In this post, I am going to explain how to mock Static non-void private methods.
Following snippet is used to mock the static non-void private method ‘readInputFromUI’.
String message = "Enter a number";
String methodToMock = "readInputFromUI";
PowerMock.mockStaticPartial(InputUtil.class, methodToMock);
PowerMock.expectPrivate(InputUtil.class, methodToMock, message).andReturn(10).times(1);
Following is the complete working application.
InputUtil.java
package com.sample.tests;
import javax.swing.JOptionPane;
public class InputUtil {
public static int readInput(String message){
return readInputFromUI(message);
}
private static int readInputFromUI(String message){
int number = Integer.parseInt(JOptionPane.showInputDialog(message));
return number;
}
}
InputUtilTest.java
package com.sample.tests;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.easymock.PowerMock;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
@RunWith(PowerMockRunner.class)
@PrepareForTest({ InputUtil.class })
public class InputUtilTest {
@Test
public void mockVoidEvenMethod() throws Exception {
String message = "Enter a number";
String methodToMock = "readInputFromUI";
PowerMock.mockStaticPartial(InputUtil.class, methodToMock);
PowerMock.expectPrivate(InputUtil.class, methodToMock, message).andReturn(10).times(1);
PowerMock.replayAll();
int number = InputUtil.readInput(message);
assertEquals(number, 10);
PowerMock.verifyAll();
}
}
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This post first appeared on Java Tutorial : Blog To Learn Java Programming, please read the originial post: here
