github.com/sacloud/iaas-api-go@v1.12.0/helper/query/wait_test.go (about)

     1  // Copyright 2016-2022 The sacloud/iaas-api-go Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package query
    16  
    17  import (
    18  	"context"
    19  	"errors"
    20  	"sync"
    21  	"testing"
    22  	"time"
    23  
    24  	"github.com/stretchr/testify/require"
    25  )
    26  
    27  type testChecker struct {
    28  	_called int
    29  	f       func(called int) (bool, error)
    30  	mu      sync.Mutex
    31  }
    32  
    33  func (c *testChecker) isExists() (bool, error) {
    34  	c.mu.Lock()
    35  	defer c.mu.Unlock()
    36  
    37  	c._called++
    38  	return c.f(c._called)
    39  }
    40  
    41  func (c *testChecker) called() int {
    42  	c.mu.Lock()
    43  	defer c.mu.Unlock()
    44  	return c._called
    45  }
    46  
    47  func TestWaitWhileReferenced_called(t *testing.T) {
    48  	checker := &testChecker{
    49  		f: func(called int) (bool, error) {
    50  			if called == 2 {
    51  				return false, nil
    52  			}
    53  			return true, nil
    54  		},
    55  	}
    56  	err := waitWhileReferenced(context.Background(), CheckReferencedOption{Tick: time.Millisecond, Timeout: time.Second}, checker.isExists)
    57  	if err != nil {
    58  		t.Error(err)
    59  	}
    60  
    61  	require.Equal(t, 2, checker.called())
    62  }
    63  
    64  func TestWaitWhileReferenced_contextCanceled(t *testing.T) {
    65  	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
    66  	defer cancel()
    67  
    68  	checker := &testChecker{
    69  		f: func(c int) (bool, error) {
    70  			return true, nil
    71  		},
    72  	}
    73  
    74  	err := waitWhileReferenced(ctx, CheckReferencedOption{Tick: time.Millisecond, Timeout: time.Second}, checker.isExists)
    75  	if err.Error() != "context deadline exceeded" {
    76  		t.Errorf("unexpected error: expected: %s, actual: %s", "context deadline exceeded", err)
    77  	}
    78  
    79  	if checker.called() < 2 {
    80  		t.Error("check func was not called when retry")
    81  	}
    82  }
    83  
    84  func TestWaitWhileReferenced_checkFuncReturnsError(t *testing.T) {
    85  	checker := &testChecker{
    86  		f: func(called int) (bool, error) {
    87  			if called == 2 {
    88  				return false, errors.New("dummy")
    89  			}
    90  			return true, nil
    91  		},
    92  	}
    93  
    94  	err := waitWhileReferenced(context.Background(), CheckReferencedOption{Tick: time.Millisecond, Timeout: time.Second}, checker.isExists)
    95  	require.Equal(t, errors.New("dummy"), err)
    96  	require.Equal(t, 2, checker.called())
    97  }
    98  
    99  func TestWaitWhileReferenced_optionTimeout(t *testing.T) {
   100  	checker := &testChecker{
   101  		f: func(called int) (bool, error) {
   102  			return true, nil
   103  		},
   104  	}
   105  
   106  	err := waitWhileReferenced(context.Background(), CheckReferencedOption{Tick: time.Millisecond, Timeout: 10 * time.Millisecond}, checker.isExists)
   107  	if err.Error() != "context deadline exceeded" {
   108  		t.Errorf("unexpected error: expected: %s, actual: %s", "context deadline exceeded", err)
   109  	}
   110  
   111  	if checker.called() < 2 {
   112  		t.Error("check func was not called when retry")
   113  	}
   114  }