rails--rails/activerecord/test/cases/time_precision_test.rb

require 'cases/helper'
require 'support/schema_dumping_helper'

if ActiveRecord::Base.connection.supports_datetime_with_precision?
class TimePrecisionTest < ActiveRecord::TestCase
  include SchemaDumpingHelper
  self.use_transactional_tests = false

  class Foo < ActiveRecord::Base; end

  setup do
    @connection = ActiveRecord::Base.connection
    Foo.reset_column_information
  end

  teardown do
    @connection.drop_table :foos, if_exists: true
  end

  def test_time_data_type_with_precision
    @connection.create_table(:foos, force: true)
    @connection.add_column :foos, :start,  :time, precision: 3
    @connection.add_column :foos, :finish, :time, precision: 6
    assert_equal 3, Foo.columns_hash['start'].precision
    assert_equal 6, Foo.columns_hash['finish'].precision
  end

  def test_passing_precision_to_time_does_not_set_limit
    @connection.create_table(:foos, force: true) do |t|
      t.time :start,  precision: 3
      t.time :finish, precision: 6
    end
    assert_nil Foo.columns_hash['start'].limit
    assert_nil Foo.columns_hash['finish'].limit
  end

  def test_invalid_time_precision_raises_error
    assert_raises ActiveRecord::ActiveRecordError do
      @connection.create_table(:foos, force: true) do |t|
        t.time :start,  precision: 7
        t.time :finish, precision: 7
      end
    end
  end

  def test_formatting_time_according_to_precision
    @connection.create_table(:foos, force: true) do |t|
      t.time :start,  precision: 0
      t.time :finish, precision: 4
    end
    time = ::Time.utc(2000, 1, 1, 12, 30, 0, 999999)
    Foo.create!(start: time, finish: time)
    assert foo = Foo.find_by(start: time)
    assert_equal 1, Foo.where(finish: time).count
    assert_equal time.to_s, foo.start.to_s
    assert_equal time.to_s, foo.finish.to_s
    assert_equal 000000, foo.start.usec
    assert_equal 999900, foo.finish.usec
  end

  def test_schema_dump_includes_time_precision
    @connection.create_table(:foos, force: true) do |t|
      t.time :start,  precision: 4
      t.time :finish, precision: 6
    end
    output = dump_table_schema("foos")
    assert_match %r{t\.time\s+"start",\s+precision: 4$}, output
    assert_match %r{t\.time\s+"finish",\s+precision: 6$}, output
  end

  if current_adapter?(:PostgreSQLAdapter)
    def test_time_precision_with_zero_should_be_dumped
      @connection.create_table(:foos, force: true) do |t|
        t.time :start,  precision: 0
        t.time :finish, precision: 0
      end
      output = dump_table_schema("foos")
      assert_match %r{t\.time\s+"start",\s+precision: 0$}, output
      assert_match %r{t\.time\s+"finish",\s+precision: 0$}, output
    end
  end

end
end