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208 lines
4.7 KiB
208 lines
4.7 KiB
![]()
7 years ago
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/*
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* Minio Cloud Storage, (C) 2017 Minio, 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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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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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*/
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package cmd
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import (
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"math/rand"
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"testing"
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"time"
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)
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func TestDynamicTimeoutSingleIncrease(t *testing.T) {
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timeout := newDynamicTimeout(time.Minute, time.Second)
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initial := timeout.Timeout()
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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timeout.LogFailure()
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}
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adjusted := timeout.Timeout()
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if initial >= adjusted {
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t.Errorf("Failure to increase timeout, expected %v to be more than %v", adjusted, initial)
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}
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}
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func TestDynamicTimeoutDualIncrease(t *testing.T) {
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timeout := newDynamicTimeout(time.Minute, time.Second)
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initial := timeout.Timeout()
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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timeout.LogFailure()
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}
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adjusted := timeout.Timeout()
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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timeout.LogFailure()
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}
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adjustedAgain := timeout.Timeout()
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if initial >= adjusted || adjusted >= adjustedAgain {
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t.Errorf("Failure to increase timeout multiple times")
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}
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}
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func TestDynamicTimeoutSingleDecrease(t *testing.T) {
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timeout := newDynamicTimeout(time.Minute, time.Second)
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initial := timeout.Timeout()
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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timeout.LogSuccess(20 * time.Second)
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}
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adjusted := timeout.Timeout()
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if initial <= adjusted {
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t.Errorf("Failure to decrease timeout, expected %v to be less than %v", adjusted, initial)
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}
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}
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func TestDynamicTimeoutDualDecrease(t *testing.T) {
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timeout := newDynamicTimeout(time.Minute, time.Second)
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initial := timeout.Timeout()
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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timeout.LogSuccess(20 * time.Second)
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}
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adjusted := timeout.Timeout()
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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timeout.LogSuccess(20 * time.Second)
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}
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adjustedAgain := timeout.Timeout()
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if initial <= adjusted || adjusted <= adjustedAgain {
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t.Errorf("Failure to decrease timeout multiple times")
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}
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}
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func TestDynamicTimeoutManyDecreases(t *testing.T) {
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timeout := newDynamicTimeout(time.Minute, time.Second)
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initial := timeout.Timeout()
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const successTimeout = 20 * time.Second
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for l := 0; l < 100; l++ {
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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timeout.LogSuccess(successTimeout)
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}
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}
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adjusted := timeout.Timeout()
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// Check whether eventual timeout is between initial value and success timeout
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if initial <= adjusted || adjusted <= successTimeout {
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t.Errorf("Failure to decrease timeout appropriately")
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}
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}
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func TestDynamicTimeoutHitMinimum(t *testing.T) {
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const minimum = 30 * time.Second
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timeout := newDynamicTimeout(time.Minute, minimum)
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initial := timeout.Timeout()
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const successTimeout = 20 * time.Second
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for l := 0; l < 100; l++ {
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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timeout.LogSuccess(successTimeout)
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}
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}
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adjusted := timeout.Timeout()
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// Check whether eventual timeout has hit the minimum value
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if initial <= adjusted || adjusted != minimum {
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t.Errorf("Failure to decrease timeout appropriately")
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}
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}
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func testDynamicTimeoutAdjust(t *testing.T, timeout *dynamicTimeout, f func() float64) {
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const successTimeout = 20 * time.Second
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for i := 0; i < dynamicTimeoutLogSize; i++ {
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rnd := f()
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duration := time.Duration(float64(successTimeout) * rnd)
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if duration < 100*time.Millisecond {
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duration = 100 * time.Millisecond
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}
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if duration >= time.Minute {
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timeout.LogFailure()
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} else {
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timeout.LogSuccess(duration)
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}
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}
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}
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func TestDynamicTimeoutAdjustExponential(t *testing.T) {
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timeout := newDynamicTimeout(time.Minute, time.Second)
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rand.Seed(time.Now().UTC().UnixNano())
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initial := timeout.Timeout()
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for try := 0; try < 10; try++ {
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testDynamicTimeoutAdjust(t, timeout, rand.ExpFloat64)
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}
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adjusted := timeout.Timeout()
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if initial <= adjusted {
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t.Errorf("Failure to decrease timeout, expected %v to be less than %v", adjusted, initial)
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}
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}
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func TestDynamicTimeoutAdjustNormalized(t *testing.T) {
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timeout := newDynamicTimeout(time.Minute, time.Second)
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rand.Seed(time.Now().UTC().UnixNano())
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initial := timeout.Timeout()
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for try := 0; try < 10; try++ {
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testDynamicTimeoutAdjust(t, timeout, func() float64 {
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return 1.0 + rand.NormFloat64()
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})
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}
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adjusted := timeout.Timeout()
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if initial <= adjusted {
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t.Errorf("Failure to decrease timeout, expected %v to be less than %v", adjusted, initial)
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}
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}
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