github.com/cloudwego/kitex@v0.9.0/pkg/remote/trans/nphttp2/grpc/flowcontrol_test.go (about)

     1  /*
     2   * Copyright 2022 CloudWeGo Authors
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package grpc
    18  
    19  import (
    20  	"math"
    21  	"testing"
    22  	"time"
    23  
    24  	"github.com/cloudwego/kitex/internal/test"
    25  )
    26  
    27  func TestWriteQuota(t *testing.T) {
    28  	// init
    29  	quotaLimit := int32(100)
    30  	done := make(chan struct{})
    31  
    32  	// test newWriteQuota()
    33  	wq := newWriteQuota(quotaLimit, done)
    34  
    35  	// test get() and less than quotaLimit
    36  	err := wq.get(80)
    37  	test.Assert(t, err == nil, err)
    38  
    39  	// test realReplenish() to refresh quotaLimit
    40  	wq.realReplenish(80)
    41  	test.Assert(t, wq.quota == quotaLimit)
    42  
    43  	// test get() in block situation
    44  	go func() {
    45  		time.Sleep(time.Millisecond * 50)
    46  		wq.replenish(40)
    47  	}()
    48  	err = wq.get(120)
    49  	test.Assert(t, err == nil, err)
    50  
    51  	// test get() after block and replenish
    52  	err = wq.get(20)
    53  	test.Assert(t, err == nil, err)
    54  
    55  	// test stop writeQuota by channel
    56  	go func() {
    57  		time.Sleep(time.Millisecond * 50)
    58  		var s struct{}
    59  		done <- s
    60  	}()
    61  	err = wq.get(20)
    62  	test.Assert(t, err == errStreamDone)
    63  }
    64  
    65  func TestTrInFlow(t *testing.T) {
    66  	// init
    67  	oldLimit := uint32(100)
    68  	trInFlow := &trInFlow{limit: oldLimit}
    69  	limit := 2 * oldLimit
    70  
    71  	// test newLimit()
    72  	delta := trInFlow.newLimit(limit)
    73  	test.Assert(t, delta == oldLimit)
    74  
    75  	// test onData() but unacked is less than 1/4 limit
    76  	increase := trInFlow.onData(limit / 10)
    77  	test.Assert(t, increase == 0)
    78  
    79  	// test onData() and unacked is more than 1/4 limit
    80  	increase = trInFlow.onData(limit / 2)
    81  	test.Assert(t, increase == limit/2+limit/10)
    82  
    83  	// test reset()
    84  	increase = trInFlow.onData(limit / 5)
    85  	test.Assert(t, increase == 0)
    86  	increase = trInFlow.reset()
    87  	test.Assert(t, increase == limit/5)
    88  }
    89  
    90  func TestInFlow(t *testing.T) {
    91  	// init
    92  	oldLimit := uint32(100)
    93  	inFlow := &inFlow{limit: oldLimit}
    94  	limit := oldLimit * 2
    95  
    96  	// test newLimit()
    97  	inFlow.newLimit(limit)
    98  	test.Assert(t, inFlow.limit == limit)
    99  
   100  	// test empty onData()
   101  	err := inFlow.onData(0)
   102  	test.Assert(t, err == nil, err)
   103  
   104  	// test empty onRead()
   105  	increase := inFlow.onRead(0)
   106  	test.Assert(t, increase == 0)
   107  
   108  	// test onData()
   109  	err = inFlow.onData(limit)
   110  	test.Assert(t, err == nil, err)
   111  
   112  	// test onRead()
   113  	size := inFlow.onRead(limit)
   114  	test.Assert(t, size == limit)
   115  
   116  	// test onData() illegal situation
   117  	err = inFlow.onData(limit * 2)
   118  	test.Assert(t, err != nil)
   119  
   120  	// test maybeAdjust() no adjust
   121  	adjustNum := inFlow.maybeAdjust(0)
   122  	test.Assert(t, adjustNum == 0)
   123  
   124  	// test maybeAdjust() do adjust
   125  	adjustNum = inFlow.maybeAdjust(limit * 2)
   126  	test.Assert(t, adjustNum == limit*2)
   127  
   128  	// test maybeAdjust() maxSize adjust (f.delta - limit)
   129  	adjustNum = inFlow.maybeAdjust(math.MaxInt32 + 1)
   130  	test.Assert(t, adjustNum == math.MaxInt32-limit)
   131  }