From: 7stud -- <dolgun@...>
Date: 2007-10-01T18:40:22+09:00
Subject: Re: unit testing: example p. 156 pickaxe2

7stud -- wrote:
> How do you make this example fail:
> 
> require "test/unit"
> 
> class TestsWhichFail < Test::Unit::TestCase
>   def test_reading
>     assert_not_nil(ARGF.read, "Read next line of input")
>   end
> end
> 

If I add this line:

ARGF.read   #<---***
assert_not_nil(ARGF.read, "Read next line of input")

and I specify a data file name on the command line, then the test fails. 
Curiously, if I omit specifying a data file name on the command line, 
and I type ^D while the program is running, I can't get the test to 
fail.




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