Add tests for basic image contrast + image contrast with tween + image contrast with crop

test/node-runner.js

@@ -107,6 +107,7 @@ require('./unit/filters/Noise-test.js');
 require('./unit/filters/Threshold-test.js');
 require('./unit/filters/Posterize-test.js');
 require('./unit/filters/Sepia-test.js');
+require('./unit/filters/Contrast-test.js');
 require('./unit/filters/Emboss-test.js');
 require('./unit/filters/Solarize-test.js');
 require('./unit/filters/Kaleidoscope-test.js');

test/runner.html

@@ -59,6 +59,7 @@
     <script src="../src/filters/Pixelate.js" data-cover></script>
     <script src="../src/filters/Threshold.js" data-cover></script>
     <script src="../src/filters/Sepia.js" data-cover></script>
+    <script src="../src/filters/Contrast.js" data-cover></script>
     <script src="../src/filters/Solarize.js" data-cover></script>
     <script src="../src/filters/Kaleidoscope.js" data-cover></script>
 
@@ -164,6 +165,7 @@
     <script src="unit/filters/Threshold-test.js"></script>
     <script src="unit/filters/Posterize-test.js"></script>
     <script src="unit/filters/Sepia-test.js"></script>
+    <script src="unit/filters/Contrast-test.js"></script>
     <script src="unit/filters/Emboss-test.js"></script>
     <script src="unit/filters/Solarize-test.js"></script>
     <script src="unit/filters/Kaleidoscope-test.js"></script>

test/unit/filters/Contrast-test.js

@@ -0,0 +1,102 @@
+suite('Filter Contrast', function() {
+  // ======================================================
+  test('basic', function(done) {
+    var stage = addStage();
+
+    var imageObj = new Image();
+    imageObj.onload = function() {
+      var layer = new Konva.Layer();
+      var darth = new Konva.Image({
+        x: 10,
+        y: 10,
+        image: imageObj,
+        draggable: true
+      });
+
+      layer.add(darth);
+      stage.add(layer);
+
+      darth.cache();
+      darth.filters([Konva.Filters.Contrast]);
+      darth.contrast(40);
+      layer.draw();
+
+      assert.equal(darth.contrast(), 40);
+
+      done();
+    };
+    imageObj.src = 'assets/darth-vader.jpg';
+  });
+
+  // ======================================================
+  test('tween', function(done) {
+    var stage = addStage();
+
+    var imageObj = new Image();
+    imageObj.onload = function() {
+      var layer = new Konva.Layer();
+      var darth = new Konva.Image({
+        x: 10,
+        y: 10,
+        image: imageObj,
+        draggable: true
+      });
+
+      layer.add(darth);
+      stage.add(layer);
+
+      darth.cache();
+      darth.filters([Konva.Filters.Contrast]);
+      darth.contrast(40);
+      layer.draw();
+
+      var tween = new Konva.Tween({
+        node: darth,
+        duration: 2.0,
+        contrast: 0,
+        easing: Konva.Easings.EaseInOut
+      });
+
+      darth.on('mouseover', function() {
+        tween.play();
+      });
+
+      darth.on('mouseout', function() {
+        tween.reverse();
+      });
+
+      done();
+    };
+    imageObj.src = 'assets/darth-vader.jpg';
+  });
+
+  // ======================================================
+  test('crop', function(done) {
+    var stage = addStage();
+
+    var imageObj = new Image();
+    imageObj.onload = function() {
+      var layer = new Konva.Layer();
+      var darth = new Konva.Image({
+        x: 10,
+        y: 10,
+        image: imageObj,
+        crop: {x: 128, y: 48, width: 256, height: 128},
+        draggable: true
+      });
+
+      layer.add(darth);
+      stage.add(layer);
+
+      darth.cache();
+      darth.filters([Konva.Filters.Contrast]);
+      darth.contrast(-40);
+      layer.draw();
+
+      assert.equal(darth.contrast(), -40);
+
+      done();
+    };
+    imageObj.src = 'assets/darth-vader.jpg';
+  });
+});