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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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
package mongo
import (
"context"
"testing"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/internal/testutil/assert"
"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
"go.mongodb.org/mongo-driver/x/mongo/driver"
)
type testBatchCursor struct {
batches []*bsoncore.DocumentSequence
batch *bsoncore.DocumentSequence
closed bool
}
func newTestBatchCursor(numBatches, batchSize int) *testBatchCursor {
batches := make([]*bsoncore.DocumentSequence, 0, numBatches)
counter := 0
for batch := 0; batch < numBatches; batch++ {
var docSequence []byte
for doc := 0; doc < batchSize; doc++ {
var elem []byte
elem = bsoncore.AppendInt32Element(elem, "foo", int32(counter))
counter++
var doc []byte
doc = bsoncore.BuildDocumentFromElements(doc, elem)
docSequence = append(docSequence, doc...)
}
batches = append(batches, &bsoncore.DocumentSequence{
Style: bsoncore.SequenceStyle,
Data: docSequence,
})
}
return &testBatchCursor{
batches: batches,
}
}
func (tbc *testBatchCursor) ID() int64 {
if len(tbc.batches) == 0 {
return 0 // cursor exhausted
}
return 10
}
func (tbc *testBatchCursor) Next(context.Context) bool {
if len(tbc.batches) == 0 {
return false
}
tbc.batch = tbc.batches[0]
tbc.batches = tbc.batches[1:]
return true
}
func (tbc *testBatchCursor) Batch() *bsoncore.DocumentSequence {
return tbc.batch
}
func (tbc *testBatchCursor) Server() driver.Server {
return nil
}
func (tbc *testBatchCursor) Err() error {
return nil
}
func (tbc *testBatchCursor) Close(context.Context) error {
tbc.closed = true
return nil
}
func TestCursor(t *testing.T) {
t.Run("loops until docs available", func(t *testing.T) {})
t.Run("returns false on context cancellation", func(t *testing.T) {})
t.Run("returns false if error occurred", func(t *testing.T) {})
t.Run("returns false if ID is zero and no more docs", func(t *testing.T) {})
t.Run("TestAll", func(t *testing.T) {
t.Run("errors if argument is not pointer to slice", func(t *testing.T) {
cursor, err := newCursor(newTestBatchCursor(1, 5), nil)
assert.Nil(t, err, "newCursor error: %v", err)
err = cursor.All(context.Background(), []bson.D{})
assert.NotNil(t, err, "expected error, got nil")
})
t.Run("fills slice with all documents", func(t *testing.T) {
cursor, err := newCursor(newTestBatchCursor(1, 5), nil)
assert.Nil(t, err, "newCursor error: %v", err)
var docs []bson.D
err = cursor.All(context.Background(), &docs)
assert.Nil(t, err, "All error: %v", err)
assert.Equal(t, 5, len(docs), "expected 5 docs, got %v", len(docs))
for index, doc := range docs {
expected := bson.D{{"foo", int32(index)}}
assert.Equal(t, expected, doc, "expected doc %v, got %v", expected, doc)
}
})
t.Run("decodes each document into slice type", func(t *testing.T) {
cursor, err := newCursor(newTestBatchCursor(1, 5), nil)
assert.Nil(t, err, "newCursor error: %v", err)
type Document struct {
Foo int32 `bson:"foo"`
}
var docs []Document
err = cursor.All(context.Background(), &docs)
assert.Nil(t, err, "All error: %v", err)
assert.Equal(t, 5, len(docs), "expected 5 documents, got %v", len(docs))
for index, doc := range docs {
expected := Document{Foo: int32(index)}
assert.Equal(t, expected, doc, "expected doc %v, got %v", expected, doc)
}
})
t.Run("multiple batches are included", func(t *testing.T) {
cursor, err := newCursor(newTestBatchCursor(2, 5), nil)
assert.Nil(t, err, "newCursor error: %v", err)
var docs []bson.D
err = cursor.All(context.Background(), &docs)
assert.Nil(t, err, "All error: %v", err)
assert.Equal(t, 10, len(docs), "expected 10 docs, got %v", len(docs))
for index, doc := range docs {
expected := bson.D{{"foo", int32(index)}}
assert.Equal(t, expected, doc, "expected doc %v, got %v", expected, doc)
}
})
t.Run("cursor is closed after All is called", func(t *testing.T) {
var docs []bson.D
tbc := newTestBatchCursor(1, 5)
cursor, err := newCursor(tbc, nil)
assert.Nil(t, err, "newCursor error: %v", err)
err = cursor.All(context.Background(), &docs)
assert.Nil(t, err, "All error: %v", err)
assert.True(t, tbc.closed, "expected batch cursor to be closed but was not")
})
t.Run("does not error given interface as parameter", func(t *testing.T) {
var docs interface{} = []bson.D{}
cursor, err := newCursor(newTestBatchCursor(1, 5), nil)
assert.Nil(t, err, "newCursor error: %v", err)
err = cursor.All(context.Background(), &docs)
assert.Nil(t, err, "expected Nil, got error: %v", err)
assert.Equal(t, 5, len(docs.([]bson.D)), "expected 5 documents, got %v", len(docs.([]bson.D)))
})
t.Run("errors when not given pointer to slice", func(t *testing.T) {
var docs interface{} = "test"
cursor, err := newCursor(newTestBatchCursor(1, 5), nil)
assert.Nil(t, err, "newCursor error: %v", err)
err = cursor.All(context.Background(), &docs)
assert.NotNil(t, err, "expected error, got: %v", err)
})
})
}
|
