Agile Web Development with Rails, Edition 5

10.1 Iteration E1: Creating a Smarter Cart 9.3 Iteration D3: Adding a button

9.4 Playtime

Once again, get the tests working, and add tests for the smarter cart.

See that the tests fail.

rails test
Run options: --seed 16133
 
# Running:
 
..........................E
 
Error:
LineItemsControllerTest#test_should_create_line_item:
ActiveRecord::RecordNotFound: Couldn't find Product with 'id'=
    app/controllers/line_items_controller.rb:35:in `create'
    test/controllers/line_items_controller_test.rb:20:in `block (2 levels) in <class:LineItemsControllerTest>'
    test/controllers/line_items_controller_test.rb:19:in `block in <class:LineItemsControllerTest>'
 
bin/rails test test/controllers/line_items_controller_test.rb:18
 
.
 
Finished in 0.762856s, 36.7042 runs/s, 72.0974 assertions/s.
 
28 runs, 55 assertions, 0 failures, 1 errors, 0 skips

Update parameters passed as well as expected target of redirect

edit test/controllers/line_items_controller_test.rb
  test "should create line_item" do
    assert_difference('LineItem.count') do
      post line_items_url, params: { product_id: products(:ruby).id }
    end
 
    follow_redirect!
 
    assert_select 'h2', 'Your Pragmatic Cart'
    assert_select 'li', 'Programming Ruby 1.9'
  end

Rerun the previously failing test to verify the fix.

rails test test/controllers/line_items_controller_test.rb
Run options: --seed 11139
 
# Running:
 
.......
 
Finished in 0.558030s, 12.5441 runs/s, 17.9202 assertions/s.
 
7 runs, 10 assertions, 0 failures, 0 errors, 0 skips

10.1 Iteration E1: Creating a Smarter Cart 9.3 Iteration D3: Adding a button