github.com/blend/go-sdk@v1.20220411.3/async/future_test.go (about)

     1  /*
     2  
     3  Copyright (c) 2022 - Present. Blend Labs, Inc. All rights reserved
     4  Use of this source code is governed by a MIT license that can be found in the LICENSE file.
     5  
     6  */
     7  
     8  package async
     9  
    10  import (
    11  	"context"
    12  	"testing"
    13  
    14  	"github.com/blend/go-sdk/assert"
    15  )
    16  
    17  func Test_Future_Complete(t *testing.T) {
    18  	its := assert.New(t)
    19  
    20  	shouldComplete := make(chan struct{})
    21  	didComplete := make(chan struct{})
    22  	action := func(ctx context.Context) error {
    23  		select {
    24  		case <-ctx.Done():
    25  			return nil
    26  		case <-shouldComplete:
    27  			close(didComplete)
    28  			return nil
    29  		}
    30  	}
    31  
    32  	f := Await(context.TODO(), action)
    33  
    34  	close(shouldComplete)
    35  	<-didComplete
    36  
    37  	its.Nil(f.Complete())
    38  	its.Nil(f.Complete(), "repeat calls should just return")
    39  }
    40  
    41  func Test_Future_Cancel(t *testing.T) {
    42  	its := assert.New(t)
    43  
    44  	didCancel := make(chan struct{})
    45  	action := func(ctx context.Context) error {
    46  		<-ctx.Done()
    47  		close(didCancel)
    48  		return nil
    49  	}
    50  
    51  	its.Nil(Await(context.TODO(), action).Cancel())
    52  	<-didCancel
    53  }
    54  
    55  func Test_Future_Cancel_repeat(t *testing.T) {
    56  	its := assert.New(t)
    57  
    58  	didCancel := make(chan struct{})
    59  	action := func(ctx context.Context) error {
    60  		<-ctx.Done()
    61  		close(didCancel)
    62  		return nil
    63  	}
    64  
    65  	f := Await(context.TODO(), action)
    66  	its.Nil(f.Cancel())
    67  	<-didCancel
    68  
    69  	its.Equal(ErrCannotCancel, f.Cancel())
    70  }
    71  
    72  func Test_Future_Finished(t *testing.T) {
    73  	its := assert.New(t)
    74  
    75  	shouldComplete := make(chan struct{})
    76  	action := func(ctx context.Context) error {
    77  		select {
    78  		case <-ctx.Done():
    79  			return context.Canceled
    80  		case <-shouldComplete:
    81  			return nil
    82  		}
    83  	}
    84  
    85  	f := Await(context.TODO(), action)
    86  	close(shouldComplete)
    87  	its.Nil(<-f.Finished())
    88  }