Testing apex:selectList when implemented using Custom Labels

Question

I have a VF page where I am appending labels/values to a dropdown input from Custom Labels, like this:

<apex:selectList label="{!$Label.Type}" value="{!lstInputs.typeValue}" multiselect="false" size="1">
   <apex:selectOption itemValue="{!$Label.Option1}" itemLabel="{!$Label.Label1}"/>
   <apex:selectOption itemValue="{!$Label.Option2}" itemLabel="{!$Label.Label2}"/>
</apex:selectList>
<apex:commandButton value="{!$Label.Submit}"  action="{!callImplementor}" reRender="refresh"/>

I am using a Wrapper class to access all variables from my VF page. In my actual controller, I am using a method that gets this wrapper record as a parameter and builds a HTTP request.

public pagereference callImplementor() {
  try {
        implementor(lstInputs);
  } catch (Exception ex){

  }
}
public HttpRequest implementor(InputWrapper inp) {
    String selectedValue = (inp.typeValue != null ? inp.typeValue : '');
    System.debug('selectedValue :' +selectedValue);
    <--some code -->
}
//Wrapper
public class InputWrapper {
   public string typeValue {get; set;}
   //Other variables. 
}

Test class:

public static String adjValue = 'Option1';
  //test method
  static testmethod void testForCalloutSuccess(){
    Pagereference testPage = Page.MyVFPage;
    test.setCurrentPageReference(testPage);
    testPage.getParameters().put('acctId', actId);

    Test.startTest();

    MyControllerClass ctrl = new MyControllerClass();
    MyControllerClass.InputWrapper lstInput = new MyControllerClass.InputWrapper();
    lstInput.typeValue = adjValue;

    ctrl.callImplementor();
    //ctrl.implementor(lstInput);
    Test.stopTest(); 
}

I am getting my selectedValue as null in my test class. If I declare a test wrapper record, and call the method implementor(InputWrapper inp) by passing this record, some other field values are getting null as some values are set from constructor. How can I set the test data for this <apex:selectList> dropdown field from VF page?

Answer 1

Your problem is most likely here:

MyControllerClass ctrl = new MyControllerClass();
MyControllerClass.InputWrapper lstInput = new MyControllerClass.InputWrapper();
lstInput.typeValue = adjValue;

this should be:

MyControllerClass ctrl = new MyControllerClass();
ctrl.lstInput = new MyControllerClass.InputWrapper();
ctrl.lstInput.typeValue = adjValue;

That is, you may have some confusion between static variables in your controller that should be object variables.

Answer 2

After diving deep, I was able to simulate test data. Thanks to @cropredy for making me think loud. Just to add to my actual test method from my post,

Test.startTest();

MyControllerClass ctrl = new MyControllerClass();
MyControllerClass.InputWrapper lstInput = new MyControllerClass.InputWrapper();
ctrl.lstInput.typeValue = adjValue; //This is the way I should append(simulate) the test data. 
ctrl.callImplementor();

Test.stopTest();