require "cases/helper"

module ActiveRecord
  module ConnectionAdapters
    class Mysql2Adapter
      class SchemaMigrationsTest < ActiveRecord::TestCase
        def test_initializes_schema_migrations_for_encoding_utf8mb4
          conn = ActiveRecord::Base.connection

          smtn = ActiveRecord::Migrator.schema_migrations_table_name
          conn.drop_table(smtn) if conn.table_exists?(smtn)

          config = conn.instance_variable_get(:@config)
          original_encoding = config[:encoding]

          config[:encoding] = 'utf8mb4'
          conn.initialize_schema_migrations_table

          assert conn.column_exists?(smtn, :version, :string, limit: Mysql2Adapter::MAX_INDEX_LENGTH_FOR_UTF8MB4)
        ensure
          config[:encoding] = original_encoding
        end
      end
    end
  end
end