So, after reading all of those fantastic emails discussing testing
behaviour vs state, I decided to try mocking and stubbing a couple of
methods. I think I did well on my first one, but I'm not sure what the
best way to spec the following method is:
1 class RentalMap
...
166 def add_properties
167 Property.find(:all, :conditions => 'latitude NOT NULL AND
longitude NOT NULL').each do |p|
168 add_marker p.address, p.latitude, p.longitude,
generate_marker_contents(p)
169 end
170 end
In my spec, I figured I would:
-Create a RentalMap object.
-Mock two properties.
-Setup expectations on the two mock properties.
-Stub the call to Property#find .
-Stub the call to RentalMap#add_marker .
-Stub the call to RentalMap#generate_marker_contents .
Here's what I wrote:
185 describe '#add_properties' do
186 it 'should add properties to the map' do
187 map = RentalMap.new @map_name, @latitude,
@longitude
188 mock_property1 = mock 'property'
189 mock_property2 = mock 'property'
190
191 Property.stub!(:find).and_return mock_property1,
mock_property2
192 map.stub!(:add_marker).and_return '?'
193
194 mock_property1.should_receive(:address ).and_return '400
Bloor Street'
195 mock_property1.should_receive(:latitude ).and_return 12.34
196 mock_property1.should_receive(:longitude).and_return 56.78
197 mock_property2.should_receive(:address ).and_return '500
Bloor Street'
198 mock_property2.should_receive(:latitude ).and_return 12.45
199 mock_property2.should_receive(:longitude).and_return 56.89
200 map.stub!(:generate_marker_contents).twice.and_return 'Some
contents for the first property', 'Some contents for the second
property'
201
202 map.should_receive(:add_marker).with mock_property1.address,
mock_property1.latitude, mock_property1.longitude,
map.generate_marker_contents
203 map.should_receive(:add_marker).with mock_property2.address,
mock_property2.latitude, mock_property2.longitude,
map.generate_marker_contents
204
205 map.add_properties
206 end
207 end
However, this fails with:
Spec::Mocks::MockExpectationError in 'RentalMap#add_properties should
add properties to the map'
Mock 'property' received unexpected message :each with (no args)
/Users/nick/src/myapp.podoboo.com/app/models/rental_map.rb:167:in
`add_properties'
./spec/models/rental_map_spec.rb:205:
I don't think that I should be stubbing Array#each , but I'm not sure
what I should change. Any suggestions?
Thanks!
Nick
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