Standardizing color ranges (see #129)

test/ol.html

@@ -72,6 +72,7 @@
   <!-- include spec files here... -->
   <script type="text/javascript" src="spec/ol/array.test.js"></script>
   <script type="text/javascript" src="spec/ol/collection.test.js"></script>
+  <script type="text/javascript" src="spec/ol/color.test.js"></script>
   <script type="text/javascript" src="spec/ol/extent.test.js"></script>
   <script type="text/javascript" src="spec/ol/map.test.js"></script>
   <script type="text/javascript" src="spec/ol/object.test.js"></script>

test/spec/ol/color.test.js

@@ -0,0 +1,73 @@
+describe('ol.Color', function() {
+
+  describe('constructor', function() {
+
+    it('limits r to 0-255', function() {
+      var c;
+
+      // legit r
+      c = new ol.Color(10.5, 11, 12, 0.5);
+      expect(c.r).toBe(10.5);
+
+      // under r
+      c = new ol.Color(-10, 11, 12, 0.5);
+      expect(c.r).toBe(0);
+
+      // over r
+      c = new ol.Color(300, 11, 12, 0.5);
+      expect(c.r).toBe(255);
+    });
+
+    it('limits g to 0-255', function() {
+      var c;
+
+      // legit g
+      c = new ol.Color(10, 11.5, 12, 0.5);
+      expect(c.g).toBe(11.5);
+
+      // under g
+      c = new ol.Color(10, -11, 12, 0.5);
+      expect(c.g).toBe(0);
+
+      // over g
+      c = new ol.Color(10, 275, 12, 0.5);
+      expect(c.g).toBe(255);
+    });
+
+    it('limits b to 0-255', function() {
+      var c;
+
+      // legit b
+      c = new ol.Color(10, 11, 12.5, 0.5);
+      expect(c.b).toBe(12.5);
+
+      // under b
+      c = new ol.Color(10, 11, -12, 0.5);
+      expect(c.b).toBe(0);
+
+      // over b
+      c = new ol.Color(10, 11, 500, 0.5);
+      expect(c.b).toBe(255);
+    });
+
+    it('limits 1 to 0-1', function() {
+      var c;
+
+      // legit a
+      c = new ol.Color(10, 11, 12, 0.5);
+      expect(c.a).toBe(0.5);
+
+      // under a
+      c = new ol.Color(10, 11, 12, -0.5);
+      expect(c.a).toBe(0);
+
+      // over a
+      c = new ol.Color(10, 11, 12, 2.5);
+      expect(c.a).toBe(1);
+    });
+
+  });
+
+});
+
+goog.require('ol.array');