Extract `DateTimePrecisionTest`

The datetime precision tests for any adapters is duplicated.

1 files changed, 0 insertions, 84 deletions

diff --git a/activerecord/test/cases/adapters/mysql2/datetime_test.rb b/activerecord/test/cases/adapters/mysql2/datetime_test.rb
deleted file mode 100644
index 7a37247d6a..0000000000
--- a/activerecord/test/cases/adapters/mysql2/datetime_test.rb
+++ /dev/null
@@ -1,84 +0,0 @@
-require 'cases/helper'
-
-if mysql_56?
-  class DateTimeTest < ActiveRecord::TestCase
-    self.use_transactional_fixtures = false
-
-    teardown do
-      ActiveRecord::Base.connection.drop_table(:foos, if_exists: true)
-    end
-
-    class Foo < ActiveRecord::Base; end
-
-    def test_datetime_data_type_with_precision
-      ActiveRecord::Base.connection.create_table(:foos, force: true)
-      ActiveRecord::Base.connection.add_column :foos, :created_at, :datetime, precision: 1
-      ActiveRecord::Base.connection.add_column :foos, :updated_at, :datetime, precision: 5
-      assert_equal 1, activerecord_column_option('foos', 'created_at', 'precision')
-      assert_equal 5, activerecord_column_option('foos', 'updated_at', 'precision')
-    end
-
-    def test_timestamps_helper_with_custom_precision
-      ActiveRecord::Base.connection.create_table(:foos, force: true) do |t|
-        t.timestamps null: true, precision: 4
-      end
-      assert_equal 4, activerecord_column_option('foos', 'created_at', 'precision')
-      assert_equal 4, activerecord_column_option('foos', 'updated_at', 'precision')
-    end
-
-    def test_passing_precision_to_datetime_does_not_set_limit
-      ActiveRecord::Base.connection.create_table(:foos, force: true) do |t|
-        t.timestamps null: true, precision: 4
-      end
-      assert_nil activerecord_column_option('foos', 'created_at', 'limit')
-      assert_nil activerecord_column_option('foos', 'updated_at', 'limit')
-    end
-
-    def test_invalid_datetime_precision_raises_error
-      assert_raises ActiveRecord::ActiveRecordError do
-        ActiveRecord::Base.connection.create_table(:foos, force: true) do |t|
-          t.timestamps null: true, precision: 7
-        end
-      end
-    end
-
-    def test_mysql_agrees_with_activerecord_about_precision
-      ActiveRecord::Base.connection.create_table(:foos, force: true) do |t|
-        t.timestamps null: true, precision: 4
-      end
-      assert_equal 4, mysql_datetime_precision('foos', 'created_at')
-      assert_equal 4, mysql_datetime_precision('foos', 'updated_at')
-    end
-
-    def test_formatting_datetime_according_to_precision
-      ActiveRecord::Base.connection.create_table(:foos, force: true) do |t|
-        t.datetime :created_at, precision: 0
-        t.datetime :updated_at, precision: 4
-      end
-      date = ::Time.utc(2014, 8, 17, 12, 30, 0, 999999)
-      Foo.create!(created_at: date, updated_at: date)
-      assert foo = Foo.find_by(created_at: date)
-      assert_equal date.to_s, foo.created_at.to_s
-      assert_equal date.to_s, foo.updated_at.to_s
-      assert_equal 000000, foo.created_at.usec
-      assert_equal 999900, foo.updated_at.usec
-    end
-
-    private
-
-    def mysql_datetime_precision(table_name, column_name)
-      results = ActiveRecord::Base.connection.exec_query("SELECT column_name, datetime_precision FROM information_schema.columns WHERE table_name = '#{table_name}'")
-      result = results.find do |result_hash|
-        result_hash["column_name"] == column_name
-      end
-      result && result["datetime_precision"]
-    end
-
-    def activerecord_column_option(tablename, column_name, option)
-      result = ActiveRecord::Base.connection.columns(tablename).find do |column|
-        column.name == column_name
-      end
-      result && result.send(option)
-    end
-  end
-end