instiki/vendor/plugins/sqlite3-ruby/test/test_integration_pending.rb

require 'helper'

require 'thread'
require 'benchmark'

class TC_Integration_Pending < Test::Unit::TestCase
  def setup
    @db = SQLite3::Database.new("test.db")
    @db.transaction do
      @db.execute "create table foo ( a integer primary key, b text )"
      @db.execute "insert into foo ( b ) values ( 'foo' )"
      @db.execute "insert into foo ( b ) values ( 'bar' )"
      @db.execute "insert into foo ( b ) values ( 'baz' )"
    end
  end

  def teardown
    @db.close
    File.delete( "test.db" )
  end

  def test_busy_handler_outwait
    busy = Mutex.new
    busy.lock
    handler_call_count = 0

    t = Thread.new(busy) do |locker|
      begin
        db2 = SQLite3::Database.open( "test.db" )
        db2.transaction( :exclusive ) do
          locker.lock
        end
      ensure
        db2.close if db2
      end
    end

    @db.busy_handler do |data,count|
      handler_call_count += 1
      busy.unlock
      true
    end

    assert_nothing_raised do
      @db.execute "insert into foo (b) values ( 'from 2' )"
    end

    t.join

    assert_equal 1, handler_call_count
  end

  def test_busy_handler_impatient
    busy = Mutex.new
    busy.lock
    handler_call_count = 0

    t = Thread.new do
      begin
        db2 = SQLite3::Database.open( "test.db" )
        db2.transaction( :exclusive ) do
          busy.lock
        end
      ensure
        db2.close if db2
      end
    end
    sleep 1

    @db.busy_handler do |count|
      handler_call_count += 1
      false
    end

    assert_raise( SQLite3::BusyException ) do
      @db.execute "insert into foo (b) values ( 'from 2' )"
    end

    busy.unlock
    t.join

    assert_equal 1, handler_call_count
  end

  def test_busy_timeout
    @db.busy_timeout 1000
    busy = Mutex.new
    busy.lock

    t = Thread.new do
      begin
        db2 = SQLite3::Database.open( "test.db" )
        db2.transaction( :exclusive ) do
          busy.lock
        end
      ensure
        db2.close if db2
      end
    end

    sleep 1
    time = Benchmark.measure do
      assert_raise( SQLite3::BusyException ) do
        @db.execute "insert into foo (b) values ( 'from 2' )"
      end
    end

    busy.unlock
    t.join

    assert time.real*1000 >= 1000
  end
end