You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: util_test.go
    path of file: ./repos/gitkube/vendor/k8s.io/client-go/util/retry
    
    the code of the file until where you have to start completion: /*
Copyright 2016 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is dis
    
func TestRetryOnConflict(t *testing.T) {
	opts := wait.Backoff{Factor: 1.0, Steps: 3}
	conflictErr := errors.NewConflict(schema.GroupResource{Resource: "test"}, "other", nil)

	// never returns
	err := RetryOnConflict(opts, func() error {
		return conflictErr
	})
	if err != conflictErr {
		t.Errorf("unexpected error: %v", err)
	}

	// returns immediately
	i := 0
	err = RetryOnConflict(opts, func() error {
		i++
		return nil
	})
	if err != nil || i != 1 {
		t.Errorf("unexpected error: %v", err)
	}

	// returns immediately on error
	testErr := fmt.Errorf("some other error")
	err = RetryOnConflict(opts, func() error {
		return testErr
	})
	if err != testErr {
		t.Errorf("unexpected error: %v", err)
	}

	// keeps retrying
	i = 0
	err = RetryOnConflict(opts, func() error {
		if i < 2 {
			i++
			return errors.NewConflict(schema.GroupResource{Resource: "test"}, "other", nil)
		}
		return nil
	})
	if err != nil || i != 2 {
		t.Errorf("unexpected error: %v", err)
	}
}