Package org.junit.contrib.java.lang.system

Class DisallowWriteToSystemOut

java.lang.Object

org.junit.contrib.java.lang.system.DisallowWriteToSystemOut

All Implemented Interfaces:

org.junit.rules.TestRule

public class DisallowWriteToSystemOut
extends java.lang.Object
implements org.junit.rules.TestRule

DisallowWriteToSystemOut lets a test fail if it tries to write something to System.out.

For that purpose you only have to add DisallowWriteToSystemOut rule to your test class

 public class TestClass {
   @Rule
   public final DisallowWriteToSystemOut disallowWriteToSystemOut
     = new DisallowWriteToSystemOut();

   @Test
   public void this_test_fails() {
     System.out.println("some text");
   }
 }
 

Since:

1.14.0

See Also:

DisallowWriteToSystemErr

Constructor Summary

Constructors

Constructor	Description
DisallowWriteToSystemOut()

Method Summary

Modifier and Type	Method	Description
org.junit.runners.model.Statement	apply(org.junit.runners.model.Statement base, org.junit.runner.Description description)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DisallowWriteToSystemOut

public DisallowWriteToSystemOut()

Method Detail

apply

public org.junit.runners.model.Statement apply(org.junit.runners.model.Statement base,
                                               org.junit.runner.Description description)

Specified by:

apply in interface org.junit.rules.TestRule