SystemErrRule (System Stubs JUnit4 2.1.8 API)

java.lang.Object
- uk.org.webcompere.systemstubs.resource.SingularTestResource
- - uk.org.webcompere.systemstubs.stream.SystemStreamBase
  - - uk.org.webcompere.systemstubs.stream.SystemErr
    - - uk.org.webcompere.systemstubs.rules.SystemErrRule

All Implemented Interfaces:

org.junit.rules.TestRule, Executable, TestResource, SystemStubTestRule, Output<OutputStream>
```
public class SystemErrRule
extends SystemErr
implements SystemStubTestRule
```
JUnit4 test rule that captures System.err during tests.

Since:

1.0.0

See Also:

SystemErr

Field Summary
- Fields inherited from class uk.org.webcompere.systemstubs.stream.SystemStreamBase
  currentTarget, originalStream, printStreamGetter, printStreamSetter, targetFactory

Constructor Summary

Constructors
Constructor	Description
`SystemErrRule()`	Default constructor, uses a `TapStream` to tap system error while the rule is active
`SystemErrRule(Output<? extends OutputStream> output)`	Construct with an alternative `Output` to use
`SystemErrRule(OutputFactory<? extends OutputStream> outputFactory)`	Construct with a `OutputFactory` for creating output objects from the existing output

Method Summary
- Methods inherited from class uk.org.webcompere.systemstubs.stream.SystemStreamBase
  clear, doSetup, doTeardown, getOutputStream, getText, wrap
- Methods inherited from class uk.org.webcompere.systemstubs.resource.SingularTestResource
  isActive, setup, teardown
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
- Methods inherited from interface uk.org.webcompere.systemstubs.resource.Executable
  execute
- Methods inherited from interface uk.org.webcompere.systemstubs.stream.output.Output
  closeOutput, factoryOfSelf, getLines, getLinesNormalized, getLinesNormalized, getOutput
- Methods inherited from interface uk.org.webcompere.systemstubs.rules.internal.SystemStubTestRule
  apply
- Methods inherited from interface uk.org.webcompere.systemstubs.resource.TestResource
  execute, setup, teardown

- Constructor Detail
  - SystemErrRule
```
public SystemErrRule(Output<? extends OutputStream> output)
```
    Construct with an alternative Output to use
    
    Parameters:
    
    output - the output to write system error to
  - SystemErrRule
```
public SystemErrRule(OutputFactory<? extends OutputStream> outputFactory)
```
    Construct with a OutputFactory for creating output objects from the existing output
    
    Parameters:
    
    outputFactory - the factory to use
  - SystemErrRule
```
public SystemErrRule()
```
    Default constructor, uses a TapStream to tap system error while the rule is active