/
resource_with_custom_diff.go
154 lines (138 loc) · 3.4 KB
/
resource_with_custom_diff.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
package test
import (
"fmt"
"github.com/hashicorp/terraform/helper/schema"
)
func testResourceCustomDiff() *schema.Resource {
return &schema.Resource{
Create: testResourceCustomDiffCreate,
Read: testResourceCustomDiffRead,
CustomizeDiff: testResourceCustomDiffCustomizeDiff,
Update: testResourceCustomDiffUpdate,
Delete: testResourceCustomDiffDelete,
Schema: map[string]*schema.Schema{
"required": {
Type: schema.TypeString,
Required: true,
},
"computed": {
Type: schema.TypeInt,
Computed: true,
},
"index": {
Type: schema.TypeInt,
Computed: true,
},
"veto": {
Type: schema.TypeBool,
Optional: true,
},
"list": {
Type: schema.TypeList,
Computed: true,
Elem: &schema.Schema{Type: schema.TypeString},
},
},
}
}
type listDiffCases struct {
Type string
Value string
}
func testListDiffCases(index int) []listDiffCases {
switch index {
case 0:
return []listDiffCases{
{
Type: "add",
Value: "dc1",
},
}
case 1:
return []listDiffCases{
{
Type: "remove",
Value: "dc1",
},
{
Type: "add",
Value: "dc2",
},
{
Type: "add",
Value: "dc3",
},
}
}
return nil
}
func testListDiffCasesReadResult(index int) []interface{} {
switch index {
case 1:
return []interface{}{"dc1"}
default:
return []interface{}{"dc2", "dc3"}
}
}
func testResourceCustomDiffCreate(d *schema.ResourceData, meta interface{}) error {
d.SetId("testId")
// Required must make it through to Create
if _, ok := d.GetOk("required"); !ok {
return fmt.Errorf("missing attribute 'required', but it's required")
}
_, new := d.GetChange("computed")
expected := new.(int) - 1
actual := d.Get("index").(int)
if expected != actual {
return fmt.Errorf("expected computed to be 1 ahead of index, got computed: %d, index: %d", expected, actual)
}
d.Set("index", new)
return testResourceCustomDiffRead(d, meta)
}
func testResourceCustomDiffRead(d *schema.ResourceData, meta interface{}) error {
if err := d.Set("list", testListDiffCasesReadResult(d.Get("index").(int))); err != nil {
return err
}
return nil
}
func testResourceCustomDiffCustomizeDiff(d *schema.ResourceDiff, meta interface{}) error {
if d.Get("veto").(bool) == true {
return fmt.Errorf("veto is true, diff vetoed")
}
// Note that this gets put into state after the update, regardless of whether
// or not anything is acted upon in the diff.
d.SetNew("computed", d.Get("computed").(int)+1)
// This tests a diffed list, based off of the value of index
dcs := testListDiffCases(d.Get("index").(int))
s := d.Get("list").([]interface{})
for _, dc := range dcs {
switch dc.Type {
case "add":
s = append(s, dc.Value)
case "remove":
for i := range s {
if s[i].(string) == dc.Value {
copy(s[i:], s[i+1:])
s = s[:len(s)-1]
break
}
}
}
}
d.SetNew("list", s)
return nil
}
func testResourceCustomDiffUpdate(d *schema.ResourceData, meta interface{}) error {
_, new := d.GetChange("computed")
expected := new.(int) - 1
actual := d.Get("index").(int)
if expected != actual {
return fmt.Errorf("expected computed to be 1 ahead of index, got computed: %d, index: %d", expected, actual)
}
d.Set("index", new)
return testResourceCustomDiffRead(d, meta)
}
func testResourceCustomDiffDelete(d *schema.ResourceData, meta interface{}) error {
d.SetId("")
return nil
}