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Jake Benilov

2008-Oct-18 16:13 UTC

[rspec-users] Problems when programmatically defining examples

Hi,

I am trying to code an application that is based on Rspec; I am
programmatically building examples, and launching the runner with a custom
formatter. Here are the code snippets from my app:

Launching the runner:

                example_groups test_expectation.example_groups_for(system_state)

                @output = StringIO.new
                options =
Spec::Runner::OptionParser.parse(["--format",
"RAutotest::Runner::Formatter"], @output, @output)
                example_groups.each {|example_group|
options.add_example_group(example_group) }

                Spec::Runner::CommandLine.run(options)

Building the example groups:

                    examples
Class.new(Spec::Example::ExampleGroup).describe("Statistics")
                    @expectations.map do |expectation|
                        examples.it examples.description do
                            actual_stats_counters.should expectation
                        end
                    end
                    examples

This is working fine, except for one problem. When I am writing examples for
my app (also using rspec), the examples that are generated within my
application (the inner examples, so to say) are being added to the
application''s examples (the outer examples).
This means that if inner expected failures are causing my outer examples to
fail.

How is it possible for me to verify expected failures without causing my
examples to fail?

Thanks in advance,
Jake
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David Chelimsky

2008-Oct-18 16:50 UTC

head link

[rspec-users] Problems when programmatically defining examples

On Sat, Oct 18, 2008 at 2:13 PM, Jake Benilov <benilov at gmail.com>
wrote:> Hi,
>
> I am trying to code an application that is based on Rspec; I am
> programmatically building examples, and launching the runner with a custom
> formatter. Here are the code snippets from my app:
>
> Launching the runner:
>
>                 example_groups >
test_expectation.example_groups_for(system_state)
>
>                 @output = StringIO.new
>                 options =
Spec::Runner::OptionParser.parse(["--format",
> "RAutotest::Runner::Formatter"], @output, @output)
>                 example_groups.each {|example_group|
> options.add_example_group(example_group) }
>
>                 Spec::Runner::CommandLine.run(options)
>
> Building the example groups:
>
>                     examples >
Class.new(Spec::Example::ExampleGroup).describe("Statistics")
>                     @expectations.map do |expectation|
>                         examples.it examples.description do
>                             actual_stats_counters.should expectation
>                         end
>                     end
>                     examples
>
> This is working fine, except for one problem. When I am writing examples
for
> my app (also using rspec), the examples that are generated within my
> application (the inner examples, so to say) are being added to the
> application''s examples (the outer examples).
> This means that if inner expected failures are causing my outer examples to
> fail.
>
> How is it possible for me to verify expected failures without causing my
> examples to fail?
If I understand your question correctly, you can do this:

lambda {
  # stuff that should fail
}.should raise_error(Spec::Expectations::ExpectationNotMetError)

See http://rspec.rubyforge.org/rspec/1.1.8/classes/Spec/Matchers.html#M000434
for more info.

Cheers,
David
>
> Thanks in advance,
> Jake
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>

Jake Benilov

2008-Oct-18 22:34 UTC

head link

[rspec-users] Problems when programmatically defining examples

David,

Thanks for your reply; however I probably wasn''t very clear in my
explanation. What I am really trying to do is to create a builder for
example group objects, without automatically adding the example groups to
the rspec runner when the builder code is invoked.

As an example, when I call the following code:

describe "a group" do
    examples =
Class.new(Spec::Example::ExampleGroup).describe("example")
    examples.it "should not be added to the outer group" do
        true.should be_false
    end
end

I get:
~~~
1)
''example should not be added to the outer group'' FAILED
expected false, got true

Finished in 0.027012 seconds

1 example, 1 failure
~~~
This is probably expected, but what I really want is that the
"examples"
example group is NOT picked up by rspec. I suppose that I need to stay away
from the "it" and "describe" methods... right?

Regards,
Jake

On Sat, Oct 18, 2008 at 6:50 PM, David Chelimsky <dchelimsky at
gmail.com>wrote:
> On Sat, Oct 18, 2008 at 2:13 PM, Jake Benilov <benilov at gmail.com>
wrote:
> > Hi,
> >
> > I am trying to code an application that is based on Rspec; I am
> > programmatically building examples, and launching the runner with a
> custom
> > formatter. Here are the code snippets from my app:
> >
> > Launching the runner:
> >
> >                 example_groups > >
test_expectation.example_groups_for(system_state)
> >
> >                 @output = StringIO.new
> >                 options =
Spec::Runner::OptionParser.parse(["--format",
> > "RAutotest::Runner::Formatter"], @output, @output)
> >                 example_groups.each {|example_group|
> > options.add_example_group(example_group) }
> >
> >                 Spec::Runner::CommandLine.run(options)
> >
> > Building the example groups:
> >
> >                     examples > >
Class.new(Spec::Example::ExampleGroup).describe("Statistics")
> >                     @expectations.map do |expectation|
> >                         examples.it examples.description do
> >                             actual_stats_counters.should expectation
> >                         end
> >                     end
> >                     examples
> >
> > This is working fine, except for one problem. When I am writing
examples
> for
> > my app (also using rspec), the examples that are generated within my
> > application (the inner examples, so to say) are being added to the
> > application''s examples (the outer examples).
> > This means that if inner expected failures are causing my outer
examples
> to
> > fail.
> >
> > How is it possible for me to verify expected failures without causing
my
> > examples to fail?
>
> If I understand your question correctly, you can do this:
>
> lambda {
>  # stuff that should fail
> }.should raise_error(Spec::Expectations::ExpectationNotMetError)
>
> See
> http://rspec.rubyforge.org/rspec/1.1.8/classes/Spec/Matchers.html#M000434
> for more info.
>
> Cheers,
> David
>
> >
> > Thanks in advance,
> > Jake
> >
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
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Zach Dennis

2008-Oct-19 01:24 UTC

head link

[rspec-users] Problems when programmatically defining examples

On Sat, Oct 18, 2008 at 6:34 PM, Jake Benilov <benilov at gmail.com>
wrote:> David,
>
> Thanks for your reply; however I probably wasn''t very clear in my
> explanation. What I am really trying to do is to create a builder for
> example group objects, without automatically adding the example groups to
> the rspec runner when the builder code is invoked.
>
> As an example, when I call the following code:
>
> describe "a group" do
>     examples =
Class.new(Spec::Example::ExampleGroup).describe("example")
>     examples.it "should not be added to the outer group" do
>         true.should be_false
>     end
> end
When you create a subclass of Spec:Example::ExampleGroup, it
automatically gets registered. You want to make sure you unregister it
so rspec''s Runner doesn''t try to run it. Try this:

describe "a group" do
    example_group = Class.new(Spec::Example::ExampleGroup)
    example_group.unregister
    examples = example_group.describe("example")
    examples.it "should not be added to the outer group" do
        true.should be_false
    end
end


>
> I get:
> ~~~
> 1)
> ''example should not be added to the outer group'' FAILED
> expected false, got true
>
> Finished in 0.027012 seconds
>
> 1 example, 1 failure
> ~~~
> This is probably expected, but what I really want is that the
"examples"
> example group is NOT picked up by rspec. I suppose that I need to stay away
> from the "it" and "describe" methods... right?
>
> Regards,
> Jake
>
> On Sat, Oct 18, 2008 at 6:50 PM, David Chelimsky <dchelimsky at
gmail.com>
> wrote:
>>
>> On Sat, Oct 18, 2008 at 2:13 PM, Jake Benilov <benilov at
gmail.com> wrote:
>> > Hi,
>> >
>> > I am trying to code an application that is based on Rspec; I am
>> > programmatically building examples, and launching the runner with
a
>> > custom
>> > formatter. Here are the code snippets from my app:
>> >
>> > Launching the runner:
>> >
>> >                 example_groups >> >
test_expectation.example_groups_for(system_state)
>> >
>> >                 @output = StringIO.new
>> >                 options =
Spec::Runner::OptionParser.parse(["--format",
>> > "RAutotest::Runner::Formatter"], @output, @output)
>> >                 example_groups.each {|example_group|
>> > options.add_example_group(example_group) }
>> >
>> >                 Spec::Runner::CommandLine.run(options)
>> >
>> > Building the example groups:
>> >
>> >                     examples >> >
Class.new(Spec::Example::ExampleGroup).describe("Statistics")
>> >                     @expectations.map do |expectation|
>> >                         examples.it examples.description do
>> >                             actual_stats_counters.should
expectation
>> >                         end
>> >                     end
>> >                     examples
>> >
>> > This is working fine, except for one problem. When I am writing
examples
>> > for
>> > my app (also using rspec), the examples that are generated within
my
>> > application (the inner examples, so to say) are being added to the
>> > application''s examples (the outer examples).
>> > This means that if inner expected failures are causing my outer
examples
>> > to
>> > fail.
>> >
>> > How is it possible for me to verify expected failures without
causing my
>> > examples to fail?
>>
>> If I understand your question correctly, you can do this:
>>
>> lambda {
>>  # stuff that should fail
>> }.should raise_error(Spec::Expectations::ExpectationNotMetError)
>>
>> See
>>
http://rspec.rubyforge.org/rspec/1.1.8/classes/Spec/Matchers.html#M000434
>> for more info.
>>
>> Cheers,
>> David
>>
>> >
>> > Thanks in advance,
>> > Jake
>> >
>> > _______________________________________________
>> > rspec-users mailing list
>> > rspec-users at rubyforge.org
>> > http://rubyforge.org/mailman/listinfo/rspec-users
>> >
>> _______________________________________________
>> rspec-users mailing list
>> rspec-users at rubyforge.org
>> http://rubyforge.org/mailman/listinfo/rspec-users
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>


-- 
Zach Dennis
http://www.continuousthinking.com
http://www.mutuallyhuman.com

Jake Benilov

2008-Oct-19 17:40 UTC

head link

[rspec-users] Problems when programmatically defining examples

Hi Zach,

That worked a treat. Thanks!

Regards,
Jake

On Sun, Oct 19, 2008 at 3:24 AM, Zach Dennis <zach.dennis at gmail.com>
wrote:
> On Sat, Oct 18, 2008 at 6:34 PM, Jake Benilov <benilov at gmail.com>
wrote:
> > David,
> >
> > Thanks for your reply; however I probably wasn''t very clear
in my
> > explanation. What I am really trying to do is to create a builder for
> > example group objects, without automatically adding the example groups
to
> > the rspec runner when the builder code is invoked.
> >
> > As an example, when I call the following code:
> >
> > describe "a group" do
> >     examples =
Class.new(Spec::Example::ExampleGroup).describe("example")
> >     examples.it "should not be added to the outer group" do
> >         true.should be_false
> >     end
> > end
>
> When you create a subclass of Spec:Example::ExampleGroup, it
> automatically gets registered. You want to make sure you unregister it
> so rspec''s Runner doesn''t try to run it. Try this:
>
> describe "a group" do
>    example_group = Class.new(Spec::Example::ExampleGroup)
>    example_group.unregister
>    examples = example_group.describe("example")
>     examples.it "should not be added to the outer group" do
>        true.should be_false
>    end
> end
>
>
>
> >
> > I get:
> > ~~~
> > 1)
> > ''example should not be added to the outer group''
FAILED
> > expected false, got true
> >
> > Finished in 0.027012 seconds
> >
> > 1 example, 1 failure
> > ~~~
> > This is probably expected, but what I really want is that the
"examples"
> > example group is NOT picked up by rspec. I suppose that I need to stay
> away
> > from the "it" and "describe" methods... right?
> >
> > Regards,
> > Jake
> >
> > On Sat, Oct 18, 2008 at 6:50 PM, David Chelimsky <dchelimsky at
gmail.com>
> > wrote:
> >>
> >> On Sat, Oct 18, 2008 at 2:13 PM, Jake Benilov <benilov at
gmail.com>
> wrote:
> >> > Hi,
> >> >
> >> > I am trying to code an application that is based on Rspec; I
am
> >> > programmatically building examples, and launching the runner
with a
> >> > custom
> >> > formatter. Here are the code snippets from my app:
> >> >
> >> > Launching the runner:
> >> >
> >> >                 example_groups > >> >
test_expectation.example_groups_for(system_state)
> >> >
> >> >                 @output = StringIO.new
> >> >                 options >
Spec::Runner::OptionParser.parse(["--format",
> >> > "RAutotest::Runner::Formatter"], @output, @output)
> >> >                 example_groups.each {|example_group|
> >> > options.add_example_group(example_group) }
> >> >
> >> >                 Spec::Runner::CommandLine.run(options)
> >> >
> >> > Building the example groups:
> >> >
> >> >                     examples > >> >
Class.new(Spec::Example::ExampleGroup).describe("Statistics")
> >> >                     @expectations.map do |expectation|
> >> >                         examples.it examples.description do
> >> >                             actual_stats_counters.should
expectation
> >> >                         end
> >> >                     end
> >> >                     examples
> >> >
> >> > This is working fine, except for one problem. When I am
writing
> examples
> >> > for
> >> > my app (also using rspec), the examples that are generated
within my
> >> > application (the inner examples, so to say) are being added
to the
> >> > application''s examples (the outer examples).
> >> > This means that if inner expected failures are causing my
outer
> examples
> >> > to
> >> > fail.
> >> >
> >> > How is it possible for me to verify expected failures without
causing
> my
> >> > examples to fail?
> >>
> >> If I understand your question correctly, you can do this:
> >>
> >> lambda {
> >>  # stuff that should fail
> >> }.should raise_error(Spec::Expectations::ExpectationNotMetError)
> >>
> >> See
> >>
> http://rspec.rubyforge.org/rspec/1.1.8/classes/Spec/Matchers.html#M000434
> >> for more info.
> >>
> >> Cheers,
> >> David
> >>
> >> >
> >> > Thanks in advance,
> >> > Jake
> >> >
> >> > _______________________________________________
> >> > rspec-users mailing list
> >> > rspec-users at rubyforge.org
> >> > http://rubyforge.org/mailman/listinfo/rspec-users
> >> >
> >> _______________________________________________
> >> rspec-users mailing list
> >> rspec-users at rubyforge.org
> >> http://rubyforge.org/mailman/listinfo/rspec-users
> >
> >
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
>
>
>
> --
> Zach Dennis
> http://www.continuousthinking.com
> http://www.mutuallyhuman.com
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
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