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require "cases/helper"
module ActiveRecord
class MigratorTest < ActiveRecord::TestCase
# Use this class to sense if migrations have gone
# up or down.
class Sensor < ActiveRecord::Migration
attr_reader :went_up, :went_down
def initialize name, version
super
@went_up = false
@went_down = false
end
def up; @went_up = true; end
def down; @went_down = true; end
end
def setup
super
ActiveRecord::SchemaMigration.create_table
ActiveRecord::SchemaMigration.delete_all rescue nil
end
def teardown
super
ActiveRecord::SchemaMigration.delete_all rescue nil
end
def test_migrator_with_duplicate_names
assert_raises(ActiveRecord::DuplicateMigrationNameError, "Multiple migrations have the name Chunky") do
list = [Migration.new('Chunky'), Migration.new('Chunky')]
ActiveRecord::Migrator.new(:up, list)
end
end
def test_migrator_with_duplicate_versions
assert_raises(ActiveRecord::DuplicateMigrationVersionError) do
list = [Migration.new('Foo', 1), Migration.new('Bar', 1)]
ActiveRecord::Migrator.new(:up, list)
end
end
def test_migrator_with_missing_version_numbers
assert_raises(ActiveRecord::UnknownMigrationVersionError) do
list = [Migration.new('Foo', 1), Migration.new('Bar', 2)]
ActiveRecord::Migrator.new(:up, list, 3).run
end
end
def test_finds_migrations
migrations = ActiveRecord::Migrator.migrations(MIGRATIONS_ROOT + "/valid")
[[1, 'ValidPeopleHaveLastNames'], [2, 'WeNeedReminders'], [3, 'InnocentJointable']].each_with_index do |pair, i|
assert_equal migrations[i].version, pair.first
assert_equal migrations[i].name, pair.last
end
end
def test_finds_migrations_in_subdirectories
migrations = ActiveRecord::Migrator.migrations(MIGRATIONS_ROOT + "/valid_with_subdirectories")
[[1, 'ValidPeopleHaveLastNames'], [2, 'WeNeedReminders'], [3, 'InnocentJointable']].each_with_index do |pair, i|
assert_equal migrations[i].version, pair.first
assert_equal migrations[i].name, pair.last
end
end
def test_finds_migrations_from_two_directories
directories = [MIGRATIONS_ROOT + '/valid_with_timestamps', MIGRATIONS_ROOT + '/to_copy_with_timestamps']
migrations = ActiveRecord::Migrator.migrations directories
[[20090101010101, "PeopleHaveHobbies"],
[20090101010202, "PeopleHaveDescriptions"],
[20100101010101, "ValidWithTimestampsPeopleHaveLastNames"],
[20100201010101, "ValidWithTimestampsWeNeedReminders"],
[20100301010101, "ValidWithTimestampsInnocentJointable"]].each_with_index do |pair, i|
assert_equal pair.first, migrations[i].version
assert_equal pair.last, migrations[i].name
end
end
def test_deprecated_constructor
assert_deprecated do
ActiveRecord::Migrator.new(:up, MIGRATIONS_ROOT + "/valid")
end
end
def test_relative_migrations
list = Dir.chdir(MIGRATIONS_ROOT) do
ActiveRecord::Migrator.migrations("valid/")
end
migration_proxy = list.find { |item|
item.name == 'ValidPeopleHaveLastNames'
}
assert migration_proxy, 'should find pending migration'
end
def test_finds_pending_migrations
ActiveRecord::SchemaMigration.create!(:version => '1')
migration_list = [ Migration.new('foo', 1), Migration.new('bar', 3) ]
migrations = ActiveRecord::Migrator.new(:up, migration_list).pending_migrations
assert_equal 1, migrations.size
assert_equal migration_list.last, migrations.first
end
def test_migrator_interleaved_migrations
pass_one = [Sensor.new('One', 1)]
ActiveRecord::Migrator.new(:up, pass_one).migrate
assert pass_one.first.went_up
refute pass_one.first.went_down
pass_two = [Sensor.new('One', 1), Sensor.new('Three', 3)]
ActiveRecord::Migrator.new(:up, pass_two).migrate
refute pass_two[0].went_up
assert pass_two[1].went_up
assert pass_two.all? { |x| !x.went_down }
pass_three = [Sensor.new('One', 1),
Sensor.new('Two', 2),
Sensor.new('Three', 3)]
ActiveRecord::Migrator.new(:down, pass_three).migrate
assert pass_three[0].went_down
refute pass_three[1].went_down
assert pass_three[2].went_down
end
end
end
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