Hello world!");
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CheckString(wxString("hi\0dden", 8));
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}
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// Register the stream sub suite, by using some stream helper macro.
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STREAM_TEST_SUBSUITE_NAMED_REGISTRATION(strStream)
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TEST_CASE("wxStringOutputStream::Tell", "[stream]")
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{
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wxStringOutputStream ss;
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CHECK( ss.TellO() == 0 );
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const char* const s = "Hello world";
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const wxFileOffset len = strlen(s);
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ss.Write(s, len);
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CHECK( ss.TellO() == len );
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wxString str(s);
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CHECK( wxStringOutputStream(&str).TellO() == len );
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wxMBConvUTF16 convUTF16;
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wxStringOutputStream ss16(NULL, convUTF16);
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CHECK( ss16.TellO() == 0 );
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const wxCharBuffer s16 = convUTF16.cWC2MB(wxWCharBuffer(str.wc_str()));
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ss16.Write(s16, s16.length());
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CHECK( ss16.TellO() == 2*len );
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CHECK( wxStringOutputStream(&str, convUTF16).TellO() == 2*len );
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// The U+2070D character is represented by a surrogate pair in UTF-16.
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wxString u2070D = wxString::FromUTF8("\xF0\xA0\x9C\x8D");
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CHECK( wxStringOutputStream(&u2070D, convUTF16).TellO() == 4 );
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}
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