1// Copyright (c) 2016 Uber Technologies, Inc.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a copy
4// of this software and associated documentation files (the "Software"), to deal
5// in the Software without restriction, including without limitation the rights
6// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7// copies of the Software, and to permit persons to whom the Software is
8// furnished to do so, subject to the following conditions:
9//
10// The above copyright notice and this permission notice shall be included in
11// all copies or substantial portions of the Software.
12//
13// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19// THE SOFTWARE.
20
21package atomic
22
23import (
24	"errors"
25	"testing"
26
27	"github.com/stretchr/testify/require"
28)
29
30func TestErrorByValue(t *testing.T) {
31	err := &Error{}
32	require.Nil(t, err.Load(), "Initial value shall be nil")
33}
34
35func TestNewErrorWithNilArgument(t *testing.T) {
36	err := NewError(nil)
37	require.Nil(t, err.Load(), "Initial value shall be nil")
38}
39
40func TestErrorCanStoreNil(t *testing.T) {
41	err := NewError(errors.New("hello"))
42	err.Store(nil)
43	require.Nil(t, err.Load(), "Stored value shall be nil")
44}
45
46func TestNewErrorWithError(t *testing.T) {
47	err1 := errors.New("hello1")
48	err2 := errors.New("hello2")
49
50	atom := NewError(err1)
51	require.Equal(t, err1, atom.Load(), "Expected Load to return initialized value")
52
53	atom.Store(err2)
54	require.Equal(t, err2, atom.Load(), "Expected Load to return overridden value")
55}
56