[PJUG Javamail] can I do text/diff-based testing with JUnit?

[Lyle T. Harris]

How about leveraging some Groovy as put forward in the last presentation.

List golden  = new File("Golden.txt").readLines();
List current = new File("CurrentTest.txt").readLines();

assertTrue(current.containsAll(golden));
assertTrue(golden.containsAll(current));

You could also just write an equivalent

     List readLines(File file);

method in Java yourself.




Send Here wrote:
> I recently started using JUnit and previously used a custom in-house 
> testing environment which was heavily text-based.  The old environment 
> is no longer available.  I'm wondering if there's an easy way to adapt 
> JUnit to text-based/diff-based testing, or if I should use another 
> testing framework entirely, or if I am just abusing JUnit and should 
> find a way to use it how it expects to be used.
>
> By "text-based" I mean every testcase produces some kind of text 
> output which can be saved into a file and diff'ed against a previously 
> approved text output (aka golden reference).  The first time you 
> create a testcase, you visually inspect the text and see if it is ok:
>    This is the first line of text output
>    I expect this result on the second line
>    And this on the third line
> If that's good, you copy the output to a golden reference area, and 
> then the next time you run it if the current results have a diff then 
> you know you have something to fix:
>    > I didn't expect this on the second line
>
> I suppose I could read the text as an array of Strings and write a 
> bunch of JUnit assert stmts for this instead, e.g.
>    assertEquals(lines[0], "This is the first line of text output");
>    assertEquals(lines[1], "I expect this result on the second line");
>    assertEquals(lines[2], "And this on the third line");
> ...but that will become very cumbersome very quickly when there is a 
> lot of output, and also cumbersome when you change things 
> intentionally and need to update the golden reference.
>
>
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