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Projekte/common/src/test/java/pp/util/RandomPositionIteratorTest.java

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+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.util;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class RandomPositionIteratorTest {
+    public static final int WIDTH = 15;
+    public static final int HEIGHT = 25;
+
+    @Test
+    public void permutation() {
+        for (int i = 0; i < 10; i++) {
+            final List<Position> permutation = new ArrayList<>();
+            RandomPositionIterator.floatPoints(WIDTH, HEIGHT).forEachRemaining(permutation::add);
+            assertEquals(WIDTH * HEIGHT, permutation.size());
+            assertEquals(permutation.size(), new HashSet<>(permutation).size());
+            for (Position w : permutation) {
+                assertTrue(w.toString(), 0 <= w.getX() && w.getX() < WIDTH);
+                assertTrue(w.toString(), 0 <= w.getY() && w.getY() < HEIGHT);
+            }
+        }
+    }
+}