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require_relative "spec_helper"
describe "Database transactions" do
before(:all) do
@db = DB
@db.create_table!(:items, :engine=>'InnoDB'){String :name; Integer :value}
@d = @db[:items]
end
before do
@d.delete
end
after(:all) do
@db.drop_table?(:items)
end
it "should support transactions" do
@db.transaction{@d.insert(:name => 'abc', :value => 1)}
@d.count.must_equal 1
end
it "should have #transaction yield the connection" do
@db.transaction{|conn| conn.wont_equal nil}
end
it "should have #in_transaction? work correctly" do
@db.in_transaction?.must_equal false
c = nil
@db.transaction{c = @db.in_transaction?}
c.must_equal true
end
it "should correctly rollback transactions" do
proc do
@db.transaction do
@d.insert(:name => 'abc', :value => 1)
raise Interrupt, 'asdf'
end
end.must_raise(Interrupt)
@db.transaction do
@d.insert(:name => 'abc', :value => 1)
raise Sequel::Rollback
end.must_be_nil
proc do
@db.transaction(:rollback=>:reraise) do
@d.insert(:name => 'abc', :value => 1)
raise Sequel::Rollback
end
end.must_raise(Sequel::Rollback)
@db.transaction(:rollback=>:always) do
@d.insert(:name => 'abc', :value => 1)
2
end.must_equal 2
@d.count.must_equal 0
end
it "should support nested transactions" do
@db.transaction do
@db.transaction do
@d.insert(:name => 'abc', :value => 1)
end
end
@d.count.must_equal 1
@d.delete
@db.transaction do
@d.insert(:name => 'abc', :value => 1)
@db.transaction do
raise Sequel::Rollback
end
end
@d.count.must_equal 0
proc {@db.transaction do
@d.insert(:name => 'abc', :value => 1)
@db.transaction do
raise Interrupt, 'asdf'
end
end}.must_raise(Interrupt)
@d.count.must_equal 0
end
if DB.supports_savepoints?
it "should handle table_exists? failures inside transactions" do
@db.transaction do
@d.insert(:name => '1')
@db.table_exists?(:asadf098asd9asd98sa).must_equal false
@d.insert(:name => '2')
end
@d.select_order_map(:name).must_equal %w'1 2'
end
it "should handle :rollback=>:always inside transactions" do
@db.transaction do
@db.transaction(:rollback=>:always) do
@d.insert(:name => 'abc', :value => 1)
2
end.must_equal 2
end
@d.select_order_map(:value).must_equal []
end
it "should handle table_exists? failures inside savepoints" do
@db.transaction do
@d.insert(:name => '1')
@db.transaction(:savepoint=>true) do
@d.insert(:name => '2')
@db.table_exists?(:asadf098asd9asd98sa).must_equal false
@d.insert(:name => '3')
end
@d.insert(:name => '4')
end
@d.select_order_map(:name).must_equal %w'1 2 3 4'
end
it "should support nested transactions through savepoints using the savepoint option" do
@db.transaction do
@d.insert(:name => '1')
@db.transaction(:savepoint=>true) do
@d.insert(:name => '2')
@db.transaction do
@d.insert(:name => '3')
raise Sequel::Rollback
end
end
@d.insert(:name => '4')
@db.transaction do
@d.insert(:name => '6')
@db.transaction(:savepoint=>true) do
@d.insert(:name => '7')
raise Sequel::Rollback
end
end
@d.insert(:name => '5')
end
@d.order(:name).map(:name).must_equal %w{1 4 5 6}
end
it "should support nested transactions through savepoints using the auto_savepoint option" do
@db.transaction(:auto_savepoint=>true) do
@d.insert(:name => '1')
@db.transaction do
@d.insert(:name => '2')
@db.transaction do
@d.insert(:name => '3')
raise Sequel::Rollback
end
end
@d.insert(:name => '4')
@db.transaction(:auto_savepoint=>true) do
@d.insert(:name => '6')
@db.transaction do
@d.insert(:name => '7')
raise Sequel::Rollback
end
end
@d.insert(:name => '5')
end
@d.order(:name).map(:name).must_equal %w{1 4 5 6}
end
end
it "should handle returning inside of the block by committing" do
def ret_commit
@db.transaction do
@db[:items].insert(:name => 'abc')
return
end
end
@d.count.must_equal 0
ret_commit
@d.count.must_equal 1
ret_commit
@d.count.must_equal 2
proc do
@db.transaction do
raise Interrupt, 'asdf'
end
end.must_raise(Interrupt)
@d.count.must_equal 2
end
if DB.supports_prepared_transactions?
it "should allow saving and destroying of model objects" do
c = Class.new(Sequel::Model(@d))
c.set_primary_key :name
c.unrestrict_primary_key
@db.transaction(:prepare=>'XYZ'){c.create(:name => '1'); c.create(:name => '2').destroy}
@db.commit_prepared_transaction('XYZ')
@d.select_order_map(:name).must_equal ['1']
end
it "should commit prepared transactions using commit_prepared_transaction" do
@db.transaction(:prepare=>'XYZ'){@d.insert(:name => '1')}
@db.commit_prepared_transaction('XYZ')
@d.select_order_map(:name).must_equal ['1']
end
it "should rollback prepared transactions using rollback_prepared_transaction" do
@db.transaction(:prepare=>'XYZ'){@d.insert(:name => '1')}
@db.rollback_prepared_transaction('XYZ')
@d.select_order_map(:name).must_equal []
end
if DB.supports_savepoints_in_prepared_transactions?
it "should support savepoints when using prepared transactions" do
@db.transaction(:prepare=>'XYZ'){@db.transaction(:savepoint=>true){@d.insert(:name => '1')}}
@db.commit_prepared_transaction('XYZ')
@d.select_order_map(:name).must_equal ['1']
end
end
end
it "should support all transaction isolation levels" do
[:uncommitted, :committed, :repeatable, :serializable].each_with_index do |l, i|
@db.transaction(:isolation=>l){@d.insert(:name => 'abc', :value => 1)}
@d.count.must_equal i + 1
end
end
it "should support after_commit outside transactions" do
c = nil
@db.after_commit{c = 1}
c.must_equal 1
end
it "should support after_rollback outside transactions" do
c = nil
@db.after_rollback{c = 1}
c.must_be_nil
end
it "should support after_commit inside transactions" do
c = nil
@db.transaction{@db.after_commit{c = 1}; c.must_be_nil}
c.must_equal 1
end
it "should support after_rollback inside transactions" do
c = nil
@db.transaction{@db.after_rollback{c = 1}; c.must_be_nil}
c.must_be_nil
end
it "should not call after_commit if the transaction rolls back" do
c = nil
@db.transaction{@db.after_commit{c = 1}; c.must_be_nil; raise Sequel::Rollback}
c.must_be_nil
end
it "should call after_rollback if the transaction rolls back" do
c = nil
@db.transaction{@db.after_rollback{c = 1}; c.must_be_nil; raise Sequel::Rollback}
c.must_equal 1
end
it "should support multiple after_commit blocks inside transactions" do
c = []
@db.transaction{@db.after_commit{c << 1}; @db.after_commit{c << 2}; c.must_equal []}
c.must_equal [1, 2]
end
it "should support multiple after_rollback blocks inside transactions" do
c = []
@db.transaction{@db.after_rollback{c << 1}; @db.after_rollback{c << 2}; c.must_equal []; raise Sequel::Rollback}
c.must_equal [1, 2]
end
it "should support after_commit inside nested transactions" do
c = nil
@db.transaction{@db.transaction{@db.after_commit{c = 1}}; c.must_be_nil}
c.must_equal 1
end
it "should support after_rollback inside nested transactions" do
c = nil
@db.transaction{@db.transaction{@db.after_rollback{c = 1}}; c.must_be_nil; raise Sequel::Rollback}
c.must_equal 1
end
if DB.supports_savepoints?
it "should support after_commit inside savepoints" do
c = nil
@db.transaction{@db.transaction(:savepoint=>true){@db.after_commit{c = 1}}; c.must_be_nil}
c.must_equal 1
end
it "should support after_rollback inside savepoints" do
c = nil
@db.transaction{@db.transaction(:savepoint=>true){@db.after_rollback{c = 1}}; c.must_be_nil; raise Sequel::Rollback}
c.must_equal 1
end
end
if DB.supports_prepared_transactions?
it "should raise an error if you attempt to use after_commit or after_rollback inside a prepared transaction" do
proc{@db.transaction(:prepare=>'XYZ'){@db.after_commit{}}}.must_raise(Sequel::Error)
proc{@db.transaction(:prepare=>'XYZ'){@db.after_rollback{}}}.must_raise(Sequel::Error)
end
if DB.supports_savepoints_in_prepared_transactions?
it "should raise an error if you attempt to use after_commit or after rollback inside a savepoint in a prepared transaction" do
proc{@db.transaction(:prepare=>'XYZ'){@db.transaction(:savepoint=>true){@db.after_commit{}}}}.must_raise(Sequel::Error)
proc{@db.transaction(:prepare=>'XYZ'){@db.transaction(:savepoint=>true){@db.after_rollback{}}}}.must_raise(Sequel::Error)
end
end
end
end
describe "Database transaction retrying" do
before(:all) do
@db = DB
@db.create_table!(:items, :engine=>'InnoDB'){String :a, :unique=>true, :null=>false}
@d = @db[:items]
end
before do
@d.delete
end
after(:all) do
@db.drop_table?(:items)
end
it "should be supported using the :retry_on option" do
@d.insert('b')
@d.insert('c')
s = 'a'
@db.transaction(:retry_on=>Sequel::ConstraintViolation) do
s = s.succ
@d.insert(s)
end
@d.select_order_map(:a).must_equal %w'b c d'
end
it "should limit number of retries via the :num_retries option" do
@d.insert('b')
@d.insert('c')
s = 'a'
lambda do
@db.transaction(:num_retries=>1, :retry_on=>Sequel::ConstraintViolation) do
s = s.succ
@d.insert(s)
end
end.must_raise(Sequel::UniqueConstraintViolation, Sequel::ConstraintViolation)
@d.select_order_map(:a).must_equal %w'b c'
end
end
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