File indexing completed on 2024-07-21 10:09:32

 // SPDX-FileCopyrightText: Lukas Sommer <sommerluk@gmail.com>
 // SPDX-License-Identifier: BSD-2-Clause OR MIT
 
 // First included header is the public header of the class we are testing;
 // this forces the header to be self-contained.
 #include "colorwheelimage.h"
 
 #include "rgbcolorspacefactory.h"
 #include <qcolor.h>
 #include <qglobal.h>
 #include <qimage.h>
 #include <qobject.h>
 #include <qsharedpointer.h>
 #include <qsize.h>
 #include <qtest.h>
 #include <qtestcase.h>
 #include <qwidget.h>
 
 #if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 #include <qtmetamacros.h>
 #else
 #include <qobjectdefs.h>
 #include <qstring.h>
 #endif
 
 class TestColorWheelSnippetClass : public QWidget
 {
     Q_OBJECT
 public:
     // A constructor that is clazy-conform
     explicit TestColorWheelSnippetClass(QWidget *parent = nullptr)
         : QWidget(parent)
     {
     }
     void testSnippet01()
     {
         //! [ColorWheelImage HiDPI usage]
         auto myColorSpace = PerceptualColor::RgbColorSpaceFactory::createSrgb();
         PerceptualColor::ColorWheelImage test{myColorSpace};
         // The function setImageSize() expects an int
         // value. static_cast<int> will round down, which
         // is the desired behaviour here. (Rounding up
         // would mean one more pixel, and on some Qt
         // styles this would fail.)
         test.setImageSize(static_cast<int>(100 * devicePixelRatioF()));
         test.setBorder(5 * devicePixelRatioF());
         test.setWheelThickness(10 * devicePixelRatioF());
         test.setDevicePixelRatioF(devicePixelRatioF());
         QImage myImage = test.getImage();
         //! [ColorWheelImage HiDPI usage]
         Q_UNUSED(myImage)
     }
 };
 
 namespace PerceptualColor
 {
 class RgbColorSpace;
 
 class TestColorWheelImage : public QObject
 {
     Q_OBJECT
 
 public:
     explicit TestColorWheelImage(QObject *parent = nullptr)
         : QObject(parent)
     {
     }
 
 private:
     QSharedPointer<RgbColorSpace> colorSpace = RgbColorSpaceFactory::createSrgb();
 
 private Q_SLOTS:
     void initTestCase()
     {
         // Called before the first test function is executed
     }
 
     void cleanupTestCase()
     {
         // Called after the last test function was executed
     }
 
     void init()
     {
         // Called before each test function is executed
     }
 
     void cleanup()
     {
         // Called after every test function
     }
 
     void testConstructor()
     {
         ColorWheelImage test(colorSpace);
     }
 
     void testImageSize()
     {
         ColorWheelImage test(colorSpace);
         QCOMPARE(test.getImage().size(), QSize(0, 0));
         test.setImageSize(5);
         QCOMPARE(test.getImage().size(), QSize(5, 5));
         test.setImageSize(500);
         QCOMPARE(test.getImage().size(), QSize(500, 500));
     }
 
     void testDevicePixelRatioF()
     {
         ColorWheelImage test(colorSpace);
         test.setImageSize(100);
         // Image size is as described.
         QCOMPARE(test.getImage().size(), QSize(100, 100));
         // Default devicePixelRatioF is 1
         QCOMPARE(test.getImage().devicePixelRatio(), 1);
         // Testing with a (non-integer) scale factor
         test.setDevicePixelRatioF(1.5);
         // Image size remains unchanged.
         QCOMPARE(test.getImage().size(), QSize(100, 100));
         // Default devicePixelRatioF is 1.5
         QCOMPARE(test.getImage().devicePixelRatio(), 1.5);
     }
 
     void testBorderOdd()
     {
         ColorWheelImage test(colorSpace);
         test.setImageSize(99);
         // Default border is zero: no transparent border.
         QVERIFY2(test.getImage().pixelColor(49, 0).alpha() > 0, "Verify that pixel top center is not transparent.");
         QVERIFY2(test.getImage().pixelColor(49, 98).alpha() > 0, "Verify that pixel bottom center is not transparent.");
         QVERIFY2(test.getImage().pixelColor(0, 49).alpha() > 0, "Verify that pixel left is not transparent.");
         QVERIFY2(test.getImage().pixelColor(98, 49).alpha() > 0, "Verify that pixel right is not transparent.");
         test.setBorder(1);
         // Now, the pixels should become transparent.
         QCOMPARE(test.getImage().pixelColor(49, 0).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(49, 98).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(0, 49).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(98, 49).alpha(), 0);
     }
 
     void testBorderEven()
     {
         ColorWheelImage test(colorSpace);
         test.setImageSize(100);
         // Default border is zero: no transparent border.
         QVERIFY2(test.getImage().pixelColor(49, 0).alpha() > 0, "Verify that pixel top center is not transparent.");
         QVERIFY2(test.getImage().pixelColor(50, 0).alpha() > 0, "Verify that pixel top center is not transparent.");
         QVERIFY2(test.getImage().pixelColor(49, 99).alpha() > 0, "Verify that pixel bottom center is not transparent.");
         QVERIFY2(test.getImage().pixelColor(50, 99).alpha() > 0, "Verify that pixel bottom center is not transparent.");
         QVERIFY2(test.getImage().pixelColor(0, 49).alpha() > 0, "Verify that pixel left is not transparent.");
         QVERIFY2(test.getImage().pixelColor(0, 50).alpha() > 0, "Verify that pixel left is not transparent.");
         QVERIFY2(test.getImage().pixelColor(99, 49).alpha() > 0, "Verify that pixel right is not transparent.");
         QVERIFY2(test.getImage().pixelColor(99, 50).alpha() > 0, "Verify that pixel right is not transparent.");
         test.setBorder(1);
         // Now, the pixels should become transparent.
         QCOMPARE(test.getImage().pixelColor(49, 0).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(50, 0).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(49, 99).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(50, 99).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(0, 49).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(0, 50).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(99, 49).alpha(), 0);
         QCOMPARE(test.getImage().pixelColor(99, 50).alpha(), 0);
     }
 
     void testCache()
     {
         ColorWheelImage test(colorSpace);
         test.setImageSize(50); // Set a non-zero image size
         QVERIFY2(test.m_image.isNull(), "Verify that instantiation is done with empty cache.");
         test.setBorder(5);
         QVERIFY2(test.m_image.isNull(), "Verify that setting border does not trigger re-calculation.");
         Q_UNUSED(test.getImage());
         QVERIFY2(!test.m_image.isNull(), "Verify that getImage() triggers re-calculation.");
         test.setBorder(5);
         QVERIFY2(!test.m_image.isNull(),
                  "Verify that setBorder() does not erase the cache"
                  " if the value that was set is the same than before.");
     }
 
     void testCornerCases()
     {
         ColorWheelImage test(colorSpace);
         test.setImageSize(50); // Set a non-zero image size
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setBorder(10);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setBorder(25);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setBorder(100);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setBorder(5);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setWheelThickness(0);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setWheelThickness(10);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setWheelThickness(25);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setWheelThickness(100);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
         test.setWheelThickness(10);
         QVERIFY2(!test.getImage().isNull(),
                  "Verify that there is no crash and the returned image is not "
                  "null.");
     }
 
     void testVeryThickWheel()
     {
         ColorWheelImage test(colorSpace);
         test.setImageSize(51); // Set a non-zero image size
         test.setWheelThickness(100);
         // The wheel is so thick that even in the middle, there should be
         // a fully opaque pixel.
         QCOMPARE(test.getImage().pixelColor(25, 25).alpha(), 255);
     }
 
     void testVeryBigBorder()
     {
         ColorWheelImage test(colorSpace);
         const int myImageSize = 51;
         test.setImageSize(myImageSize); // Set a non-zero image size
         test.setWheelThickness(5);
         // Set a border that is bigger than half of the image size
         test.setBorder(myImageSize / 2 + 1);
         // The border is so big that the hole image should be transparent.
         for (int x = 0; x < myImageSize; ++x) {
             for (int y = 0; y < myImageSize; ++y) {
                 QCOMPARE(test.getImage().pixelColor(x, y).alpha(), 0);
             }
         }
     }
 
     void testDevicePixelRatioFForExtremeCases()
     {
         ColorWheelImage test(colorSpace);
         // Testing with a (non-integer) scale factor
         test.setDevicePixelRatioF(1.5);
         // Test with fully transparent image (here, the border is too big
         // for the given image size)
         test.setImageSize(20);
         test.setBorder(30);
         QCOMPARE(test.getImage().devicePixelRatio(), 1.5);
     }
 
     void testSnippet01()
     {
         TestColorWheelSnippetClass mySnippets;
         mySnippets.testSnippet01();
     }
 };
 
 } // namespace PerceptualColor
 
 QTEST_MAIN(PerceptualColor::TestColorWheelImage)
 
 // The following “include” is necessary because we do not use a header file:
 #include "testcolorwheelimage.moc"