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 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

Field Summary

Fields

Modifier and Type	Field	Description
private final DisallowWrite	disallowWrite

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

Field Details

disallowWrite

private final DisallowWrite disallowWrite

Constructor Details

DisallowWriteToSystemOut

public DisallowWriteToSystemOut()

Method Details

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