forked from mongodb/mongo-go-driver
/
mongo_test.go
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/
mongo_test.go
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// 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 (
"errors"
"fmt"
"testing"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/bsoncodec"
"go.mongodb.org/mongo-driver/bson/bsontype"
"go.mongodb.org/mongo-driver/bson/primitive"
"go.mongodb.org/mongo-driver/internal/testutil/assert"
"go.mongodb.org/mongo-driver/x/bsonx"
"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
)
func TestMongoHelpers(t *testing.T) {
t.Run("transform document", func(t *testing.T) {
testCases := []struct {
name string
document interface{}
want bsonx.Doc
err error
}{
{
"bson.Marshaler",
bMarsh{bsonx.Doc{{"foo", bsonx.String("bar")}}},
bsonx.Doc{{"foo", bsonx.String("bar")}},
nil,
},
{
"reflection",
reflectStruct{Foo: "bar"},
bsonx.Doc{{"foo", bsonx.String("bar")}},
nil,
},
{
"reflection pointer",
&reflectStruct{Foo: "bar"},
bsonx.Doc{{"foo", bsonx.String("bar")}},
nil,
},
{
"unsupported type",
[]string{"foo", "bar"},
nil,
MarshalError{
Value: []string{"foo", "bar"},
Err: errors.New("WriteArray can only write a Array while positioned on a Element or Value but is positioned on a TopLevel")},
},
{
"nil",
nil,
nil,
ErrNilDocument,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
got, err := transformDocument(bson.NewRegistryBuilder().Build(), tc.document)
assert.Equal(t, tc.err, err, "expected error %v, got %v", tc.err, err)
assert.Equal(t, tc.want, got, "expected document %v, got %v", tc.want, got)
})
}
})
t.Run("transform and ensure ID", func(t *testing.T) {
t.Run("newly added _id should be first element", func(t *testing.T) {
doc := bson.D{{"foo", "bar"}, {"baz", "qux"}, {"hello", "world"}}
want := bsonx.Doc{
{"_id", bsonx.Null()}, {"foo", bsonx.String("bar")},
{"baz", bsonx.String("qux")}, {"hello", bsonx.String("world")},
}
got, id, err := transformAndEnsureID(bson.DefaultRegistry, doc)
assert.Nil(t, err, "transformAndEnsureID error: %v", err)
oid, ok := id.(primitive.ObjectID)
assert.True(t, ok, "expected returned id type %T, got %T", primitive.ObjectID{}, id)
want[0] = bsonx.Elem{"_id", bsonx.ObjectID(oid)}
assert.Equal(t, got, want, "expected document %v, got %v", got, want)
})
t.Run("existing _id should be first element", func(t *testing.T) {
doc := bson.D{{"foo", "bar"}, {"baz", "qux"}, {"_id", 3.14159}, {"hello", "world"}}
want := bsonx.Doc{
{"_id", bsonx.Double(3.14159)}, {"foo", bsonx.String("bar")},
{"baz", bsonx.String("qux")}, {"hello", bsonx.String("world")},
}
got, id, err := transformAndEnsureID(bson.DefaultRegistry, doc)
assert.Nil(t, err, "transformAndEnsureID error: %v", err)
_, ok := id.(float64)
assert.True(t, ok, "expected returned id type %T, got %T", float64(0), id)
assert.Equal(t, got, want, "expected document %v, got %v", got, want)
})
t.Run("existing _id as first element should remain first element", func(t *testing.T) {
doc := bson.D{{"_id", 3.14159}, {"foo", "bar"}, {"baz", "qux"}, {"hello", "world"}}
want := bsonx.Doc{
{"_id", bsonx.Double(3.14159)}, {"foo", bsonx.String("bar")},
{"baz", bsonx.String("qux")}, {"hello", bsonx.String("world")},
}
got, id, err := transformAndEnsureID(bson.DefaultRegistry, doc)
assert.Nil(t, err, "transformAndEnsureID error: %v", err)
_, ok := id.(float64)
assert.True(t, ok, "expected returned id type %T, got %T", float64(0), id)
assert.Equal(t, got, want, "expected document %v, got %v", got, want)
})
t.Run("existing _id should not overwrite a first binary field", func(t *testing.T) {
doc := bson.D{{"bin", []byte{0, 0, 0}}, {"_id", "LongEnoughIdentifier"}}
want := bsonx.Doc{
{"_id", bsonx.String("LongEnoughIdentifier")},
{"bin", bsonx.Binary(0x00, []byte{0x00, 0x00, 0x00})},
}
got, id, err := transformAndEnsureID(bson.DefaultRegistry, doc)
assert.Nil(t, err, "transformAndEnsureID error: %v", err)
_, ok := id.(string)
assert.True(t, ok, "expected returned id type string, got %T", id)
assert.Equal(t, got, want, "expected document %v, got %v", got, want)
})
})
t.Run("transform aggregate pipeline", func(t *testing.T) {
index, arr := bsoncore.AppendArrayStart(nil)
dindex, arr := bsoncore.AppendDocumentElementStart(arr, "0")
arr = bsoncore.AppendInt32Element(arr, "$limit", 12345)
arr, _ = bsoncore.AppendDocumentEnd(arr, dindex)
arr, _ = bsoncore.AppendArrayEnd(arr, index)
testCases := []struct {
name string
pipeline interface{}
arr bsonx.Arr
err error
}{
{
"Pipeline/error",
Pipeline{{{"hello", func() {}}}}, bsonx.Arr{},
MarshalError{Value: primitive.D{}, Err: errors.New("no encoder found for func()")},
},
{
"Pipeline/success",
Pipeline{{{"hello", "world"}}, {{"pi", 3.14159}}},
bsonx.Arr{
bsonx.Document(bsonx.Doc{{"hello", bsonx.String("world")}}),
bsonx.Document(bsonx.Doc{{"pi", bsonx.Double(3.14159)}}),
},
nil,
},
{
"bsonx.Arr",
bsonx.Arr{bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int32(12345)}})},
bsonx.Arr{bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int32(12345)}})},
nil,
},
{
"[]bsonx.Doc",
[]bsonx.Doc{{{"$limit", bsonx.Int32(12345)}}},
bsonx.Arr{bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int32(12345)}})},
nil,
},
{
"primitive.A/error",
primitive.A{"5"},
bsonx.Arr{},
MarshalError{Value: string(""), Err: errors.New("WriteString can only write while positioned on a Element or Value but is positioned on a TopLevel")},
},
{
"primitive.A/success",
primitive.A{bson.D{{"$limit", int32(12345)}}, map[string]interface{}{"$count": "foobar"}},
bsonx.Arr{
bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int32(12345)}}),
bsonx.Document(bsonx.Doc{{"$count", bsonx.String("foobar")}}),
},
nil,
},
{
"bson.A/error",
bson.A{"5"},
bsonx.Arr{},
MarshalError{Value: string(""), Err: errors.New("WriteString can only write while positioned on a Element or Value but is positioned on a TopLevel")},
},
{
"bson.A/success",
bson.A{bson.D{{"$limit", int32(12345)}}, map[string]interface{}{"$count": "foobar"}},
bsonx.Arr{
bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int32(12345)}}),
bsonx.Document(bsonx.Doc{{"$count", bsonx.String("foobar")}}),
},
nil,
},
{
"[]interface{}/error",
[]interface{}{"5"},
bsonx.Arr{},
MarshalError{Value: string(""), Err: errors.New("WriteString can only write while positioned on a Element or Value but is positioned on a TopLevel")},
},
{
"[]interface{}/success",
[]interface{}{bson.D{{"$limit", int32(12345)}}, map[string]interface{}{"$count": "foobar"}},
bsonx.Arr{
bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int32(12345)}}),
bsonx.Document(bsonx.Doc{{"$count", bsonx.String("foobar")}}),
},
nil,
},
{
"bsoncodec.ValueMarshaler/MarshalBSONValue error",
bvMarsh{err: errors.New("MarshalBSONValue error")},
bsonx.Arr{},
errors.New("MarshalBSONValue error"),
},
{
"bsoncodec.ValueMarshaler/not array",
bvMarsh{t: bsontype.String},
bsonx.Arr{},
fmt.Errorf("ValueMarshaler returned a %v, but was expecting %v", bsontype.String, bsontype.Array),
},
{
"bsoncodec.ValueMarshaler/UnmarshalBSONValue error",
bvMarsh{t: bsontype.Array},
bsonx.Arr{},
bsoncore.NewInsufficientBytesError(nil, nil),
},
{
"bsoncodec.ValueMarshaler/success",
bvMarsh{t: bsontype.Array, data: arr},
bsonx.Arr{bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int32(12345)}})},
nil,
},
{
"nil",
nil,
bsonx.Arr{},
errors.New("can only transform slices and arrays into aggregation pipelines, but got invalid"),
},
{
"not array or slice",
int64(42),
bsonx.Arr{},
errors.New("can only transform slices and arrays into aggregation pipelines, but got int64"),
},
{
"array/error",
[1]interface{}{int64(42)},
bsonx.Arr{},
MarshalError{Value: int64(0), Err: errors.New("WriteInt64 can only write while positioned on a Element or Value but is positioned on a TopLevel")},
},
{
"array/success",
[1]interface{}{primitive.D{{"$limit", int64(12345)}}},
bsonx.Arr{bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int64(12345)}})},
nil,
},
{
"slice/error",
[]interface{}{int64(42)},
bsonx.Arr{},
MarshalError{Value: int64(0), Err: errors.New("WriteInt64 can only write while positioned on a Element or Value but is positioned on a TopLevel")},
},
{
"slice/success",
[]interface{}{primitive.D{{"$limit", int64(12345)}}},
bsonx.Arr{bsonx.Document(bsonx.Doc{{"$limit", bsonx.Int64(12345)}})},
nil,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
arr, err := transformAggregatePipeline(bson.NewRegistryBuilder().Build(), tc.pipeline)
assert.Equal(t, tc.err, err, "expected error %v, got %v", tc.err, err)
assert.Equal(t, tc.arr, arr, "expected array %v, got %v", tc.arr, arr)
})
}
})
}
var _ bson.Marshaler = bMarsh{}
type bMarsh struct {
bsonx.Doc
}
func (b bMarsh) MarshalBSON() ([]byte, error) {
return b.Doc.MarshalBSON()
}
type reflectStruct struct {
Foo string
}
var _ bsoncodec.ValueMarshaler = bvMarsh{}
type bvMarsh struct {
t bsontype.Type
data []byte
err error
}
func (b bvMarsh) MarshalBSONValue() (bsontype.Type, []byte, error) {
return b.t, b.data, b.err
}