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