1ea95c73f8
Check that Intersect() returns true, yet the intersection is empty. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72724 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
141 lines
3.6 KiB
C++
141 lines
3.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: tests/geometry/region.cpp
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// Purpose: wxRegion unit test
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// Author: Vadim Zeitlin
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// Created: 2011-10-12
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// RCS-ID: $Id$
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// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
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///////////////////////////////////////////////////////////////////////////////
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// ----------------------------------------------------------------------------
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// headers
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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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#ifndef WX_PRECOMP
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#include "wx/region.h"
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#endif // WX_PRECOMP
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#include "wx/iosfwrap.h"
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// ----------------------------------------------------------------------------
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// helper functions
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// ----------------------------------------------------------------------------
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namespace
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{
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// This function could be easily added to wxRegionIterator itself, where it
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// could be implemented far more efficiently as all major platforms store the
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// number of rectangles anyhow, but as we only use it for debugging purposes,
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// just keep it here for now.
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unsigned GetRectsCount(const wxRegion& rgn)
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{
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unsigned count = 0;
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for ( wxRegionIterator iter(rgn); iter.HaveRects(); ++iter )
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count++;
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return count;
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}
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} // anonymous namespace
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// this operator is needed to use CPPUNIT_ASSERT_EQUAL with wxRegions
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std::ostream& operator<<(std::ostream& os, const wxRegion& rgn)
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{
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wxRect r = rgn.GetBox();
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os << "# rects = " << GetRectsCount(rgn)
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<< "; bounding box {"
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<< r.x << ", " << r.y << ", " << r.width << ", " << r.height
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<< "}";
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return os;
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}
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// ----------------------------------------------------------------------------
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// test class
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// ----------------------------------------------------------------------------
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class RegionTestCase : public CppUnit::TestCase
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{
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public:
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RegionTestCase() { }
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private:
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CPPUNIT_TEST_SUITE( RegionTestCase );
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CPPUNIT_TEST( Validity );
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CPPUNIT_TEST( Intersect );
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CPPUNIT_TEST_SUITE_END();
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void Validity();
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void Intersect();
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wxDECLARE_NO_COPY_CLASS(RegionTestCase);
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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( RegionTestCase );
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// also include in its own registry so that these tests can be run alone
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CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( RegionTestCase, "RegionTestCase" );
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void RegionTestCase::Validity()
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{
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wxRegion r;
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CPPUNIT_ASSERT_MESSAGE
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(
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"Default constructed region must be invalid",
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!r.IsOk()
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);
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CPPUNIT_ASSERT_MESSAGE
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(
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"Invalid region should be empty",
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r.IsEmpty()
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);
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// Offsetting an invalid region doesn't make sense.
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WX_ASSERT_FAILS_WITH_ASSERT( r.Offset(1, 1) );
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CPPUNIT_ASSERT_MESSAGE
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(
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"Combining with a valid region should create a valid region",
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r.Union(0, 0, 10, 10)
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);
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CPPUNIT_ASSERT_EQUAL_MESSAGE
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(
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"Union() with invalid region should give the same region",
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wxRegion(0, 0, 10, 10),
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r
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);
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}
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void RegionTestCase::Intersect()
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{
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const wxPoint points1[] = {
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wxPoint(310, 392),
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wxPoint(270, 392),
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wxPoint(270, 421),
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wxPoint(310, 421)
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};
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wxRegion region1(WXSIZEOF(points1), points1);
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const wxPoint points2[] = {
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wxPoint(54, 104),
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wxPoint(85, 82),
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wxPoint(68, 58),
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wxPoint(37, 80)
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};
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wxRegion region2(4,points2);
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CPPUNIT_ASSERT( region1.Intersect(region2) );
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CPPUNIT_ASSERT( region1.IsEmpty() );
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}
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