/
gcs.go
135 lines (116 loc) · 3.45 KB
/
gcs.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
/*
* Copyright 2018- The Pixie 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 distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
*/
package testingutils
import (
"bytes"
"context"
"fmt"
"cloud.google.com/go/storage"
"github.com/googleapis/google-cloud-go-testing/storage/stiface"
)
// MockGCSClient is a mock of GCS's storage client.
type MockGCSClient struct {
stiface.Client
buckets map[string]*MockGCSBucket
}
// NewMockGCSClient creates a new mock client for GCS.
func NewMockGCSClient(buckets map[string]*MockGCSBucket) stiface.Client {
return &MockGCSClient{buckets: buckets}
}
// MockGCSBucket is a mock of a GCS storage bucket.
type MockGCSBucket struct {
attrs *storage.BucketAttrs
objects map[string]*MockGCSObject
}
// NewMockGCSBucket creates a new mock bucket for GCS.
func NewMockGCSBucket(objects map[string]*MockGCSObject, attrs *storage.BucketAttrs) *MockGCSBucket {
return &MockGCSBucket{
attrs: attrs,
objects: objects,
}
}
// MockGCSObject is a mock of a GCS object, storing contents and attrs.
type MockGCSObject struct {
contents []byte
attrs *storage.ObjectAttrs
}
// NewMockGCSObject creates a new mock GCS object.
func NewMockGCSObject(contents []byte, attrs *storage.ObjectAttrs) *MockGCSObject {
return &MockGCSObject{
contents: contents,
attrs: attrs,
}
}
// Bucket gets a mock gcs bucket.
func (c *MockGCSClient) Bucket(name string) stiface.BucketHandle {
return MockGCSBucketHandle{c: c, name: name}
}
// MockGCSBucketHandle is a mock of GCS storage client's BucketHandle.
type MockGCSBucketHandle struct {
stiface.BucketHandle
c *MockGCSClient
name string
}
// Object returns object handle from the given path.
func (b MockGCSBucketHandle) Object(name string) stiface.ObjectHandle {
return MockGCSObjectHandle{c: b.c, bucketName: b.name, name: name}
}
// MockGCSObjectHandle is a mock of GCS storage client's ObjectHandle.
type MockGCSObjectHandle struct {
stiface.ObjectHandle
c *MockGCSClient
bucketName string
name string
}
func (o MockGCSObjectHandle) getObj() (*MockGCSObject, error) {
bkt, ok := o.c.buckets[o.bucketName]
if !ok {
return nil, fmt.Errorf("bucket %q not found", o.bucketName)
}
obj, ok := bkt.objects[o.name]
if !ok {
return nil, fmt.Errorf("object %q not found in bucket %q", o.name, o.bucketName)
}
return obj, nil
}
// NewReader returns a new Reader for the object.
func (o MockGCSObjectHandle) NewReader(context.Context) (stiface.Reader, error) {
obj, err := o.getObj()
if err != nil {
return nil, err
}
return fakeReader{r: bytes.NewReader(obj.contents)}, nil
}
type fakeReader struct {
stiface.Reader
r *bytes.Reader
}
func (r fakeReader) Read(buf []byte) (int, error) {
return r.r.Read(buf)
}
func (r fakeReader) Close() error {
return nil
}
// Attrs returns a new Mocked attrs object.
func (o MockGCSObjectHandle) Attrs(context.Context) (*storage.ObjectAttrs, error) {
obj, err := o.getObj()
if err != nil {
return nil, err
}
return obj.attrs, nil
}