[bug fix][add test case] add handle animation short name pattern case

fix a bug in animation short name pattern like "animation: 2s _colon_local(fade-in);"

src/index.js

@@ -224,21 +224,35 @@ const processor = postcss.plugin('postcss-modules-scope', function(options) {
       });
 
       rule.walkDecls(decl => {
+
         let tokens = decl.value.split(/(,|'[^']*'|"[^"]*")/);
 
         tokens = tokens.map((token, idx) => {
           if (idx === 0 || tokens[idx - 1] === ',') {
+
+            let result = token;
+
             const localMatch = /^(\s*):local\s*\((.+?)\)/.exec(token);
+            const nextLocalMatch = /:local\s*\((.+?)\)/.exec(token);
 
             if (localMatch) {
-              return (
+              result = (
                 localMatch[1] +
                 exportScopedName(localMatch[2]) +
                 token.substr(localMatch[0].length)
               );
+            } else if(nextLocalMatch) {
+
+                const input = nextLocalMatch.input;
+                const matchPattern = nextLocalMatch[0];
+                const matchVal = nextLocalMatch[1];
+                const newVal = exportScopedName(matchVal);
+                result = input.replace(matchPattern, newVal);
             } else {
-              return token;
+              // do nothing
             }
+            return result;
+
           } else {
             return token;
           }

test/test-cases/export-keyframes/expected.css

@@ -17,6 +17,14 @@
   animation-name: _input__fade-in;
 }
 
+._input__fadeIn {
+  animation: 2s _input__fade-in;
+}
+
+._input__fadeIn {
+  animation: _input__fade-in 2s;
+}
+
 :export {
   fadeIn: _input__fadeIn;
   fade-in: _input__fade-in;

test/test-cases/export-keyframes/source.css

@@ -16,3 +16,11 @@
 :local(.fadeIn) {
   animation-name: _colon_local(fade-in);
 }
+
+:local(.fadeIn) {
+  animation: 2s _colon_local(fade-in);
+}
+
+:local(.fadeIn) {
+  animation: _colon_local(fade-in) 2s;
+}