org.junit.contrib.java.lang.system

Class TextFromStandardInputStream

java.lang.Object

org.junit.rules.ExternalResource

org.junit.contrib.java.lang.system.TextFromStandardInputStream

All Implemented Interfaces:

org.junit.rules.TestRule

public class TextFromStandardInputStream
extends org.junit.rules.ExternalResource

The TextFromStandardInputStream rule replaces System.in with another InputStream, which provides an arbitrary text. The original System.in is restored after the test.

   public void MyTest {
     @Rule
     public final TextFromStandardInputStream systemInMock
       = emptyStandardInputStream();

     @Test
     public void readTextFromStandardInputStream() {
       systemInMock.provide("foo");
       Scanner scanner = new Scanner(System.in);
       assertEquals("foo", scanner.nextLine());
     }
   }
 

Constructor Summary

Constructors

Constructor and Description
TextFromStandardInputStream(java.lang.String text) Deprecated. use provideText(String)

Method Summary

Modifier and Type	Method and Description
protected void	after()
protected void	before()
static TextFromStandardInputStream	emptyStandardInputStream()
void	provideText(java.lang.String text)

Methods inherited from class org.junit.rules.ExternalResource

apply

Methods inherited from class java.lang.Object

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

Constructor Detail

TextFromStandardInputStream

@Deprecated
public TextFromStandardInputStream(java.lang.String text)

Deprecated. use provideText(String)

Create a new TextFromStandardInputStream, which provides the specified text.

Parameters:

text - this text is return by System.in.

Method Detail

emptyStandardInputStream

public static TextFromStandardInputStream emptyStandardInputStream()

provideText

public void provideText(java.lang.String text)

before

protected void before()
               throws java.lang.Throwable

Overrides:

before in class org.junit.rules.ExternalResource

Throws:

java.lang.Throwable

after

protected void after()

Overrides:

after in class org.junit.rules.ExternalResource