SEQUEL_ADAPTER_TEST = :sqlite

require File.join(File.dirname(File.expand_path(__FILE__)), 'spec_helper.rb')

describe "An SQLite database" do
  before do
    @db = DB
    @fk = @db.foreign_keys
  end
  after do
    @db.drop_table?(:fk)
    @db.auto_vacuum = :none
    @db.run 'VACUUM'
    @db.foreign_keys = @fk
    @db.case_sensitive_like = true
    @db.use_timestamp_timezones = false
    Sequel.datetime_class = Time
  end

  it "should support getting setting pragma values" do
    @db.pragma_set(:auto_vacuum, '0')
    @db.run 'VACUUM'
    @db.pragma_get(:auto_vacuum).to_s.must_equal '0'
    @db.pragma_set(:auto_vacuum, '1')
    @db.run 'VACUUM'
    @db.pragma_get(:auto_vacuum).to_s.must_equal '1'
    @db.pragma_set(:auto_vacuum, '2')
    @db.run 'VACUUM'
    @db.pragma_get(:auto_vacuum).to_s.must_equal '2'
  end
  
  it "should support getting and setting the auto_vacuum pragma" do
    @db.auto_vacuum = :full
    @db.run 'VACUUM'
    @db.auto_vacuum.must_equal :full
    @db.auto_vacuum = :incremental
    @db.run 'VACUUM'
    @db.auto_vacuum.must_equal :incremental
    
    proc {@db.auto_vacuum = :invalid}.must_raise(Sequel::Error)
  end
  
  it "should respect case sensitive like false" do
    @db.case_sensitive_like = false
    @db.get(Sequel.like('a', 'A')).to_s.must_equal '1'
  end
  
  it "should respect case sensitive like true" do
    @db.case_sensitive_like = true
    @db.get(Sequel.like('a', 'A')).to_s.must_equal '0'
  end
  
  it "should support casting to Date by using the date function" do
    @db.get(Sequel.cast('2012-10-20 11:12:13', Date)).must_equal '2012-10-20'
  end
  
  it "should support casting to Time or DateTime by using the datetime function" do
    @db.get(Sequel.cast('2012-10-20', Time)).must_equal '2012-10-20 00:00:00'
    @db.get(Sequel.cast('2012-10-20', DateTime)).must_equal '2012-10-20 00:00:00'
  end
  
  it "should provide the SQLite version as an integer" do
    @db.sqlite_version.must_be_kind_of(Integer)
  end
  
  it "should support setting and getting the foreign_keys pragma" do
    (@db.sqlite_version >= 30619 ? [true, false] : [nil]).must_include(@db.foreign_keys)
    @db.foreign_keys = true
    @db.foreign_keys = false
  end
  
  it "should enforce foreign key integrity if foreign_keys pragma is set" do
    @db.foreign_keys = true
    @db.create_table!(:fk){primary_key :id; foreign_key :parent_id, :fk}
    @db[:fk].insert(1, nil)
    @db[:fk].insert(2, 1)
    @db[:fk].insert(3, 3)
    proc{@db[:fk].insert(4, 5)}.must_raise(Sequel::ForeignKeyConstraintViolation, Sequel::ConstraintViolation, Sequel::DatabaseError)
  end if DB.sqlite_version >= 30619
  
  it "should not enforce foreign key integrity if foreign_keys pragma is unset" do
    @db.foreign_keys = false
    @db.create_table!(:fk){primary_key :id; foreign_key :parent_id, :fk}
    @db[:fk].insert(1, 2)
    @db[:fk].all.must_equal [{:id=>1, :parent_id=>2}]
  end
  
  it "should support a use_timestamp_timezones setting" do
    @db.use_timestamp_timezones = true
    @db.create_table!(:fk){Time :time}
    @db[:fk].insert(Time.now)
    @db[:fk].get(Sequel.cast(:time, String)).must_match(/[-+]\d\d\d\d\z/)
    @db.use_timestamp_timezones = false
    @db[:fk].delete
    @db[:fk].insert(Time.now)
    @db[:fk].get(Sequel.cast(:time, String)).wont_match(/[-+]\d\d\d\d\z/)
  end
  
  it "should provide a list of existing tables" do
    @db.drop_table?(:fk)
    @db.tables.must_be_kind_of(Array)
    @db.tables.wont_include(:fk)
    @db.create_table!(:fk){String :name}
    @db.tables.must_include(:fk)
  end

  it "should support getting and setting the synchronous pragma" do
    @db.synchronous = :off
    @db.synchronous.must_equal :off
    @db.synchronous = :normal
    @db.synchronous.must_equal :normal
    @db.synchronous = :full
    @db.synchronous.must_equal :full
    
    proc {@db.synchronous = :invalid}.must_raise(Sequel::Error)
  end
  
  it "should support getting and setting the temp_store pragma" do
    @db.temp_store = :default
    @db.temp_store.must_equal :default
    @db.temp_store = :file
    @db.temp_store.must_equal :file
    @db.temp_store = :memory
    @db.temp_store.must_equal :memory
    
    proc {@db.temp_store = :invalid}.must_raise(Sequel::Error)
  end
  
  cspecify "should support timestamps and datetimes and respect datetime_class", [:do], [:jdbc], [:swift] do
    @db.create_table!(:fk){timestamp :t; datetime :d}
    @db.use_timestamp_timezones = true
    t1 = Time.at(1)
    @db[:fk] << {:t => t1, :d => t1}
    @db[:fk].map(:t).must_equal [t1]
    @db[:fk].map(:d).must_equal [t1]
    Sequel.datetime_class = DateTime
    t2 = Sequel.string_to_datetime(t1.iso8601)
    @db[:fk].map(:t).must_equal [t2]
    @db[:fk].map(:d).must_equal [t2]
  end
  
  it "should support sequential primary keys" do
    @db.create_table!(:fk) {primary_key :id; text :name}
    @db[:fk] << {:name => 'abc'}
    @db[:fk] << {:name => 'def'}
    @db[:fk] << {:name => 'ghi'}
    @db[:fk].order(:name).all.must_equal [
      {:id => 1, :name => 'abc'},
      {:id => 2, :name => 'def'},
      {:id => 3, :name => 'ghi'}
    ]
  end
  
  it "should correctly parse the schema" do
    @db.create_table!(:fk) {timestamp :t}
    @db.schema(:fk, :reload=>true).must_equal [[:t, {:type=>:datetime, :allow_null=>true, :default=>nil, :ruby_default=>nil, :db_type=>"timestamp", :primary_key=>false}]]
  end

  it "should handle and return BigDecimal values for numeric columns" do
    DB.create_table!(:fk){numeric :d}
    d = DB[:fk]
    d.insert(:d=>BigDecimal.new('80.0'))
    d.insert(:d=>BigDecimal.new('NaN'))
    d.insert(:d=>BigDecimal.new('Infinity'))
    d.insert(:d=>BigDecimal.new('-Infinity'))
    ds = d.all
    ds.shift.must_equal(:d=>BigDecimal.new('80.0'))
    ds.map{|x| x[:d].to_s}.must_equal %w'NaN Infinity -Infinity'
    DB
  end
end

describe "SQLite temporary views" do
  before do
    @db = DB
    @db.drop_view(:items) rescue nil
    @db.create_table!(:items){Integer :number}
    @db[:items].insert(10)
    @db[:items].insert(20)
  end
  after do
    @db.drop_table?(:items)
  end

  it "should be supported" do
    @db.create_view(:items_view, @db[:items].where(:number=>10),  :temp=>true)
    @db[:items_view].map(:number).must_equal [10]
    @db.disconnect
    lambda{@db[:items_view].map(:number)}.must_raise(Sequel::DatabaseError)
  end
end
    
describe "SQLite VALUES support" do
  before do
    @db = DB
  end

  it "should create a dataset using the VALUES clause via #values" do
    @db.values([[1, 2], [3, 4]]).map([:column1, :column2]).must_equal [[1, 2], [3, 4]]
  end

  it "should support VALUES with unions" do
    @db.values([[1]]).union(@db.values([[3]])).map(&:values).map(&:first).must_equal [1, 3]
  end

  it "should support VALUES in CTEs" do
    @db[:a].cross_join(:b).with(:a, @db.values([[1, 2]]), :args=>[:c1, :c2]).with(:b, @db.values([[3, 4]]), :args=>[:c3, :c4]).map([:c1, :c2, :c3, :c4]).must_equal [[1, 2, 3, 4]]
  end
end if DB.sqlite_version >= 30803

describe "SQLite type conversion" do
  before do
    @db = DB
    @integer_booleans = @db.integer_booleans
    @db.integer_booleans = true
    @ds = @db[:items]
    @db.drop_table?(:items)
  end
  after do
    @db.integer_booleans = @integer_booleans
    Sequel.datetime_class = Time
    @db.drop_table?(:items)
  end
  
  it "should handle integers in boolean columns" do
    @db.create_table(:items){TrueClass :a}
    @db[:items].insert(false)
    @db[:items].select_map(:a).must_equal [false]
    @db[:items].select_map(Sequel.expr(:a)+:a).must_equal [0]
    @db[:items].update(:a=>true)
    @db[:items].select_map(:a).must_equal [true]
    @db[:items].select_map(Sequel.expr(:a)+:a).must_equal [2]
  end
  
  it "should handle integers/floats/strings/decimals in numeric/decimal columns" do
    @db.create_table(:items){Numeric :a}
    @db[:items].insert(100)
    @db[:items].select_map(:a).must_equal [BigDecimal.new('100')]
    @db[:items].get(:a).must_be_kind_of(BigDecimal)

    @db[:items].update(:a=>100.1)
    @db[:items].select_map(:a).must_equal [BigDecimal.new('100.1')]
    @db[:items].get(:a).must_be_kind_of(BigDecimal)

    @db[:items].update(:a=>'100.1')
    @db[:items].select_map(:a).must_equal [BigDecimal.new('100.1')]
    @db[:items].get(:a).must_be_kind_of(BigDecimal)

    @db[:items].update(:a=>BigDecimal.new('100.1'))
    @db[:items].select_map(:a).must_equal [BigDecimal.new('100.1')]
    @db[:items].get(:a).must_be_kind_of(BigDecimal)
  end

  it "should handle integer/float date columns as julian date" do
    @db.create_table(:items){Date :a}
    i = 2455979
    @db[:items].insert(i)
    @db[:items].first.must_equal(:a=>Date.jd(i))
    @db[:items].update(:a=>2455979.1)
    @db[:items].first.must_equal(:a=>Date.jd(i))
  end

  it "should handle integer/float time columns as seconds" do
    @db.create_table(:items){Time :a, :only_time=>true}
    @db[:items].insert(3661)
    @db[:items].first.must_equal(:a=>Sequel::SQLTime.create(1, 1, 1))
    @db[:items].update(:a=>3661.000001)
    @db[:items].first.must_equal(:a=>Sequel::SQLTime.create(1, 1, 1, 1))
  end

  it "should handle integer datetime columns as unix timestamp" do
    @db.create_table(:items){DateTime :a}
    i = 1329860756
    @db[:items].insert(i)
    @db[:items].first.must_equal(:a=>Time.at(i))
    Sequel.datetime_class = DateTime
    @db[:items].first.must_equal(:a=>DateTime.strptime(i.to_s, '%s'))
  end

  it "should handle float datetime columns as julian date" do
    @db.create_table(:items){DateTime :a}
    i = 2455979.5
    @db[:items].insert(i)
    @db[:items].first.must_equal(:a=>Time.at(1329825600))
    Sequel.datetime_class = DateTime
    @db[:items].first.must_equal(:a=>DateTime.jd(2455979.5))
  end

  it "should handle integer/float blob columns" do
    @db.create_table(:items){File :a}
    @db[:items].insert(1)
    @db[:items].first.must_equal(:a=>Sequel::SQL::Blob.new('1'))
    @db[:items].update(:a=>'1.1')
    @db[:items].first.must_equal(:a=>Sequel::SQL::Blob.new(1.1.to_s))
  end
end if DB.adapter_scheme == :sqlite

describe "An SQLite dataset" do
  before do
    @d = DB.dataset
  end
  
  it "should raise errors if given a regexp pattern match" do
    proc{@d.literal(Sequel.expr(:x).like(/a/))}.must_raise(Sequel::InvalidOperation)
    proc{@d.literal(~Sequel.expr(:x).like(/a/))}.must_raise(Sequel::InvalidOperation)
    proc{@d.literal(Sequel.expr(:x).like(/a/i))}.must_raise(Sequel::InvalidOperation)
    proc{@d.literal(~Sequel.expr(:x).like(/a/i))}.must_raise(Sequel::InvalidOperation)
  end
end

describe "An SQLite dataset AS clause" do
  it "should use a string literal for Sequel[:col].as(:alias)" do
    DB.literal(Sequel[:c].as(:a)).must_equal "`c` AS 'a'"
  end

  it "should use a string literal for Sequel[:table][:col].as(:alias)" do
    DB.literal(Sequel[:t][:c].as(:a)).must_equal "`t`.`c` AS 'a'"
  end

  it "should use a string literal for :column.as(:alias)" do
    DB.literal(Sequel.as(:c, :a)).must_equal "`c` AS 'a'"
  end

  it "should use a string literal in the SELECT clause" do
    DB[:t].select(Sequel[:c].as(:a)).sql.must_equal "SELECT `c` AS 'a' FROM `t`"
  end

  it "should use a string literal in the FROM clause" do
    DB[Sequel[:t].as(:a)].sql.must_equal "SELECT * FROM `t` AS 'a'"
  end

  it "should use a string literal in the JOIN clause" do
    DB[:t].join_table(:natural, :j, nil, :table_alias=>:a).sql.must_equal "SELECT * FROM `t` NATURAL JOIN `j` AS 'a'"
  end
end

describe "SQLite::Dataset#delete" do
  before do
    DB.create_table! :items do
      primary_key :id
      String :name
      Float :value
    end
    @d = DB[:items]
    @d.delete # remove all records
    @d << {:name => 'abc', :value => 1.23}
    @d << {:name => 'def', :value => 4.56}
    @d << {:name => 'ghi', :value => 7.89}
  end
  after do
    DB.drop_table?(:items)
  end
  
  it "should return the number of records affected when filtered" do
    @d.count.must_equal 3
    @d.filter{value < 3}.delete.must_equal 1
    @d.count.must_equal 2

    @d.filter{value < 3}.delete.must_equal 0
    @d.count.must_equal 2
  end
  
  it "should return the number of records affected when unfiltered" do
    @d.count.must_equal 3
    @d.delete.must_equal 3
    @d.count.must_equal 0

    @d.delete.must_equal 0
  end
end

describe "SQLite::Dataset#update" do
  before do
    DB.create_table! :items do
      primary_key :id
      String :name
      Float :value
    end
    @d = DB[:items]
    @d.delete # remove all records
    @d << {:name => 'abc', :value => 1.23}
    @d << {:name => 'def', :value => 4.56}
    @d << {:name => 'ghi', :value => 7.89}
  end
  
  it "should return the number of records affected" do
    @d.filter(:name => 'abc').update(:value => 2).must_equal 1
    
    @d.update(:value => 10).must_equal 3
    
    @d.filter(:name => 'xxx').update(:value => 23).must_equal 0
  end
end

describe "SQLite::Dataset#insert_conflict" do
  before(:all) do
    DB.create_table! :ic_test do
      primary_key :id
      String :name
    end
  end

  after(:each) do
    DB[:ic_test].delete
  end

  after(:all) do
    DB.drop_table?(:ic_test)
  end

  it "Dataset#insert_ignore and insert_constraint should ignore uniqueness violations" do
    DB[:ic_test].insert(:id => 1, :name => "one")
    proc {DB[:ic_test].insert(:id => 1, :name => "one")}.must_raise Sequel::ConstraintViolation

    DB[:ic_test].insert_ignore.insert(:id => 1, :name => "one")
    DB[:ic_test].all.must_equal([{:id => 1, :name => "one"}])

    DB[:ic_test].insert_conflict(:ignore).insert(:id => 1, :name => "one")
    DB[:ic_test].all.must_equal([{:id => 1, :name => "one"}])
  end

  it "Dataset#insert_constraint should handle replacement" do
    DB[:ic_test].insert(:id => 1, :name => "one")

    DB[:ic_test].insert_conflict(:replace).insert(:id => 1, :name => "two")
    DB[:ic_test].all.must_equal([{:id => 1, :name => "two"}])
  end
end

describe "SQLite dataset" do
  before do
    DB.create_table! :test do
      primary_key :id
      String :name
      Float :value
    end
    DB.create_table! :items do
      primary_key :id
      String :name
      Float :value
    end
    @d = DB[:items]
    @d << {:name => 'abc', :value => 1.23}
    @d << {:name => 'def', :value => 4.56}
    @d << {:name => 'ghi', :value => 7.89}
  end
  after do
    DB.drop_table?(:test, :items)
  end
  
  it "should be able to insert from a subquery" do
    DB[:test] << @d
    DB[:test].count.must_equal 3
    DB[:test].select(:name, :value).order(:value).to_a.must_equal \
      @d.select(:name, :value).order(:value).to_a
  end
    
  it "should support #explain" do
    DB[:test].explain.must_be_kind_of(String)
  end
  
  it "should have #explain work when identifier_output_method is modified" do
    DB[:test].with_identifier_output_method(:upcase).explain.must_be_kind_of(String)
  end if IDENTIFIER_MANGLING
end

describe "A SQLite database" do
  before do
    @db = DB
    @db.create_table! :test2 do
      text :name
      integer :value
    end
  end
  after do
    @db.drop_table?(:test, :test2, :test3, :test3_backup0, :test3_backup1, :test3_backup2)
  end

  it "should support add_column operations" do
    @db.add_column :test2, :xyz, :text
    
    @db[:test2].columns.must_equal [:name, :value, :xyz]
    @db[:test2] << {:name => 'mmm', :value => 111, :xyz=>'000'}
    @db[:test2].first.must_equal(:name => 'mmm', :value => 111, :xyz=>'000')
  end
  
  it "should support drop_column operations" do
    @db.drop_column :test2, :value
    @db[:test2].columns.must_equal [:name]
    @db[:test2] << {:name => 'mmm'}
    @db[:test2].first.must_equal(:name => 'mmm')
  end
  
  it "should support drop_column operations in a transaction" do
    @db.transaction{@db.drop_column :test2, :value}
    @db[:test2].columns.must_equal [:name]
    @db[:test2] << {:name => 'mmm'}
    @db[:test2].first.must_equal(:name => 'mmm')
  end

  it "should keep a composite primary key when dropping columns" do
    @db.create_table!(:test2){Integer :a; Integer :b; Integer :c; primary_key [:a, :b]}
    @db.drop_column :test2, :c
    @db[:test2].columns.must_equal [:a, :b]
    @db[:test2] << {:a=>1, :b=>2}
    @db[:test2] << {:a=>2, :b=>3}
    proc{@db[:test2] << {:a=>2, :b=>3}}.must_raise(Sequel::UniqueConstraintViolation, Sequel::ConstraintViolation, Sequel::DatabaseError)
  end

  it "should keep column attributes when dropping a column" do
    @db.create_table! :test3 do
      primary_key :id
      text :name
      integer :value
    end

    # This lame set of additions and deletions are to test that the primary keys
    # don't get messed up when we recreate the database.
    @db[:test3] << { :name => "foo", :value => 1}
    @db[:test3] << { :name => "foo", :value => 2}
    @db[:test3] << { :name => "foo", :value => 3}
    @db[:test3].filter(:id => 2).delete

    @db.drop_column :test3, :value

    @db['PRAGMA table_info(?)', :test3][:id][:pk].to_i.must_equal 1
    @db[:test3].select(:id).all.must_equal [{:id => 1}, {:id => 3}]
  end

  if DB.foreign_keys
    it "should keep foreign keys when dropping a column" do
      @db.create_table! :test do
        primary_key :id
        String :name
        Integer :value
      end
      @db.create_table! :test3 do
        String :name
        Integer :value
        foreign_key :test_id, :test, :on_delete => :set_null, :on_update => :cascade
      end

      @db[:test3].insert(:name => "abc", :test_id => @db[:test].insert(:name => "foo", :value => 3))
      @db[:test3].insert(:name => "def", :test_id => @db[:test].insert(:name => "bar", :value => 4))

      @db.drop_column :test3, :value

      @db[:test].filter(:name => 'bar').delete
      @db[:test3][:name => 'def'][:test_id].must_be_nil

      @db[:test].filter(:name => 'foo').update(:id=>100)
      @db[:test3][:name => 'abc'][:test_id].must_equal 100
    end
  end

  it "should support rename_column operations" do
    @db[:test2].delete
    @db.add_column :test2, :xyz, :text
    @db[:test2] << {:name => 'mmm', :value => 111, :xyz => 'qqqq'}

    @db[:test2].columns.must_equal [:name, :value, :xyz]
    @db.rename_column :test2, :xyz, :zyx, :type => :text
    @db[:test2].columns.must_equal [:name, :value, :zyx]
    @db[:test2].first[:zyx].must_equal 'qqqq'
    @db[:test2].count.must_equal 1
  end
  
  it "should preserve defaults when dropping or renaming columns" do
    @db.create_table! :test3 do
      String :s, :default=>'a'
      Integer :i
    end

    @db[:test3].insert
    @db[:test3].first[:s].must_equal 'a'
    @db[:test3].delete
    @db.drop_column :test3, :i
    @db[:test3].insert
    @db[:test3].first[:s].must_equal 'a'
    @db[:test3].delete
    @db.rename_column :test3, :s, :t
    @db[:test3].insert
    @db[:test3].first[:t].must_equal 'a'
    @db[:test3].delete
  end


  it "should preserve autoincrement after table modification" do
    @db.create_table!(:test2) do
      primary_key :id
      Integer :val, :null => false
    end
    @db.rename_column(:test2, :val, :value)

    t = @db[:test2]
    id1 = t.insert(:value=>1)
    t.delete
    id2 = t.insert(:value=>1)
    id2.must_be :>, id1
  end
  
  it "should handle quoted tables when dropping or renaming columns" do
    table_name = "T T"
    @db.drop_table?(table_name)
    @db.create_table! table_name do
      Integer :"s s"
      Integer :"i i"
    end

    @db.from(table_name).insert(:"s s"=>1, :"i i"=>2)
    @db.from(table_name).all.must_equal [{:"s s"=>1, :"i i"=>2}]
    @db.drop_column table_name, :"i i"
    @db.from(table_name).all.must_equal [{:"s s"=>1}]
    @db.rename_column table_name, :"s s", :"t t"
    @db.from(table_name).all.must_equal [{:"t t"=>1}]
    @db.drop_table?(table_name)
  end
  
  it "should choose a temporary table name that isn't already used when dropping or renaming columns" do
    sqls = []
    @db.loggers << (l=Class.new{%w'info error'.each{|m| define_method(m){|sql| sqls << sql}}}.new)
    @db.tables.each{|t| @db.drop_table(t) if t.to_s =~ /test3/}
    @db.create_table :test3 do
      Integer :h
      Integer :i
    end
    @db.create_table :test3_backup0 do
      Integer :j
    end
    @db.create_table :test3_backup1 do
      Integer :k
    end

    @db[:test3].columns.must_equal [:h, :i]
    @db[:test3_backup0].columns.must_equal [:j]
    @db[:test3_backup1].columns.must_equal [:k]
    sqls.clear
    @db.drop_column(:test3, :i)
    sqls.any?{|x| x =~ /\AALTER TABLE.*test3.*RENAME TO.*test3_backup2/}.must_equal true
    sqls.any?{|x| x =~ /\AALTER TABLE.*test3.*RENAME TO.*test3_backup[01]/}.must_equal false
    @db[:test3].columns.must_equal [:h]
    @db[:test3_backup0].columns.must_equal [:j]
    @db[:test3_backup1].columns.must_equal [:k]

    @db.create_table :test3_backup2 do
      Integer :l
    end

    sqls.clear
    @db.rename_column(:test3, :h, :i)
    sqls.any?{|x| x =~ /\AALTER TABLE.*test3.*RENAME TO.*test3_backup3/}.must_equal true
    sqls.any?{|x| x =~ /\AALTER TABLE.*test3.*RENAME TO.*test3_backup[012]/}.must_equal false
    @db[:test3].columns.must_equal [:i]
    @db[:test3_backup0].columns.must_equal [:j]
    @db[:test3_backup1].columns.must_equal [:k]
    @db[:test3_backup2].columns.must_equal [:l]
    @db.loggers.delete(l)
  end
  
  it "should support add_index" do
    @db.add_index :test2, :value, :unique => true
    @db.add_index :test2, [:name, :value]
  end
  
  it "should support drop_index" do
    @db.add_index :test2, :value, :unique => true
    @db.drop_index :test2, :value
  end

  it "should keep applicable indexes when emulating schema methods" do
    @db.create_table!(:test3){Integer :a; Integer :b}
    @db.add_index :test3, :a
    @db.add_index :test3, :b
    @db.add_index :test3, [:b, :a]
    @db.drop_column :test3, :b
    @db.indexes(:test3).must_equal(:test3_a_index=>{:unique=>false, :columns=>[:a]})
  end

  it "should have support for various #transaction modes" do
    sqls = []
    @db.loggers << Class.new{%w'info error'.each{|m| define_method(m){|sql| sqls << sql}}}.new

    @db.transaction(:mode => :immediate) do
      sqls.last.must_equal "BEGIN IMMEDIATE TRANSACTION"
    end
    @db.transaction(:mode => :exclusive) do
      sqls.last.must_equal "BEGIN EXCLUSIVE TRANSACTION"
    end
    @db.transaction(:mode => :deferred) do
      sqls.last.must_equal "BEGIN DEFERRED TRANSACTION"
    end
    @db.transaction do
      sqls.last.must_equal Sequel::Database::SQL_BEGIN
    end

    @db.transaction_mode.must_be_nil
    @db.transaction_mode = :immediate
    @db.transaction_mode.must_equal :immediate
    @db.transaction do
      sqls.last.must_equal "BEGIN IMMEDIATE TRANSACTION"
    end
    @db.transaction(:mode => :exclusive) do
      sqls.last.must_equal "BEGIN EXCLUSIVE TRANSACTION"
    end

    proc {@db.transaction_mode = :invalid}.must_raise(Sequel::Error)

    @db.transaction_mode.must_equal :immediate
    proc {@db.transaction(:mode => :invalid) {}}.must_raise(Sequel::Error)
  end

  it "should keep unique constraints when copying tables" do
    @db.alter_table(:test2){add_unique_constraint :name}
    @db.alter_table(:test2){drop_column :value}
    @db[:test2].insert(:name=>'a')
    proc{@db[:test2].insert(:name=>'a')}.must_raise(Sequel::ConstraintViolation, Sequel::UniqueConstraintViolation)
  end
end
