Hi,
I am trying to write and test a helper that accepts a block. Right now it
goes something like this:
module ContactHelper
# Wraps a field with div.error if it has an error.
def wrap_error_field errors, &block
field = capture &block
if errors.empty?
concat field
else
concat content_tag(:div, field, :class => 'error')
end
end # field_error_helper
This is my first time writing a helper, so please tell me if I'm wrong.
Then, I tried to test it, but couldn't figure it out, since it seems the
method won't actually return anything due to the use of concat. The best I
could figure out for now was to use eval_erb.
require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')
describe ContactHelper do
describe "field_error_helper" do
context "when there is an error" do
it "should wrap the block in div.error" do
assigns[:errors] = [
'Error'
]
output = eval_erb <<-ERB
<% wrap_error_field @errors do %>
<p>Block</p>
<% end %>
ERB
assert_xhtml output do
div.error do
p 'Block'
end
end
end # it should wrap the block in div.error
end # when there is an error
end # describe field_error_helper
end
end
Is that the best/only method? I'm not sure how much I really like it.
Further, when I run the tests, it always outputs "Block" before the test is
executed, and I can't figure out why, and that's slightly annoying.
Thanks,
Brandon
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