2a0ca9dbaf
wxMax, wxMin and wxClip work correctly when called with a mix of signed and unsigned arguments but give warnings about comparing them when compiled with g++. Cast both arguments to the result type, which is defined consistently with standard C rules for implicit promotion, before comparing them to avoid this. Also add more tests to check that using these functions in this case doesn't provoke warnings. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65933 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
106 lines
3.2 KiB
C++
106 lines
3.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: tests/misc/metatest.cpp
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// Purpose: Test template meta-programming constructs
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// Author: Jaakko Salli
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// RCS-ID: $Id$
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// Copyright: (c) the wxWidgets team
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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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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#include "wx/object.h"
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#include "wx/utils.h"
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#include "wx/meta/pod.h"
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#include "wx/meta/movable.h"
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#ifndef wxNO_RTTI
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#include <typeinfo>
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#endif
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// ----------------------------------------------------------------------------
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// test class
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// ----------------------------------------------------------------------------
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class MetaProgrammingTestCase : public CppUnit::TestCase
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{
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public:
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MetaProgrammingTestCase() { }
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private:
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CPPUNIT_TEST_SUITE( MetaProgrammingTestCase );
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CPPUNIT_TEST( IsPod );
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CPPUNIT_TEST( IsMovable );
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CPPUNIT_TEST( ImplicitConversion );
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CPPUNIT_TEST( MinMax );
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CPPUNIT_TEST_SUITE_END();
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void IsPod();
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void IsMovable();
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void ImplicitConversion();
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void MinMax();
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DECLARE_NO_COPY_CLASS(MetaProgrammingTestCase)
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};
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// register in the unnamed registry so that these tests are run by default
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CPPUNIT_TEST_SUITE_REGISTRATION( MetaProgrammingTestCase );
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// also include in it's own registry so that these tests can be run alone
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CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( MetaProgrammingTestCase,
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"MetaProgrammingTestCase" );
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void MetaProgrammingTestCase::IsPod()
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{
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CPPUNIT_ASSERT(wxIsPod<bool>::value);
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CPPUNIT_ASSERT(wxIsPod<signed int>::value);
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CPPUNIT_ASSERT(wxIsPod<double>::value);
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#if !defined(__VISUALC__) || wxCHECK_VISUALC_VERSION(7)
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CPPUNIT_ASSERT(wxIsPod<wxObject*>::value);
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#endif
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CPPUNIT_ASSERT(!wxIsPod<wxObject>::value);
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}
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void MetaProgrammingTestCase::IsMovable()
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{
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CPPUNIT_ASSERT(wxIsMovable<bool>::value);
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CPPUNIT_ASSERT(wxIsMovable<signed int>::value);
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CPPUNIT_ASSERT(wxIsMovable<double>::value);
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#if !defined(__VISUALC__) || wxCHECK_VISUALC_VERSION(7)
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CPPUNIT_ASSERT(wxIsMovable<wxObject*>::value);
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#endif
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CPPUNIT_ASSERT(!wxIsMovable<wxObject>::value);
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}
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void MetaProgrammingTestCase::ImplicitConversion()
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{
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#ifndef wxNO_RTTI
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CPPUNIT_ASSERT(typeid(wxImplicitConversionType<char,int>::value) == typeid(int));
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CPPUNIT_ASSERT(typeid(wxImplicitConversionType<int,unsigned>::value) == typeid(unsigned));
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#ifdef wxLongLong_t
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CPPUNIT_ASSERT(typeid(wxImplicitConversionType<wxLongLong_t,float>::value) == typeid(float));
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#endif
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#endif // !wxNO_RTTI
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}
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void MetaProgrammingTestCase::MinMax()
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{
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// test that wxMax(1.1,1) returns float, not long int
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float f = wxMax(1.1f, 1l);
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CPPUNIT_ASSERT_EQUAL( 1.1f, f);
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// test that comparing signed and unsigned correctly returns unsigned: this
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// may seem counterintuitive in this case but this is consistent with the
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// standard C conversions
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CPPUNIT_ASSERT_EQUAL( 1, wxMin(-1, 1u) );
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CPPUNIT_ASSERT_EQUAL( -1., wxClip(-1.5, -1, 1) );
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CPPUNIT_ASSERT_EQUAL( 0, wxClip(0, -1, 1) );
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CPPUNIT_ASSERT_EQUAL( 1, wxClip(2l, -1, 1) );
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}
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