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require "cases/helper"
require "models/lesson"
require "models/student"
class HabtmDestroyOrderTest < ActiveRecord::TestCase
test "may not delete a lesson with students" do
sicp = Lesson.new(:name => "SICP")
ben = Student.new(:name => "Ben Bitdiddle")
sicp.students << ben
sicp.save!
assert_raises LessonError do
assert_no_difference('Lesson.count') do
sicp.destroy
end
end
end
end
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