JUnit asserting two Strings whether they're equal or not
11,039
PrintStream#println(String str)
appends a newline at the end of the string. Therefore, your assertion should trim down the additional line:
assertEquals(outStream.toString().trim(),"Hi");
Author by
NhatNienne
Updated on June 05, 2022Comments
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NhatNienne almost 2 years
So I looked up this question and tried it, but with no success.
My code should be testing if the method is correctly outputing the text onto the console by reading it back in using
Streams
.ByteArrayOutputStream outStream = new ByteArrayOutputStream(); PrintStream myStream = new PrintStream(outStream); System.setOut(myStream); o.doSomething(); //printing out Hi System.out.flush(); System.setOut(savedOldStream);//setting it back to System.out assertEquals(outStream.toString(),"Hi");
but everytime I run JUnit it fails. I also tried:
assertTrue(outStream.toString().equals("Hi"));
but this didn't work either.This is the doSomething() method:
public void doSomething () { System.out.println("Hi"); }
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Jesper almost 9 yearsWriting to
System.out
will not write anything in theByteArrayOutputStream
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NhatNienne almost 9 yearsThank you very much! SO using System.out.print would also fix the problem?
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M A almost 9 years@Jesper The OP has re-assigned
System.out
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M A almost 9 years@NhatNienne Yes using
print
would avoid the newline. -
M A almost 9 yearsAgree. For this case, the OP could do as you suggested: passing the output stream as param.