org.junit.contrib.java.lang.system
Class StandardErrorStreamLog

java.lang.Object
  org.junit.contrib.java.lang.system.StandardErrorStreamLog

All Implemented Interfaces:

org.junit.rules.TestRule

Deprecated. Please use SystemErrRule.

The StandardErrorStreamLog records writes to the standard error stream. The text written is available via getLog().

   public void MyTest {
     @Rule
     public final StandardErrorStreamLog log = new StandardErrorStreamLog();

     @Test
     public void captureErrorStream() {
       System.err.print("hello world");
       assertEquals("hello world", log.getLog());
     }
   }
 

You can clear the log if you only want to test parts of the text written to the standard error stream.

   @Test
   public void captureErrorStream() {
     System.err.print("before");
     log.clear();
     System.err.print("afterwards");
     assertEquals("afterwards", log.getLog());
   }
 

Prevent output to the standard error stream

In general it is not necessary that a test writes to the standard error stream. Avoiding this output may speed up the test and reduce the clutter on the commandline.

The test does not write to the stream if the rule is created with the LogMode.LOG_ONLY mode.

 @Rule
 public final StandardErrorStreamLog log = new StandardErrorStreamLog(LOG_ONLY);

@Deprecated
public class StandardErrorStreamLog
extends Object
implements org.junit.rules.TestRule

Constructor Summary

StandardErrorStreamLog()
Deprecated. Please use new SystemErrRule().enableLog().

Creates a rule that records writes while they are still written to the standard error stream.

StandardErrorStreamLog(LogMode mode)
Deprecated. Please use new SystemErrRule().enableLog() instead of new StandardErrorStreamLog(LogMode.LOG_AND_WRITE_TO_STREAM) or new SystemErrRule().enableLog().mute() instead of new StandardErrorStreamLog(LogMode.LOG_ONLY).

Creates a rule that records writes to the standard error stream according to the specified LogMode.

Method Summary

org.junit.runners.model.Statement	apply(org.junit.runners.model.Statement base, org.junit.runner.Description description) Deprecated.
void	clear() Deprecated. Please use SystemErrRule.clearLog(). Clears the log. The log can be used again.
String	getLog() Deprecated. Please use SystemErrRule.getLog(). Returns the text written to the standard error stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardErrorStreamLog

public StandardErrorStreamLog()

Deprecated. Please use new SystemErrRule().enableLog().

Creates a rule that records writes while they are still written to the standard error stream.

StandardErrorStreamLog

public StandardErrorStreamLog(LogMode mode)

Deprecated. Please use new SystemErrRule().enableLog() instead of new StandardErrorStreamLog(LogMode.LOG_AND_WRITE_TO_STREAM) or new SystemErrRule().enableLog().mute() instead of new StandardErrorStreamLog(LogMode.LOG_ONLY).

Creates a rule that records writes to the standard error stream according to the specified LogMode.

Parameters:

mode - how the rule handles writes to the standard error stream.

Throws:

NullPointerException - if mode is null.

Method Detail

clear

@Deprecated
public void clear()

Deprecated. Please use SystemErrRule.clearLog().

Clears the log. The log can be used again.

getLog

@Deprecated
public String getLog()

Deprecated. Please use SystemErrRule.getLog().

Returns the text written to the standard error stream.

Returns:

the text written to the standard error stream.

apply

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

Deprecated.

Specified by:

apply in interface org.junit.rules.TestRule