util_test.go

Documentation: k8s.io/client-go/util/retry

     1  /*
     2  Copyright 2016 The Kubernetes 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 retry
    18  
    19  import (
    20  	"fmt"
    21  	"testing"
    22  
    23  	"k8s.io/apimachinery/pkg/api/errors"
    24  	"k8s.io/apimachinery/pkg/runtime/schema"
    25  	"k8s.io/apimachinery/pkg/util/wait"
    26  )
    27  
    28  func TestRetryOnConflict(t *testing.T) {
    29  	opts := wait.Backoff{Factor: 1.0, Steps: 3}
    30  	conflictErr := errors.NewConflict(schema.GroupResource{Resource: "test"}, "other", nil)
    31  
    32  	// never returns
    33  	err := RetryOnConflict(opts, func() error {
    34  		return conflictErr
    35  	})
    36  	if err != conflictErr {
    37  		t.Errorf("unexpected error: %v", err)
    38  	}
    39  
    40  	// returns immediately
    41  	i := 0
    42  	err = RetryOnConflict(opts, func() error {
    43  		i++
    44  		return nil
    45  	})
    46  	if err != nil || i != 1 {
    47  		t.Errorf("unexpected error: %v", err)
    48  	}
    49  
    50  	// returns immediately on error
    51  	testErr := fmt.Errorf("some other error")
    52  	err = RetryOnConflict(opts, func() error {
    53  		return testErr
    54  	})
    55  	if err != testErr {
    56  		t.Errorf("unexpected error: %v", err)
    57  	}
    58  
    59  	// keeps retrying
    60  	i = 0
    61  	err = RetryOnConflict(opts, func() error {
    62  		if i < 2 {
    63  			i++
    64  			return errors.NewConflict(schema.GroupResource{Resource: "test"}, "other", nil)
    65  		}
    66  		return nil
    67  	})
    68  	if err != nil || i != 2 {
    69  		t.Errorf("unexpected error: %v", err)
    70  	}
    71  }
    72
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