Whitebox: get the value of static property

In my previous post, I explained how to get the value of instance property. In this post, I am going to explain how to get the value of static property.

Whitebox class provides method 'getInternalState' to get the state of instance property.

public static <T> T getInternalState(Object object, String fieldName)

public static <T> T getInternalState(Object object, String fieldName, Class<?> where)

public static <T> T getInternalState(Object object, Class<T> fieldType)

public static <T> T getInternalState(Object object, Class<T> fieldType, Class<?> where)

Following snippet is used to get the value associated static property ‘count’.

int count = Whitebox.getInternalState(Employee.class, "count");

assertEquals(count, 1);

Employee.java

package com.sample.model;

public class Employee {
 private int id;
 private String firstName;
 private String lastName;
 private static int count = 0;

 public Employee(int id, String firstName, String lastName) {
  count++;
  this.id = id;
  this.firstName = firstName;
  this.lastName = lastName;
 }

}

EmployeeTest.java

package com.sample.model;

import static org.junit.Assert.assertEquals;

import org.junit.Test;
import org.powermock.reflect.Whitebox;

public class EmployeeTest {

 @Test
 public void Employee_DefaultConstructor() {

  new Employee(1, "Hari Krishna", "Gurram");

  int count = Whitebox.getInternalState(Employee.class, "count");
  assertEquals(count, 1);

  new Employee(1, "Hari Krishna", "Gurram");
  count = Whitebox.getInternalState(Employee.class, "count");
  assertEquals(count, 2);

  new Employee(1, "Hari Krishna", "Gurram");
  count = Whitebox.getInternalState(Employee.class, "count");
  assertEquals(count, 3);

 }

}

Previous                                                 Next                                                 Home