On 2010-07-21 1:41 AM, Zhenning Guan wrote:
Suppose I have a model Forum, have some attributes, title, content,
tag.so I do it in Forum model.
validates_presence_of :title
validates_presence_of :tag
validates_presence_of :content.
when I added validateds_presence_of, rails will restrict the attribute
not be empty, when save record. so after that, Do I still need to test
those attributs not_valid?
like this
it 'should not be valid when title empty' do
Forum.new(empty_title_attrbiute_hash).should_not be_valid
end
it 'should not be valid when tag empty' do
Forum.new(empty_tag_attrbiute_hash).should_not be_valid
end
it 'should not be valid when content empty' do
Forum.new(empty_content_attrbiute_hash).should_not be_valid
end
Something else to keep in mind is that in the spirit of BDD, ideally you
are writing your specs before you write any of your code. So to write
examples that specify attributes cannot be nil will come before the
validates_presence_of statements in your model. Then when your tests
pass, you know you've implemented the correct functionality. This is
also a great sanity check when, later down the line, something gets
accidentally changed or deleted in the model and you have a spec to
catch it.
Peace,
Phillip
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