implement @tschaub's suggestions for the LIKE function

test/spec/ol/expr/expression.test.js

@@ -758,6 +758,36 @@ describe('ol.expr.lib', function() {
 
   });
 
+  describe('like()', function() {
+
+    var one = new ol.Feature({foo: 'bar'});
+    var two = new ol.Feature({foo: 'baz'});
+    var three = new ol.Feature({foo: 'foo'});
+
+    var like = parse('like(foo, "ba")');
+
+    it('First and second feature match, third does not', function() {
+      expect(evaluate(like, one), true);
+      expect(evaluate(like, two), true);
+      expect(evaluate(like, three), false);
+    });
+
+    var uclike = parse('like(foo, "BA")');
+    it('Matchcase is true by default', function() {
+      expect(evaluate(uclike, one), false);
+      expect(evaluate(uclike, two), false);
+      expect(evaluate(uclike, three), false);
+    });
+
+    var ilike = parse('like(foo, "BA", "*", ".", "!", false)');
+    it('Using matchcase false, first two features match again', function() {
+      expect(evaluate(ilike, one), true);
+      expect(evaluate(ilike, two), true);
+      expect(evaluate(uclike, three), false);
+    });
+
+  });
+
 });
 
 describe('ol.expr.register()', function() {