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comp.lang.ruby

possible to un-warn?

David Chelimsky

1/14/2007 4:07:00 PM

Hi all,

I'm working on implementing expectation matchers in rspec, so instead of this:

cat.should_eat "tuna"

you would write this:

cat.should eat "tuna"

Now the rub is that this generates "warning: parenthesize argument(s)
for future version". The thing is that, in this case, we know with
some certainty that everything after "eat" is an argument to "eat",
and that the result of "eat" is an argument to "should".

I'd like the ability to be able to tell the interpreter that this is
intentional and to not warn in this case, and I don't want to
accomplish this by turning off all warnings. Is this doable? Does this
strike anybody as nuts? If so, please explain.

The reason I want to do this is that I've run this new syntax by a few
people. Those who write a lot of ruby (not necessarily rails) are
perfectly happy writing it like this:

cat.should eat("tuna") #produces no warning

But, those who write a lot of ruby on rails, not so much. The parens
are not railsy.

In the end, using matchers is a much more flexible and maintainable
approach to expectations, so it's likely that it will become "the
way". The question is whether we can keep all the rails developers who
are already using rspec happy without having to maintain two methods
to achieve the same goal.

Thanks,
David
7 Answers

Wilson Bilkovich

1/14/2007 5:35:00 PM

0

On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> Hi all,
>
> I'm working on implementing expectation matchers in rspec, so instead of this:
>
> cat.should_eat "tuna"
>
> you would write this:
>
> cat.should eat "tuna"
>
> Now the rub is that this generates "warning: parenthesize argument(s)
> for future version". The thing is that, in this case, we know with
> some certainty that everything after "eat" is an argument to "eat",
> and that the result of "eat" is an argument to "should".
>
> I'd like the ability to be able to tell the interpreter that this is
> intentional and to not warn in this case, and I don't want to
> accomplish this by turning off all warnings. Is this doable? Does this
> strike anybody as nuts? If so, please explain.
>
> The reason I want to do this is that I've run this new syntax by a few
> people. Those who write a lot of ruby (not necessarily rails) are
> perfectly happy writing it like this:
>
> cat.should eat("tuna") #produces no warning
>
> But, those who write a lot of ruby on rails, not so much. The parens
> are not railsy.
>
> In the end, using matchers is a much more flexible and maintainable
> approach to expectations, so it's likely that it will become "the
> way". The question is whether we can keep all the rails developers who
> are already using rspec happy without having to maintain two methods
> to achieve the same goal.
>

Unfortunately this happens in parse.y, without any conditional code
around it. To my knowledge, there is no way to disable the warning
without recompiling Ruby.

David Chelimsky

1/14/2007 6:07:00 PM

0

On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > Hi all,
> >
> > I'm working on implementing expectation matchers in rspec, so instead of this:
> >
> > cat.should_eat "tuna"
> >
> > you would write this:
> >
> > cat.should eat "tuna"
> >
> > Now the rub is that this generates "warning: parenthesize argument(s)
> > for future version". The thing is that, in this case, we know with
> > some certainty that everything after "eat" is an argument to "eat",
> > and that the result of "eat" is an argument to "should".
> >
> > I'd like the ability to be able to tell the interpreter that this is
> > intentional and to not warn in this case, and I don't want to
> > accomplish this by turning off all warnings. Is this doable? Does this
> > strike anybody as nuts? If so, please explain.
> >
> > The reason I want to do this is that I've run this new syntax by a few
> > people. Those who write a lot of ruby (not necessarily rails) are
> > perfectly happy writing it like this:
> >
> > cat.should eat("tuna") #produces no warning
> >
> > But, those who write a lot of ruby on rails, not so much. The parens
> > are not railsy.
> >
> > In the end, using matchers is a much more flexible and maintainable
> > approach to expectations, so it's likely that it will become "the
> > way". The question is whether we can keep all the rails developers who
> > are already using rspec happy without having to maintain two methods
> > to achieve the same goal.
> >
>
> Unfortunately this happens in parse.y, without any conditional code
> around it. To my knowledge, there is no way to disable the warning
> without recompiling Ruby.

Bummer. Well, you're a rails developer - how much would this syntax
bug you (in this case a new assert_select wrapper)?

response.should have_tag("html:root>head>title", "Login")



>
>

Wilson Bilkovich

1/14/2007 7:08:00 PM

0

On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> > On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > > Hi all,
> > >
> > > I'm working on implementing expectation matchers in rspec, so instead of this:
> > >
> > > cat.should_eat "tuna"
> > >
> > > you would write this:
> > >
> > > cat.should eat "tuna"
> > >
> > > Now the rub is that this generates "warning: parenthesize argument(s)
> > > for future version". The thing is that, in this case, we know with
> > > some certainty that everything after "eat" is an argument to "eat",
> > > and that the result of "eat" is an argument to "should".
> > >
> > > I'd like the ability to be able to tell the interpreter that this is
> > > intentional and to not warn in this case, and I don't want to
> > > accomplish this by turning off all warnings. Is this doable? Does this
> > > strike anybody as nuts? If so, please explain.
> > >
> > > The reason I want to do this is that I've run this new syntax by a few
> > > people. Those who write a lot of ruby (not necessarily rails) are
> > > perfectly happy writing it like this:
> > >
> > > cat.should eat("tuna") #produces no warning
> > >
> > > But, those who write a lot of ruby on rails, not so much. The parens
> > > are not railsy.
> > >
> > > In the end, using matchers is a much more flexible and maintainable
> > > approach to expectations, so it's likely that it will become "the
> > > way". The question is whether we can keep all the rails developers who
> > > are already using rspec happy without having to maintain two methods
> > > to achieve the same goal.
> > >
> >
> > Unfortunately this happens in parse.y, without any conditional code
> > around it. To my knowledge, there is no way to disable the warning
> > without recompiling Ruby.
>
> Bummer. Well, you're a rails developer - how much would this syntax
> bug you (in this case a new assert_select wrapper)?
>
> response.should have_tag("html:root>head>title", "Login")
>

That looks totally fine. "Even" as a Rails developer, I use parens
like that to disambiguate things, visually.

Anyone who can't handle some parentheses occasionally shouldn't be a
developer. Heh.

That being said.. why wouldn't that just be: should_have_tag ?
I haven't seen anything about this change on the mailing list.

--Wilson.

David Chelimsky

1/14/2007 9:40:00 PM

0

On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> > > On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > > > Hi all,
> > > >
> > > > I'm working on implementing expectation matchers in rspec, so instead of this:
> > > >
> > > > cat.should_eat "tuna"
> > > >
> > > > you would write this:
> > > >
> > > > cat.should eat "tuna"
> > > >
> > > > Now the rub is that this generates "warning: parenthesize argument(s)
> > > > for future version". The thing is that, in this case, we know with
> > > > some certainty that everything after "eat" is an argument to "eat",
> > > > and that the result of "eat" is an argument to "should".
> > > >
> > > > I'd like the ability to be able to tell the interpreter that this is
> > > > intentional and to not warn in this case, and I don't want to
> > > > accomplish this by turning off all warnings. Is this doable? Does this
> > > > strike anybody as nuts? If so, please explain.
> > > >
> > > > The reason I want to do this is that I've run this new syntax by a few
> > > > people. Those who write a lot of ruby (not necessarily rails) are
> > > > perfectly happy writing it like this:
> > > >
> > > > cat.should eat("tuna") #produces no warning
> > > >
> > > > But, those who write a lot of ruby on rails, not so much. The parens
> > > > are not railsy.
> > > >
> > > > In the end, using matchers is a much more flexible and maintainable
> > > > approach to expectations, so it's likely that it will become "the
> > > > way". The question is whether we can keep all the rails developers who
> > > > are already using rspec happy without having to maintain two methods
> > > > to achieve the same goal.
> > > >
> > >
> > > Unfortunately this happens in parse.y, without any conditional code
> > > around it. To my knowledge, there is no way to disable the warning
> > > without recompiling Ruby.
> >
> > Bummer. Well, you're a rails developer - how much would this syntax
> > bug you (in this case a new assert_select wrapper)?
> >
> > response.should have_tag("html:root>head>title", "Login")
> >
>
> That looks totally fine. "Even" as a Rails developer, I use parens
> like that to disambiguate things, visually.
>
> Anyone who can't handle some parentheses occasionally shouldn't be a
> developer. Heh.
>
> That being said.. why wouldn't that just be: should_have_tag ?
> I haven't seen anything about this change on the mailing list.
>
> --Wilson.

Remember the whole sugar causes cancer thing? I've added suppport for
expectation matchers in part to solve that problem. You can read about
it here:

http://blog.davidchelimsky.net/articles/2007/01/10/rspec-should-use_a_little_...

Cheers,
David


>
>

Wilson Bilkovich

1/14/2007 10:20:00 PM

0

On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> > On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > > On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> > > > On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > > > > Hi all,
> > > > >
> > > > > I'm working on implementing expectation matchers in rspec, so instead of this:
> > > > >
> > > > > cat.should_eat "tuna"
> > > > >
> > > > > you would write this:
> > > > >
> > > > > cat.should eat "tuna"
> > > > >
> > > > > Now the rub is that this generates "warning: parenthesize argument(s)
> > > > > for future version". The thing is that, in this case, we know with
> > > > > some certainty that everything after "eat" is an argument to "eat",
> > > > > and that the result of "eat" is an argument to "should".
> > > > >
> > > > > I'd like the ability to be able to tell the interpreter that this is
> > > > > intentional and to not warn in this case, and I don't want to
> > > > > accomplish this by turning off all warnings. Is this doable? Does this
> > > > > strike anybody as nuts? If so, please explain.
> > > > >
> > > > > The reason I want to do this is that I've run this new syntax by a few
> > > > > people. Those who write a lot of ruby (not necessarily rails) are
> > > > > perfectly happy writing it like this:
> > > > >
> > > > > cat.should eat("tuna") #produces no warning
> > > > >
> > > > > But, those who write a lot of ruby on rails, not so much. The parens
> > > > > are not railsy.
> > > > >
> > > > > In the end, using matchers is a much more flexible and maintainable
> > > > > approach to expectations, so it's likely that it will become "the
> > > > > way". The question is whether we can keep all the rails developers who
> > > > > are already using rspec happy without having to maintain two methods
> > > > > to achieve the same goal.
> > > > >
> > > >
> > > > Unfortunately this happens in parse.y, without any conditional code
> > > > around it. To my knowledge, there is no way to disable the warning
> > > > without recompiling Ruby.
> > >
> > > Bummer. Well, you're a rails developer - how much would this syntax
> > > bug you (in this case a new assert_select wrapper)?
> > >
> > > response.should have_tag("html:root>head>title", "Login")
> > >
> >
> > That looks totally fine. "Even" as a Rails developer, I use parens
> > like that to disambiguate things, visually.
> >
> > Anyone who can't handle some parentheses occasionally shouldn't be a
> > developer. Heh.
> >
> > That being said.. why wouldn't that just be: should_have_tag ?
> > I haven't seen anything about this change on the mailing list.
> >
> > --Wilson.
>
> Remember the whole sugar causes cancer thing? I've added suppport for
> expectation matchers in part to solve that problem. You can read about
> it here:
>
> http://blog.davidchelimsky.net/articles/2007/01/10/rspec-should-use_a_little_...
>

Is now the appropriate time for me to re-suggest:
@hotel.should.be_booked_solid_on "12/31/2007"

David Chelimsky

1/15/2007 12:46:00 PM

0

On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> > > On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > > > On 1/14/07, Wilson Bilkovich <wilsonb@gmail.com> wrote:
> > > > > On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> > > > > > Hi all,
> > > > > >
> > > > > > I'm working on implementing expectation matchers in rspec, so instead of this:
> > > > > >
> > > > > > cat.should_eat "tuna"
> > > > > >
> > > > > > you would write this:
> > > > > >
> > > > > > cat.should eat "tuna"
> > > > > >
> > > > > > Now the rub is that this generates "warning: parenthesize argument(s)
> > > > > > for future version". The thing is that, in this case, we know with
> > > > > > some certainty that everything after "eat" is an argument to "eat",
> > > > > > and that the result of "eat" is an argument to "should".
> > > > > >
> > > > > > I'd like the ability to be able to tell the interpreter that this is
> > > > > > intentional and to not warn in this case, and I don't want to
> > > > > > accomplish this by turning off all warnings. Is this doable? Does this
> > > > > > strike anybody as nuts? If so, please explain.
> > > > > >
> > > > > > The reason I want to do this is that I've run this new syntax by a few
> > > > > > people. Those who write a lot of ruby (not necessarily rails) are
> > > > > > perfectly happy writing it like this:
> > > > > >
> > > > > > cat.should eat("tuna") #produces no warning
> > > > > >
> > > > > > But, those who write a lot of ruby on rails, not so much. The parens
> > > > > > are not railsy.
> > > > > >
> > > > > > In the end, using matchers is a much more flexible and maintainable
> > > > > > approach to expectations, so it's likely that it will become "the
> > > > > > way". The question is whether we can keep all the rails developers who
> > > > > > are already using rspec happy without having to maintain two methods
> > > > > > to achieve the same goal.
> > > > > >
> > > > >
> > > > > Unfortunately this happens in parse.y, without any conditional code
> > > > > around it. To my knowledge, there is no way to disable the warning
> > > > > without recompiling Ruby.
> > > >
> > > > Bummer. Well, you're a rails developer - how much would this syntax
> > > > bug you (in this case a new assert_select wrapper)?
> > > >
> > > > response.should have_tag("html:root>head>title", "Login")
> > > >
> > >
> > > That looks totally fine. "Even" as a Rails developer, I use parens
> > > like that to disambiguate things, visually.
> > >
> > > Anyone who can't handle some parentheses occasionally shouldn't be a
> > > developer. Heh.
> > >
> > > That being said.. why wouldn't that just be: should_have_tag ?
> > > I haven't seen anything about this change on the mailing list.
> > >
> > > --Wilson.
> >
> > Remember the whole sugar causes cancer thing? I've added suppport for
> > expectation matchers in part to solve that problem. You can read about
> > it here:
> >
> > http://blog.davidchelimsky.net/articles/2007/01/10/rspec-should-use_a_little_...
> >
>
> Is now the appropriate time for me to re-suggest:
> @hotel.should.be_booked_solid_on "12/31/2007"

YES!!!!!!!!!!!

Inspired by your question, I played around for a minute w/ a means of
supporting all three sets of syntax w/ one set of matchers. The result
is not complete yet, but right now the trunk supports all of these
forms for some of the expections:

result.should_equal 5
result.should.equal 5
result.should equal(5)

When I'm done, you'll be able to use most of the expectations with any
of the three forms, though using the "_" or "." forms for custom
expectations will require monkey patching an RSpec class, so it will
be an "at your own risk" sort of scenario.

Thanks for bringing this up Wilson!

Cheers,
David

>
>

David Chelimsky

1/16/2007 3:00:00 PM

0

On 1/15/07, Mark Van Holstyn <mvette13@gmail.com> wrote:
> On 1/14/07, David Chelimsky <dchelimsky@gmail.com> wrote:
> >
> > response.should have_tag("html:root>head>title", "Login")
>
>
> What about doing something like:
>
> respoonse.should :have_tag, "html:root>head>title", "Login"
>
> Then should can just call have_tag with all the given arguments?

That idea came up a long time ago on the rspec list and got a pretty
quick thumbs down. It does seem to simplify things from a maintenance
perspective, but no more so than this:

response.should.have_tag "html:root>head>title", "Login"

Anyhow - I think that we should probably move this discussion over the
rspec-users list:

http://rubyforge.org/mailman/listinfo/r...

Cheers,
David


>
>
>
>
> --
> Mark Van Holstyn
> mvanholstyn@gmail.com
> http://lotswho...
>
>