ruby on rails - How to test incrementing numerical id in rspec -

i have checkbox form partial select all, or 1 class:

<p>   <%= check_box_tag(:all) %>   <%= label_tag(:all, "all subjects") %> </p> <p>   <% @subjects.each |subject| %>     <%= check_box_tag(subject.id) %>     <%= label_tag(subject.id, subject.name) %>   <br />   <% end %> </p> 

which generates following html:

<p>   <input id="all" name="all" type="checkbox" value="1" />   <label for="all">all subjects</label> </p> <p>       <input id="1" name="1" type="checkbox" value="1" />       <label for="1">english</label>     <br />       <input id="2" name="2" type="checkbox" value="1" />       <label for="2">basket_weaving</label>     <br />       <input id="3" name="3" type="checkbox" value="1" />       <label for="3">math</label>     <br /> </p> 

i want test each subject being displayed in view using rspec -

it "should have box each subject"   @eval_selektor   @student_group.subjects.each |subject|     response.should ??????   end end 

i've tried response.should have_selector('id' content: subject.id) throwsundefined method include?' 1:fixnum (besides not making sense), i've tried xpath/css demonstrated here.

have try:

find("input[id='#{subject.id}']")