add keyframe test cases

Author: tj

examples/keyframes.css

@@ -0,0 +1,8 @@
+@-webkit-keyframes fade {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}

examples/keyframes.js

@@ -0,0 +1,12 @@
+
+/**
+ * Module dependencies.
+ */
+
+var parse = require('css-parse')
+  , stringify = require('..')
+  , fs = require('fs')
+  , read = fs.readFileSync
+  , css = read('examples/keyframes.css', 'utf8');
+
+console.log(stringify(parse(css), { compress: true }));

test/cases/keyframes.css

@@ -0,0 +1,9 @@
+@keyframes fade {
+  from {
+    opacity: 0;
+  }
+
+  to {
+    opacity: 1;
+  }
+}

test/cases/keyframes.json

@@ -0,0 +1,33 @@
+{
+  "stylesheet": {
+    "rules": [
+      {
+        "name": "fade",
+        "keyframes": [
+          {
+            "values": [
+              "from"
+            ],
+            "declarations": [
+              {
+                "property": "opacity",
+                "value": "0"
+              }
+            ]
+          },
+          {
+            "values": [
+              "to"
+            ],
+            "declarations": [
+              {
+                "property": "opacity",
+                "value": "1"
+              }
+            ]
+          }
+        ]
+      }
+    ]
+  }
+}