Added more unit tests

utils/fileio.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"io/ioutil"
 	"os"
 )
 
@@ -19,3 +20,13 @@ func InitOutputDirectory(path string) {
 		os.MkdirAll(path, os.ModePerm)
 	}
 }
+
+// ReadFileToString - Reads file and returns content
+func ReadFileToString(path string) string {
+	content, err := ioutil.ReadFile(path)
+	if err != nil {
+		panic(err)
+	}
+
+	return string(content)
+}