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///////////////////////////////////////////////////////////////////////////////
// Name: tests/misc/textwrap.cpp
// Purpose: wxTextWrapper unit test
// Author: Vadim Zeitlin
// Created: 2025-01-19
// Copyright: (c) 2025 Vadim Zeitlin
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include "testprec.h"
#ifndef WX_PRECOMP
#include "wx/app.h"
#endif // !PCH
#include "wx/textwrapper.h"
// ----------------------------------------------------------------------------
// wrapper implementation for testing
// ----------------------------------------------------------------------------
namespace
{
class HardBreakWrapper : public wxTextWrapper
{
public:
HardBreakWrapper() { }
// Return the window used for wrapping: for now, use the main frame because
// it doesn't really matter which one we use.
wxWindow* GetWindow() const
{
return wxTheApp->GetTopWindow();
}
// Helper function returning the width of the given text.
int GetExtent(const wxString& text) const
{
return GetWindow()->GetTextExtent(text).x;
}
// Wrap and return the number of lines in the wrapped text.
size_t Do(const wxString& text, int width)
{
Wrap(GetWindow(), text, width);
return m_lines.size();
}
const wxString& GetLine(size_t n) const
{
REQUIRE( n < m_lines.size() );
return m_lines[n];
}
wxString GetResult() const { return wxJoin(m_lines, '\n'); }
protected:
void OnOutputLine(const wxString& line) wxOVERRIDE { m_lines.push_back(line); }
private:
wxArrayString m_lines;
};
} // anonymous namespace
// ----------------------------------------------------------------------------
// the tests
// ----------------------------------------------------------------------------
TEST_CASE("wxTextWrapper::Wrap", "[text]")
{
// Note that this text shouldn't contain line breaks.
const wxString text =
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, "
"sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
;
HardBreakWrapper w;
// Check that not wrapping the text works.
SECTION("None")
{
REQUIRE( w.Do(text, -1) == 1 );
CHECK( w.GetLine(0) == text );
}
SECTION("Wide")
{
REQUIRE( w.Do(text, 200*w.GetExtent("x")) == 1 );
CHECK( w.GetLine(0) == text );
}
// Check that wrapping the text using reasonable width works.
SECTION("Normal")
{
const size_t n = w.Do(text, 40*w.GetExtent("x"));
INFO("Wrapped text:\n" << w.GetResult() << "\n");
CHECK( n >= 3 );
}
SECTION("Narrow")
{
const size_t n = w.Do(text, w.GetExtent("Lorum ipsum dolor"));
INFO("Wrapped text:\n" << w.GetResult() << "\n");
CHECK( n >= 8 );
CHECK( w.GetLine(0) == "Lorem ipsum dolor" );
}
// Make the window too narrow to fit the word "consectetur" and check that
// the text is still wrapped reasonableness well.
SECTION("Thin")
{
const size_t n = w.Do(text, w.GetExtent("Lorum"));
INFO("Wrapped text:\n" << w.GetResult() << "\n");
CHECK( n > 10 );
CHECK( w.GetLine(0) == "Lorem" );
// There should be just one line with the word "consectetur", longer
// than the wrap width.
bool found = false;
for ( size_t i = 1; i < n; ++i )
{
if ( w.GetLine(i) == "consectetur" )
{
found = true;
break;
}
}
CHECK( found );
}
// Make the window too narrow to fit even a single character so that
// wrapped text has one word per line.
SECTION("Narrowest")
{
const size_t n = w.Do(text, 1);
INFO("Wrapped text:\n" << w.GetResult() << "\n");
REQUIRE( n == static_cast<size_t>(text.Freq(' ')) + 1 );
CHECK( w.GetLine(0) == "Lorem" );
CHECK( w.GetLine(5) == "consectetur" );
}
}
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