SystemOutAndErrSwapper (Grails 6.2.1)

org.grails.test.io.SystemOutAndErrSwapper

```
@groovy.transform.CompileStatic
class SystemOutAndErrSwapper
extends java.lang.Object
```
Convenience class to temporarily swap in an output stream for standard error and standard out.

Nested Class Summary

Nested classes
Modifiers	Name	Description
`static class`	`SystemOutAndErrSwapper.TestOutputCapturingPrintStream`

Field Summary

Fields
Modifiers	Name	Description
`private boolean`	`echoErr`
`private boolean`	`echoOut`
`protected boolean`	`swapped`
`protected java.io.PrintStream`	`swappedInErr`
`protected java.io.OutputStream`	`swappedInErrStream`
`protected java.io.PrintStream`	`swappedInOut`
`protected java.io.OutputStream`	`swappedInOutStream`
`protected java.io.PrintStream`	`swappedOutErr`
`protected java.io.PrintStream`	`swappedOutOut`

Properties Summary

Properties
Type	Name and description
`boolean`	`echoErr`
`boolean`	`echoOut`

Constructor Summary

Constructors
Constructor and description
`SystemOutAndErrSwapper (boolean echoOut, boolean echoErr)`

Methods Summary

Methods
Type Params	Return Type	Name and description
	`boolean`	`isSwapped()`
	`java.util.List<java.io.OutputStream>`	`swapIn()` Replaces System.out and System.err with PrintStream's wrapping outStream and errStream
	`java.util.List<java.io.OutputStream>`	`swapIn(java.io.OutputStream outStream, java.io.OutputStream errStream)` Replaces System.out and System.err with PrintStream's wrapping outStream and errStream
	`java.util.List<java.io.OutputStream>`	`swapOut()` Restores System.out and System.err to what they were before swappedIn() was called.

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class java.lang.Object`	`java.lang.Object#wait(long, int), java.lang.Object#wait(), java.lang.Object#wait(long), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll()`

- Field Detail
  - private final boolean echoErr
  - private final boolean echoOut
  - protected boolean swapped
  - protected java.io.PrintStream swappedInErr
  - protected java.io.OutputStream swappedInErrStream
  - protected java.io.PrintStream swappedInOut
  - protected java.io.OutputStream swappedInOutStream
  - protected java.io.PrintStream swappedOutErr
  - protected java.io.PrintStream swappedOutOut
- Property Detail
  - final boolean echoErr
  - final boolean echoOut
- Constructor Detail
  - SystemOutAndErrSwapper(boolean echoOut, boolean echoErr)
- Method Detail
  - boolean isSwapped()
  - java.util.List<java.io.OutputStream> swapIn()
    
    Replaces System.out and System.err with PrintStream's wrapping outStream and errStream
    throws:
    IllegalStateException if a swap is already on
    
    Returns:
    [outStream, errStream]
  - java.util.List<java.io.OutputStream> swapIn(java.io.OutputStream outStream, java.io.OutputStream errStream)
    
    Replaces System.out and System.err with PrintStream's wrapping outStream and errStream
    throws:
    IllegalStateException if a swap is already on
    
    Returns:
    [outStream, errStream]
  - java.util.List<java.io.OutputStream> swapOut()
    
    Restores System.out and System.err to what they were before swappedIn() was called.
    throws:
    IllegalStateException if not in a swap
    
    Returns:
    the underlying output streams for the swap ([out, err])

Groovy Documentation

[Groovy] Class SystemOutAndErrSwapper

Nested Class Summary

Field Summary

Properties Summary

Constructor Summary

Methods Summary

Inherited Methods Summary

Field Detail

private final boolean echoErr

private final boolean echoOut

protected boolean swapped

protected java.io.PrintStream swappedInErr

protected java.io.OutputStream swappedInErrStream

protected java.io.PrintStream swappedInOut

protected java.io.OutputStream swappedInOutStream

protected java.io.PrintStream swappedOutErr

protected java.io.PrintStream swappedOutOut

Property Detail

final boolean echoErr

final boolean echoOut

Constructor Detail

SystemOutAndErrSwapper(boolean echoOut, boolean echoErr)

Method Detail

boolean isSwapped()

java.util.List<java.io.OutputStream> swapIn()

java.util.List<java.io.OutputStream> swapIn(java.io.OutputStream outStream, java.io.OutputStream errStream)

java.util.List<java.io.OutputStream> swapOut()