```ruby
require "spec_helper"

describe ActiveRecord::Turntable::ActiveRecordExt::SchemaDumper do
  before(:all) do
    reload_turntable!(File.join(File.dirname(__FILE__), "../../../config/turntable.yml"))
    ActiveRecord::SchemaDumper.prepend(ActiveRecord::Turntable::ActiveRecordExt::SchemaDumper)
  end

  before(:each) do
    establish_connection_to(:test)
  end

  def dump_schema
    stream = StringIO.new
    ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, stream)
    stream.string
  end

  context "#dump" do
    subject { dump_schema }
    it { is_expected.to match(/create_table "users", force: :cascade, options: ".*?"\sdo\s\|t\|$/) }
    it { is_expected.to match(/create_sequence_for "users", force: :cascade, options: /) }
    it { is_expected.not_to match(/create_table "users_id_seq"/) }
    it { is_expected.not_to match(/create_sequence_for "users_id_seq".*?do/) }
  end
end
```

Remove schema dumper testing because it is tested on activerecord unit tests
user
```ruby
require "spec_helper"

describe ActiveRecord::Turntable::ActiveRecordExt::SchemaDumper do
  before(:all) do
    reload_turntable!(File.join(File.dirname(__FILE__), "../../../config/turntable.yml"))
    ActiveRecord::SchemaDumper.prepend(ActiveRecord::Turntable::ActiveRecordExt::SchemaDumper)
  end

  before(:each) do
    establish_connection_to(:test)
  end

  def dump_schema
    stream = StringIO.new
    ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, stream)
    stream.string
  end

  context "#dump" do
    subject { dump_schema }
    it { is_expected.to match(/create_sequence_for "users", force: :cascade, options: /) }
    it { is_expected.not_to match(/create_table "users_id_seq"/) }
    it { is_expected.not_to match(/create_sequence_for "users_id_seq".*?do/) }
  end
end
```
assistant