fix css parse error handling (fixes #5)

lib/postcssToCsso.js

@@ -21,9 +21,19 @@ function getInfo(node) {
 }
 
 function parseToCsso(str, context, node) {
-    var cssoNode = parse(str, {
-        context: context
-    });
+    var cssoNode;
+
+    try {
+        cssoNode = parse(str, {
+            context: context
+        });
+    } catch (e) {
+        if (e.name === 'CssSyntaxError') {
+            throw node.error(e.message, { index: e.parseError.offset });
+        }
+
+        throw e;
+    }
 
     cssoNode.info = getInfo(node);
 
@@ -69,8 +79,7 @@ function postcssToCsso(node) {
         case 'decl':
             return parseToCsso(
                 (node.raws.before || '').trimLeft() +
-                node.prop + ':' + node.value +
-                (node.important ? '!important' : ''),
+                node.toString(),
                 'declaration',
                 node
             );

package.json

@@ -39,7 +39,7 @@
     "travis": "npm run codestyle-and-test"
   },
   "dependencies": {
-    "csso": "^2.0.0",
+    "csso": "^2.1.0",
     "postcss": "^5.0.0"
   },
   "devDependencies": {

test.js

@@ -111,6 +111,18 @@ it('should keep the shape of original postcss nodes', function() {
     });
 });
 
+it('error handling', function() {
+    return postcss([
+        postcssCsso
+    ]).process('.test { color: * }').then(function() {
+        assert(false, 'shouldn\'t to be successful');
+    }, function(error) {
+        assert.equal(error.name, 'CssSyntaxError');
+        assert.equal(error.line, 1);
+        assert.equal(error.column, 16);
+    });
+});
+
 // currently works only is used as linked package
 // TODO: find the way to use csso compress tests
 try {