Add RelatePredicate unit test

modules/core/src/test/java/org/locationtech/jts/operation/relateng/RelatePredicateTest.java

@@ -0,0 +1,81 @@
+package org.locationtech.jts.operation.relateng;
+
+import org.locationtech.jts.geom.Dimension;
+
+import junit.framework.TestCase;
+import junit.textui.TestRunner;
+
+public class RelatePredicateTest extends TestCase {
+
+  private static final String A_EXT_B_INT = "***.***.1**";
+  private static final String A_INT_B_INT = "1**.***.***";
+
+  public static void main(String args[]) {
+    TestRunner.run(RelatePredicateTest.class);
+  }
+
+  public RelatePredicateTest(String name) {
+    super(name);
+  }
+
+  public void testIntersects() {
+    checkPredicate(RelatePredicate.intersects(), A_INT_B_INT, true);
+  }
+
+  public void testDisjoint() {
+    checkPredicate(RelatePredicate.intersects(), A_EXT_B_INT, false);
+    checkPredicate(RelatePredicate.disjoint(), A_EXT_B_INT, true);
+  }
+
+  public void testCovers() {
+    checkPredicate(RelatePredicate.covers(), A_INT_B_INT, true);
+    checkPredicate(RelatePredicate.covers(), A_EXT_B_INT, false);
+  }
+
+  public void testCoversFast() {
+    checkPredicatePartial(RelatePredicate.covers(), A_EXT_B_INT, false);
+  }
+
+  public void testMatch() {
+    checkPredicate(RelatePredicate.matches("1***T*0**"), "1**.*2*.0**", true);
+  }
+
+  //=======================================================
+
+  private void checkPredicate(TopologyPredicate pred, String im, boolean expected) {
+    applyIM(im, pred);
+    checkPred(pred, expected);    
+  }
+
+  private void checkPredicatePartial(TopologyPredicate pred, String im, boolean expected) {
+    applyIM(im, pred);
+    boolean isKnown = pred.isKnown();
+    assertTrue("predicate value is not known", isKnown);
+    checkPred(pred, expected);
+  }
+
+  private void checkPred(TopologyPredicate pred, boolean expected) {
+    pred.finish();
+    boolean actual = pred.value();
+    assertEquals(expected, actual);
+  }
+
+  private static void applyIM(String imIn, TopologyPredicate pred) {
+    String im = cleanIM(imIn);
+    for (int i = 0; i < 9; i++) {
+      int locA = i / 3;
+      int locB = i - 3 * locA;
+      char entry = im.charAt(i);
+      if (entry == '0' || entry == '1' || entry == '2') {
+        int dim = Dimension.toDimensionValue(entry);
+        pred.updateDimension(locA, locB, dim);
+      }
+    }
+  }
+
+  private static String cleanIM(String im) {
+    String im1 = im.replaceAll("\\.", "");
+    return im1;
+  }
+
+}