From: Rob Sanheim <rsanheim@...>
Date: 2006-12-06T13:51:52+09:00
Subject: Re: Why does a test fail when I predicted it's exception class?

Hi,

<snip>
> Your answers here solved a problem I posted yesterday about another
> messed up test. I have now deleted that post because "I've seen the
> light."
>
> Below is a toy testing setup.  I stuck with my numbered approach for
> the moment because it fit these tests.  This setup worked quite nicely.
> If you're in the mood to comment on them,  I'd be a grateful recipient.
>  But I think I'm OK on this topic now.  Incidentally,  I thought about
> trying to use lamda expressions to reduce the duplication, but enough
> is enough.

Why do you want to number your tests?  Your tests should be written in
such a way that they don't depend upon the order they run, so
numbering them to try and get a specific order is a bad idea.  If its
just to get a nice output when you run the suite, you should look at
tweaking the test runner or autotest or whatever you use to run your
tests.

> Again, thank you for providing such thoughtful comments.
>
> Best wishes,
> Richard
>
> SetupTeardown.rb
> =============
> class Foo
>   MyConst = "Foo's Constant"
>   def initialize(n)
>         @n = n
>   end
>   def bar
>       "I'm Foo#bar with #{MyConst}#{@n}"
>   end
> end
>
> puts Foo.new(1).bar if __FILE__ == $0
>
> TestSetupTeardown.rb
> ================
> # "TestSetupTeardown"
>
> require 'test/unit'
> require 'tc_Test1'
>
> tc_Test.rb
> ========
> require './SetupTeardown'
> require 'test/unit'
> class TestST < Test::Unit::TestCase
>   def setup
>         @instance1 = Foo.new(1)
>         @instance2 = Foo.new(2)
>   end
>   def teardown
>         @instance1  = nil
>         @instance2  = nil

You don't need to set these to nil, as a new instance of the test
class will be create for each test case.  You normally only see
teardown used for things like closing a database connection, making
sure a stubbed method gets removed, etc.

>   end
>   def test1
>     assert_equal("I'm Foo#bar with Foo's Constant1",
>             @instance1.bar)
>     assert_equal("I'm Foo#bar with Foo's Constant2",
>             @instance2.bar)
>   end
> end

- Rob