Add whiteness & blackness (methods using hwb() channel)

Close #1 Fix #2
ianstormtaylor · Jul 23, 2014 · 0b615d3 · 0b615d3
1 parent ae0a394
commit 0b615d3
Show file tree

Hide file tree

Showing 2 changed files with 37 additions and 1 deletion.
diff --git a/package.json b/package.json
@@ -18,7 +18,7 @@
   "dependencies": {
     "rgb": "~0.1.0",
     "debug": "~0.7.4",
-    "color": "~0.6.0",
+    "color": "~0.7.0",
     "balanced-match": "0.1.0"
   }
 }
diff --git a/test/convert.js b/test/convert.js
@@ -199,6 +199,42 @@ describe('#convert', function () {
     });
   });
 
+  describe('whiteness', function () {
+    it('should set whiteness', function () {
+      convert('hwb(0, 0%, 0%) whiteness(20%)', 'rgb(255, 51, 51)'); // hwb(0, 20%, 0%)
+    });
+
+    it('should add whiteness', function () {
+      convert('hwb(0, 75%, 0%) whiteness(+25%)', 'rgb(255, 255, 255)'); // hwb(0, 100%, 0%)
+    });
+
+    it('should substract whiteness', function () {
+      convert('hwb(0, 30%, 0%) whiteness(-10%)', 'rgb(255, 51, 51)'); // hwb(0, 20%, 0%)
+    });
+
+    it('should multiply whiteness', function () {
+      convert('hwb(0, 50%, 0%) whiteness(*2)', 'rgb(255, 255, 255)'); // hwb(0, 100%, 0%)
+    });
+  });
+
+  describe('blackness', function () {
+    it('should set blackness', function () {
+      convert('hwb(0, 0%, 0%) blackness(20%)', 'rgb(204, 0, 0)'); // hwb(0, 0%, 20%)
+    });
+
+    it('should add blackness', function () {
+      convert('hwb(0, 0%, 75%) blackness(+25%)', 'rgb(0, 0, 0)'); // hwb(0, 0%, 100%)
+    });
+
+    it('should substract blackness', function () {
+      convert('hwb(0, 0%, 30%) blackness(-10%)', 'rgb(204, 0, 0)'); // hwb(0, 0%, 20%)
+    });
+
+    it('should multiply blackness', function () {
+      convert('hwb(0, 0%, 50%) blackness(*2)', 'rgb(0, 0, 0)'); // hwb(0, 0%, 100%)
+    });
+  });
+
   describe('blend', function () {
     it('should blend two colors', function () {
       convert('red blend(black 50%)', 'rgb(128, 0, 0)');