refactor json reporter

Author: CheadleCheadle

lib/reporters/json.js

@@ -81,8 +81,11 @@ function JSONReporter(runner, options = {}) {
     var optionsIndentSize;
     if (options.reporterOption && 'indentSize' in options.reporterOption) {
       optionsIndentSize = options.reporterOption.indentSize;
+    } else {
+      optionsIndentSize = 2; // Default Indentation size
     }
-    var indentSize = parseInt(optionsIndentSize, 10) || 2; // Cast string to int or default indentation
+
+    var indentSize = parseInt(optionsIndentSize, 10); // Cast string to int
 
     var json = JSON.stringify(obj, null, indentSize);
     if (output) {