chapter 02: adding state logAnalyzer

Author: devcorpio

chapter_02-a-first-unit-test/LogAn/logAnalyzer.js

@@ -1,11 +1,25 @@
 const ArgumentError = require('./ArgumentError');
 
 function logAnalyzer() {
+    /**
+     * @type {boolean}
+     */
+    let wasLastFileNameValid;
+
+    /**
+     * @return {boolean}
+     */
+    function getWasLastFilenameValid() {
+        return wasLastFileNameValid;
+    }
+
     /**
      * @param {string} fileName
      * @return {boolean}
      */
     function isValidLogFileName(fileName) {
+        wasLastFileNameValid = false;
+
         if (fileName === '') {
             throw new ArgumentError('filename has to be provided');
         }
@@ -14,10 +28,12 @@ function logAnalyzer() {
             return false;
         }
 
+        wasLastFileNameValid = true;
         return true;
     }
 
     return {
+        getWasLastFilenameValid,
         isValidLogFileName,
     };
 }