Add some new DeviceRgb tests.

The changes have been implemented in the scope of the fourth technical debt.

Author: ars18wrw

kernel/src/test/java/com/itextpdf/kernel/colors/DeviceRgbTest.java

@@ -0,0 +1,155 @@
+/*
+    This file is part of the iText (R) project.
+    Copyright (c) 1998-2019 iText Group NV
+    Authors: iText Software.
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License version 3
+    as published by the Free Software Foundation with the addition of the
+    following permission added to Section 15 as permitted in Section 7(a):
+    FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
+    ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
+    OF THIRD PARTY RIGHTS
+
+    This program is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE.
+    See the GNU Affero General Public License for more details.
+    You should have received a copy of the GNU Affero General Public License
+    along with this program; if not, see http://www.gnu.org/licenses or write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA, 02110-1301 USA, or download the license from the following URL:
+    http://itextpdf.com/terms-of-use/
+
+    The interactive user interfaces in modified source and object code versions
+    of this program must display Appropriate Legal Notices, as required under
+    Section 5 of the GNU Affero General Public License.
+
+    In accordance with Section 7(b) of the GNU Affero General Public License,
+    a covered work must retain the producer line in every PDF that is created
+    or manipulated using iText.
+
+    You can be released from the requirements of the license by purchasing
+    a commercial license. Buying such a license is mandatory as soon as you
+    develop commercial activities involving the iText software without
+    disclosing the source code of your own applications.
+    These activities include: offering paid services to customers as an ASP,
+    serving PDFs on the fly in a web application, shipping iText with a closed
+    source product.
+
+    For more information, please contact iText Software Corp. at this
+    address: [email protected]
+ */
+package com.itextpdf.kernel.colors;
+
+import com.itextpdf.io.LogMessageConstant;
+import com.itextpdf.test.ExtendedITextTest;
+import com.itextpdf.test.annotations.LogMessage;
+import com.itextpdf.test.annotations.LogMessages;
+import com.itextpdf.test.annotations.type.UnitTest;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+import java.awt.Color;
+
+@Category(UnitTest.class)
+public class DeviceRgbTest extends ExtendedITextTest {
+
+    @Test
+    public void makeDarkerTest() {
+        DeviceRgb rgbColor = new DeviceRgb(50, 100, 150);
+
+        DeviceRgb darkerRgbColor = DeviceRgb.makeDarker(rgbColor);
+        // check the resultant darkness of RGB items with using this multiplier
+        float multiplier = Math.max(0f, (150f / 255 - 0.33f) / (150f / 255));
+
+        Assert.assertEquals(multiplier * (50f / 255), darkerRgbColor.getColorValue()[0], 0.0001);
+        Assert.assertEquals(multiplier * (100f / 255), darkerRgbColor.getColorValue()[1], 0.0001);
+        Assert.assertEquals(multiplier * (150f / 255), darkerRgbColor.getColorValue()[2], 0.0001);
+    }
+
+    @Test
+    public void makeLighterTest() {
+        DeviceRgb rgbColor = new DeviceRgb(50, 100, 150);
+
+        DeviceRgb darkerRgbColor = DeviceRgb.makeLighter(rgbColor);
+        // check the resultant darkness of RGB items with using this multiplier
+        float multiplier = Math.min(1f, 150f / 255 + 0.33f) / (150f / 255);
+
+        Assert.assertEquals(multiplier * (50f / 255), darkerRgbColor.getColorValue()[0], 0.0001);
+        Assert.assertEquals(multiplier * (100f / 255), darkerRgbColor.getColorValue()[1], 0.0001);
+        Assert.assertEquals(multiplier * (150f / 255), darkerRgbColor.getColorValue()[2], 0.0001);
+    }
+
+    @Test
+    public void colorByAWTColorConstantTest() {
+        // RED
+        DeviceRgb rgbColor = new DeviceRgb(Color.RED);
+        float[] rgbColorValue = rgbColor.getColorValue();
+
+        Assert.assertEquals(1, rgbColorValue[0], 0.0001);
+        Assert.assertEquals(0, rgbColorValue[1], 0.0001);
+        Assert.assertEquals(0, rgbColorValue[2], 0.0001);
+
+        // GREEN
+        rgbColor = new DeviceRgb(Color.GREEN);
+        rgbColorValue = rgbColor.getColorValue();
+
+        Assert.assertEquals(0, rgbColorValue[0], 0.0001);
+        Assert.assertEquals(1, rgbColorValue[1], 0.0001);
+        Assert.assertEquals(0, rgbColorValue[2], 0.0001);
+
+        // BLUE
+        rgbColor = new DeviceRgb(Color.BLUE);
+        rgbColorValue = rgbColor.getColorValue();
+
+        Assert.assertEquals(0, rgbColorValue[0], 0.0001);
+        Assert.assertEquals(0, rgbColorValue[1], 0.0001);
+        Assert.assertEquals(1, rgbColorValue[2], 0.0001);
+    }
+
+    @Test
+    public void colorByAWTColorTest() {
+        Color color = new Color(50, 100, 150);
+        DeviceRgb rgbColor = new DeviceRgb(color);
+        float[] rgbColorValue = rgbColor.getColorValue();
+        Assert.assertEquals(50f / 255, rgbColorValue[0], 0.0001);
+        Assert.assertEquals(100f / 255, rgbColorValue[1], 0.0001);
+        Assert.assertEquals(150f / 255, rgbColorValue[2], 0.0001);
+    }
+
+    @Test
+    @LogMessages(messages = {
+            @LogMessage(messageTemplate = LogMessageConstant.COLORANT_INTENSITIES_INVALID, count = 14)
+    })
+    public void invalidConstructorArgumentsTest() {
+        Assert.assertEquals(0, getSumOfColorValues(new DeviceRgb(-2f, 0f, 0f)), 0.001f);
+        Assert.assertEquals(0, getSumOfColorValues(new DeviceRgb(0f, -2f, 0f)), 0.001f);
+        Assert.assertEquals(0, getSumOfColorValues(new DeviceRgb(0f, 0f, -2f)), 0.001f);
+
+        Assert.assertEquals(1, getSumOfColorValues(new DeviceRgb(2f, 0f, 0f)), 0.001f);
+        Assert.assertEquals(1, getSumOfColorValues(new DeviceRgb(0f, 2f, 0f)), 0.001f);
+        Assert.assertEquals(1, getSumOfColorValues(new DeviceRgb(0f, 0f, 2f)), 0.001f);
+
+        Assert.assertEquals(0, getSumOfColorValues(new DeviceRgb(-2f, -2f, 0f)), 0.001f);
+        Assert.assertEquals(0, getSumOfColorValues(new DeviceRgb(-2f, 0f, -2f)), 0.001f);
+        Assert.assertEquals(0, getSumOfColorValues(new DeviceRgb(0f, -2f, -2f)), 0.001f);
+
+        Assert.assertEquals(2, getSumOfColorValues(new DeviceRgb(2f, 2f, 0f)), 0.001f);
+        Assert.assertEquals(2, getSumOfColorValues(new DeviceRgb(2f, 0f, 2f)), 0.001f);
+        Assert.assertEquals(2, getSumOfColorValues(new DeviceRgb(0f, 2f, 2f)), 0.001f);
+
+        Assert.assertEquals(0, getSumOfColorValues(new DeviceRgb(-2f, -2f, -2f)), 0.001f);
+        Assert.assertEquals(3, getSumOfColorValues(new DeviceRgb(2f, 2f, 2f)), 0.001f);
+    }
+
+    private float getSumOfColorValues(DeviceRgb deviceRgb) {
+        float sum = 0;
+        float[] values = deviceRgb.getColorValue();
+        for (int i = 0; i < values.length; i++) {
+            sum += values[i];
+        }
+        return sum;
+    }
+}