jme3-core: add tests for Transform.toString()

jme3-core/src/test/java/com/jme3/math/TestTransform.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2022 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.math;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test the Transform class using JUnit.
+ *
+ * @author Stephen Gold
+ */
+public class TestTransform {
+    /**
+     * Test the {@code toString()} method.
+     */
+    @Test
+    public void testTransformToString() {
+        // Test data that's never modified:
+        final Vector3f t = new Vector3f(12f, -1f, 5f);
+        final Quaternion r = new Quaternion(0f, 0.6f, -0.8f, 0f);
+        final Vector3f s = new Vector3f(1.7f, 1f, 1.7f);
+        final Transform test = new Transform(t, r, s);
+
+        // Verify that the method doesn't throw an exception.
+        String result = test.toString();
+        /*
+         * Verify that the result matches the javadoc
+         * and can be parsed using a regular expression.
+         */
+        Pattern pattern = Pattern.compile(
+                "^Transform\\[ (\\S+), (\\S+), (\\S+)\\]\\n"
+                + "\\[ (\\S+), (\\S+), (\\S+), (\\S+)\\]\\n"
+                + "\\[ (\\S+) , (\\S+), (\\S+)\\]$"
+        );
+        Matcher matcher = pattern.matcher(result);
+        boolean valid = matcher.matches();
+        Assert.assertTrue(valid);
+
+        String txText = matcher.group(1);
+        float tx = Float.parseFloat(txText);
+        Assert.assertEquals(12f, tx, 1e-5f);
+
+        String rzText = matcher.group(6);
+        float rz = Float.parseFloat(rzText);
+        Assert.assertEquals(-0.8f, rz, 1e-6f);
+
+        String szText = matcher.group(10);
+        float sz = Float.parseFloat(szText);
+        Assert.assertEquals(1.7f, sz, 2e-6f);
+    }
+}