rails/rails#11573

gistfile1.txt

$ ruby -Itest test/generators/scaffold_generator_test.rb
Run options: --seed 61346

# Running:

.F............

Finished in 1.572028s, 8.9057 runs/s, 152.6690 assertions/s.

  1) Failure:
ScaffoldGeneratorTest#test_scaffold_generator_belongs_to [test/generators/scaffold_generator_test.rb:307]:
Expected /<%= f\.text_field :currency_id %>/ to match "<%= form_for(@account) do |f| %>\n  <% if @account.errors.any? %>\n    <div id=\"error_explanation\">\n      <h2><%= pluralize(@account.errors.count, \"error\") %> prohibited this account from being saved:</h2>\n\n      <ul>\n      <% @account.errors.full_messages.each do |msg| %>\n        <li><%= msg %></li>\n      <% end %>\n      </ul>\n    </div>\n  <% end %>\n\n  <div class=\"field\">\n    <%= f.label :name %><br>\n    <%= f.text_field :name %>\n  </div>\n  <div class=\"field\">\n    <%= f.label :currency %><br>\n    <%= f.text_field :currency %>\n  </div>\n  <div class=\"actions\">\n    <%= f.submit %>\n  </div>\n<% end %>\n".

14 runs, 240 assertions, 1 failures, 0 errors, 0 skips

scaffold_generator_test.diff

diff --git a/railties/test/generators/scaffold_generator_test.rb b/railties/test/generators/scaffold_generator_test.rb
index d5ad978..cbc5a95 100644
--- a/railties/test/generators/scaffold_generator_test.rb
+++ b/railties/test/generators/scaffold_generator_test.rb
@@ -286,6 +286,31 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
     end
   end

+  def test_scaffold_generator_belongs_to
+    run_generator ["account", "name", "currency:belongs_to"]
+
+    assert_file "app/models/account.rb", /belongs_to :currency/
+
+    assert_migration "db/migrate/create_accounts.rb" do |m|
+      assert_method :change, m do |up|
+        assert_match(/t\.string :name/, up)
+        assert_match(/t\.belongs_to :currency/, up)
+      end
+    end
+
+    assert_file "app/controllers/accounts_controller.rb" do |content|
+      assert_instance_method :account_params, content do |m|
+        assert_match(/permit\(:name, :currency_id\)/, m)
+      end
+    end
+
+    assert_file "app/views/accounts/_form.html.erb" do |content|
+      assert_match(/<%= f\.text_field :name %>/, content)
+      assert_match(/<%= f\.text_field :currency_id %>/, content)
+    end
+
+  end
+
   def test_scaffold_generator_password_digest
     run_generator ["user", "name", "password:digest"]

scaffold_generator_test.rb

  def test_scaffold_generator_belongs_to
    run_generator ["account", "name", "currency:belongs_to"]

    assert_file "app/models/account.rb", /belongs_to :currency/

    assert_migration "db/migrate/create_accounts.rb" do |m|
      assert_method :change, m do |up|
        assert_match(/t\.string :name/, up)
        assert_match(/t\.belongs_to :currency/, up)
      end
    end

    assert_file "app/controllers/accounts_controller.rb" do |content|
      assert_instance_method :account_params, content do |m|
        assert_match(/permit\(:name, :currency_id\)/, m)
      end
    end

    assert_file "app/views/accounts/_form.html.erb" do |content|
      assert_match(/<%= f\.text_field :name %>/, content)
      assert_match(/<%= f\.text_field :currency_id %>/, content)
    end

  end