Hi all,
I'm new to this list and new to RSpec so I have been trying out RSpec the
last couple of days and I find it very a natural way of testing. So first of
all thanks for providing this framework.
Now, I have written some tests for my controllers and models and I saw
myself writing similar code, so I began refactoring and came up with the
following issue.
Here is a simple example of what I first wrote:
describe Example do
it "should not be valid without attribute1" do
Example.new(:attribute2 => "2").should_not be_valid
end
it "should not be valid without attribute2" do
Example.new(:attribute1 => "1").should_not be_valid
end
end
Which I rewrote into another working test:
######
module ExampleSpecHelper
def required_valid_attributes
{:attribute1 => "1", :attribute2 => "2"}
end
end
describe Example do
include ExampleSpecHelper
[:attribute1, :attribute2].each do |attribute|
before(:all) do
@model_with_one_missing_attribute =
TextMessage.new(required_valid_attributes.except(attribute))
end
it "should not be valid without #{attribute}" do
@model_with_one_missing_attribute.should_not be_valid
end
end
#####
In this example in you might not see difference in lines of code, but
imagine you would have 10 attributes and 10 more tests for each attribute..
Now I rewrote this I was still not satisfied because I thought I would like
to use this same approach for several models with different attributes
while keeping the logic of this test in one place. Unfortunately, I didn't
come that far because of this:
#this works:
describe Example do
include ExampleSpecHelper
required_attributes = [:attribute1, :attribute2]
required_attributes.each do |attribute|
before(:all) do
@model_with_one_missing_attribute =
TextMessage.new(required_valid_attributes.except(attribute))
end
it "should not be valid without #{attribute}" do
@model_with_one_missing_attribute.should_not be_valid
end
end
#However this which eventually will be more DRY, but does for some reason
not work?!
module ExampleSpecHelper
...
def required_attributes
[:attribute1, :attribute2]
end
...
end
describe Example do
include ExampleSpecHelper
required_attributes.each do |attribute|
before(:all) do
@model_with_one_missing_attribute =
TextMessage.new(required_valid_attributes.except(attribute))
end
it "should not be valid without #{attribute}" do
@model_with_one_missing_attribute.should_not be_valid
end
end
############
I don't understand why it does not work. In the last example
required_attributes is nil while the other methods from the helper module
such as 'required_valid_attributes' are available on an even lower level.
Why? I hope you understand why I'm trying to refactor it like this. If I can
do this I only need to define the required attributes for each model and use
it_should_behave_like "an AR model" to keep it DRY.
Hope someone can clarify this and that I haven't done something stupid!
Thanks!
Cheers,
Jeroen
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