path: root/activerecord/test/cases/connection_adapters/schema_cache_test.rb

require "cases/helper"

module ActiveRecord
  module ConnectionAdapters
    class SchemaCacheTest < ActiveRecord::TestCase
      def setup
        connection = ActiveRecord::Base.connection
        @cache     = SchemaCache.new connection
      end

      def test_primary_key
        assert_equal "id", @cache.primary_keys("posts")
      end

      def test_primary_key_for_non_existent_table
        assert_nil @cache.primary_keys("omgponies")
      end

      def test_caches_columns
        columns = @cache.columns("posts")
        assert_equal columns, @cache.columns("posts")
      end

      def test_caches_columns_hash
        columns_hash = @cache.columns_hash("posts")
        assert_equal columns_hash, @cache.columns_hash("posts")
      end

      def test_clearing
        @cache.columns("posts")
        @cache.columns_hash("posts")
        @cache.data_sources("posts")
        @cache.primary_keys("posts")

        @cache.clear!

        assert_equal 0, @cache.size
      end

      def test_dump_and_load
        @cache.columns("posts")
        @cache.columns_hash("posts")
        @cache.data_sources("posts")
        @cache.primary_keys("posts")

        @cache = Marshal.load(Marshal.dump(@cache))

        assert_equal 11, @cache.columns("posts").size
        assert_equal 11, @cache.columns_hash("posts").size
        assert @cache.data_sources("posts")
        assert_equal "id", @cache.primary_keys("posts")
      end

      def test_table_methods_deprecation
        assert_deprecated { assert @cache.table_exists?("posts") }
        assert_deprecated { assert @cache.tables("posts") }
        assert_deprecated { @cache.clear_table_cache!("posts") }
      end
    end
  end
end