You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 

69 lines
1.8 KiB

// Copyright 2019 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package deadlock
import (
"fmt"
"testing"
. "github.com/pingcap/check"
)
func TestT(t *testing.T) {
TestingT(t)
}
var _ = Suite(&testDeadlockSuite{})
type testDeadlockSuite struct{}
func (s *testDeadlockSuite) TestDeadlock(c *C) {
detector := NewDetector()
err := detector.Detect(1, 2, 100)
c.Assert(err, IsNil)
err = detector.Detect(2, 3, 200)
c.Assert(err, IsNil)
err = detector.Detect(3, 1, 300)
c.Assert(err, NotNil)
c.Assert(err.Error(), Equals, fmt.Sprintf("deadlock(200)"))
detector.CleanUp(2)
list2 := detector.waitForMap[2]
c.Assert(list2, IsNil)
// After cycle is broken, no deadlock now.
err = detector.Detect(3, 1, 300)
c.Assert(err, IsNil)
list3 := detector.waitForMap[3]
c.Assert(list3.txns, HasLen, 1)
// Different keyHash grows the list.
err = detector.Detect(3, 1, 400)
c.Assert(err, IsNil)
c.Assert(list3.txns, HasLen, 2)
// Same waitFor and key hash doesn't grow the list.
err = detector.Detect(3, 1, 400)
c.Assert(err, IsNil)
c.Assert(list3.txns, HasLen, 2)
detector.CleanUpWaitFor(3, 1, 300)
c.Assert(list3.txns, HasLen, 1)
detector.CleanUpWaitFor(3, 1, 400)
list3 = detector.waitForMap[3]
c.Assert(list3, IsNil)
detector.Expire(1)
c.Assert(detector.waitForMap, HasLen, 1)
detector.Expire(2)
c.Assert(detector.waitForMap, HasLen, 0)
}