diff --git a/lib/converter/converter.js b/lib/converter/converter.js
index b94525ef..4c7eb073 100644
--- a/lib/converter/converter.js
+++ b/lib/converter/converter.js
@@ -177,6 +177,28 @@ const updateLinesCount = (lineMap, sLoc, eLoc, count) => {
 
 };
 
+const getSourceAstInfo = (positionMapping) => {
+    const ast = acornLoose.parse(positionMapping.source, {
+        ecmaVersion: 'latest'
+    });
+
+    const functions = [];
+    acornWalk.simple(ast, {
+        // Function include FunctionDeclaration, ArrowFunctionExpression, FunctionExpression
+        Function(node) {
+            functions.push(node);
+        }
+    });
+
+    // sort
+    functions.sort((a, b) => {
+        return a.start - b.start;
+    });
+
+    return {
+        functions
+    };
+};
 
 const initFileCoverage = (positionMapping, type, sourcePath) => {
 
@@ -215,29 +237,25 @@ const initFileCoverage = (positionMapping, type, sourcePath) => {
     const functions = [];
     // only for js
     if (type === 'js') {
-        const ast = acornLoose.parse(positionMapping.source, {
-            ecmaVersion: 'latest'
-        });
-        acornWalk.simple(ast, {
-            // Function include FunctionDeclaration, ArrowFunctionExpression, FunctionExpression
-            Function(node) {
-                const sLoc = positionMapping.offsetToLocation(node.start);
-                const eLoc = positionMapping.offsetToLocation(node.end);
-                const functionName = node.id && node.id.name;
-                const functionInfo = new InfoFunction(sLoc, eLoc, 0, functionName);
-
-                const { line, column } = sLoc;
-
-                let funLineMap = functionMap.get(line);
-                if (!funLineMap) {
-                    funLineMap = new Map();
-                    functionMap.set(line, funLineMap);
-                }
-                funLineMap.set(column, functionInfo);
-
-                functions.push(functionInfo);
+        const astInfo = getSourceAstInfo(positionMapping);
+        astInfo.functions.forEach((node) => {
+            const sLoc = positionMapping.offsetToLocation(node.start);
+            const eLoc = positionMapping.offsetToLocation(node.end);
+            const functionName = node.id && node.id.name;
+            const functionInfo = new InfoFunction(sLoc, eLoc, 0, functionName);
+
+            const { line, column } = sLoc;
+
+            let funLineMap = functionMap.get(line);
+            if (!funLineMap) {
+                funLineMap = new Map();
+                functionMap.set(line, funLineMap);
             }
+            funLineMap.set(column, functionInfo);
+
+            functions.push(functionInfo);
         });
+
     }
 
     return {