trpc.group/trpc-go/trpc-go@v1.0.3/stream/flow_control_test.go (about)

     1  //
     2  //
     3  // Tencent is pleased to support the open source community by making tRPC available.
     4  //
     5  // Copyright (C) 2023 THL A29 Limited, a Tencent company.
     6  // All rights reserved.
     7  //
     8  // If you have downloaded a copy of the tRPC source code from Tencent,
     9  // please note that tRPC source code is licensed under the  Apache 2.0 License,
    10  // A copy of the Apache 2.0 License is included in this file.
    11  //
    12  //
    13  
    14  package stream
    15  
    16  import (
    17  	"errors"
    18  	"testing"
    19  	"time"
    20  
    21  	"github.com/stretchr/testify/assert"
    22  )
    23  
    24  // TestSendControl test flow control sender related implementation.
    25  func TestSendControl(t *testing.T) {
    26  	done := make(chan struct{})
    27  	sc := newSendControl(defaultInitWindowSize, done)
    28  	err := sc.GetWindow(100)
    29  	assert.Nil(t, err)
    30  
    31  	// Available window drops less than 0.
    32  	err = sc.GetWindow(uint32(defaultInitWindowSize - 99))
    33  	assert.Nil(t, err)
    34  
    35  	// block
    36  	t1 := time.Now()
    37  	go func() {
    38  		time.Sleep(500 * time.Millisecond)
    39  		sc.UpdateWindow(201)
    40  	}()
    41  	err = sc.GetWindow(200)
    42  	assert.Nil(t, err)
    43  	t2 := time.Since(t1)
    44  	assert.GreaterOrEqual(t, t2, 500*time.Millisecond)
    45  }
    46  
    47  // TestReceiveControl test.
    48  func TestReceiveControl(t *testing.T) {
    49  	fb := func(uint32) error {
    50  		return nil
    51  	}
    52  	rc := newReceiveControl(defaultInitWindowSize, fb)
    53  	err := rc.OnRecv(100)
    54  	assert.Nil(t, err)
    55  
    56  	// need to send updates.
    57  	err = rc.OnRecv(defaultInitWindowSize / 4)
    58  	assert.Nil(t, err)
    59  
    60  	// test for feedback errors.
    61  	fb = func(uint32) error {
    62  		return errors.New("feedback error")
    63  	}
    64  	err = rc.OnRecv(100)
    65  	assert.Nil(t, err)
    66  
    67  	rc = newReceiveControl(defaultInitWindowSize, fb)
    68  	err = rc.OnRecv(defaultInitWindowSize / 4)
    69  	assert.NotNil(t, err)
    70  }