Add spec

spec/migrate/migrate_drop_fk_spec.rb

@@ -67,4 +67,47 @@
       expect(subject.dump.each_line.select {|i| i !~ /\A\Z/ }.join).to eq expected_dsl.strip_heredoc.strip.each_line.select {|i| i !~ /\A\Z/ }.join
     }
   end
+
+  context 'when drop fk when drop table' do
+    let(:dsl) {
+      <<-RUBY
+create_table "parent", force: true do |t|
+end
+
+create_table "child", force: true do |t|
+  t.integer "parent_id", unsigned: true
+end
+
+add_index "child", ["parent_id"], name: "par_ind", using: :btree
+
+add_foreign_key "child", "parent", name: "child_ibfk_1", dependent: :delete
+      RUBY
+    }
+
+    let(:sorted_dsl) {
+      <<-RUBY
+create_table "child", force: true do |t|
+  t.integer "parent_id", unsigned: true
+end
+
+add_index "child", ["parent_id"], name: "par_ind", using: :btree
+
+create_table "parent", force: true do |t|
+end
+
+add_foreign_key "child", "parent", name: "child_ibfk_1", dependent: :delete
+      RUBY
+    }
+
+    before { subject.diff(dsl).migrate }
+    subject { client(enable_foreigner: true) }
+
+    it {
+      delta = subject.diff('')
+      expect(delta.differ?).to be_truthy
+      expect(subject.dump).to eq sorted_dsl.strip_heredoc.strip
+      delta.migrate
+      expect(subject.dump.strip).to eq ''
+    }
+  end
 end

spec/spec_helper.rb

@@ -20,8 +20,15 @@
 
 TEST_SCHEMA = 'ridgepole_test'
 
-ActiveRecord::Migration.verbose = false
-Ridgepole::Logger.instance.level = ::Logger::ERROR
+if ENV['DEBUG']
+  ActiveRecord::Migration.verbose = true
+  logger = Ridgepole::Logger.instance
+  logger.level = ::Logger::DEBUG
+  ActiveRecord::Base.logger = logger
+else
+  ActiveRecord::Migration.verbose = false
+  Ridgepole::Logger.instance.level = ::Logger::ERROR
+end
 
 RSpec.configure do |config|
   config.before(:each) do
@@ -44,6 +51,7 @@ def client(options = {}, config = {})
 
   options = {
     :enable_mysql_unsigned => true,
+    :debug => !!ENV['DEBUG'],
   }.merge(options)
 
   Ridgepole::Client.new(config, options)