de.hegmanns.test.utils.rules.consoleredirect

Class ConsoleRedirectRule

java.lang.Object

de.hegmanns.test.utils.rules.consoleredirect.ConsoleRedirectRule

All Implemented Interfaces:

org.junit.rules.TestRule

public class ConsoleRedirectRule
extends Object
implements org.junit.rules.TestRule

This JUnit-Rule redirects the console-output to this rule-instance. If your application do have code like "System.out.println(...)" and you want to check this output, you can use this ConsoleRedirectRule.

 
 public class YourTest{
 
  @Rule
  private ConsoleRedirectRule consoleRedirectRule = ConsoleRedirectRule.instance();
  
  public void yourTestMethod(){
     System.out.println("HalloWelt");
     assertThat(consoleRedirectRule.getOutput(), containsString("HalloWelt"));
     assertThat(consoleRedirectRule.getOutput(), not("HalloWelt"));
  }
  
  public void yourSecondTestMethod(){
     System.out.print("HalloWelt");
     assertThat(consoleRedirectRule.getOutput(), is("HalloWelt"));
  }
 
 }
 
 

Author:

B. Hegmanns

Constructor Summary

Constructors

Constructor and Description
ConsoleRedirectRule()

Method Summary

Modifier and Type	Method and Description
org.junit.runners.model.Statement	apply(org.junit.runners.model.Statement baseStatement, org.junit.runner.Description description)
String	getOutput() Returns the Output.
static ConsoleRedirectRule	instance()

Methods inherited from class java.lang.Object

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

Constructor Detail

ConsoleRedirectRule

public ConsoleRedirectRule()

Method Detail

instance

public static ConsoleRedirectRule instance()

Returns:

a new ConsoleRedirectRule-instance

apply

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

Specified by:

apply in interface org.junit.rules.TestRule

getOutput

public String getOutput()

Returns the Output.

Note:
If the SUT make System.out.println(...), the output contains the linefeeds.

Returns:

the String-output, done via System.out