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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 bsoncore
import (
"bytes"
"encoding/binary"
"fmt"
"io"
"testing"
"github.com/google/go-cmp/cmp"
"go.mongodb.org/mongo-driver/bson/bsontype"
)
func ExampleDocument_Validate() {
doc := make(Document, 500)
doc[250], doc[251], doc[252], doc[253], doc[254] = 0x05, 0x00, 0x00, 0x00, 0x00
err := doc[250:].Validate()
fmt.Println(err)
// Output: <nil>
}
func BenchmarkDocumentValidate(b *testing.B) {
for i := 0; i < b.N; i++ {
doc := make(Document, 500)
doc[250], doc[251], doc[252], doc[253], doc[254] = 0x05, 0x00, 0x00, 0x00, 0x00
_ = doc[250:].Validate()
}
}
func TestDocument(t *testing.T) {
t.Run("Validate", func(t *testing.T) {
t.Run("TooShort", func(t *testing.T) {
want := NewInsufficientBytesError(nil, nil)
got := Document{'\x00', '\x00'}.Validate()
if !compareErrors(got, want) {
t.Errorf("Did not get expected error. got %v; want %v", got, want)
}
})
t.Run("InvalidLength", func(t *testing.T) {
want := NewDocumentLengthError(200, 5)
r := make(Document, 5)
binary.LittleEndian.PutUint32(r[0:4], 200)
got := r.Validate()
if !compareErrors(got, want) {
t.Errorf("Did not get expected error. got %v; want %v", got, want)
}
})
t.Run("Invalid Element", func(t *testing.T) {
want := NewInsufficientBytesError(nil, nil)
r := make(Document, 9)
binary.LittleEndian.PutUint32(r[0:4], 9)
r[4], r[5], r[6], r[7], r[8] = 0x02, 'f', 'o', 'o', 0x00
got := r.Validate()
if !compareErrors(got, want) {
t.Errorf("Did not get expected error. got %v; want %v", got, want)
}
})
t.Run("Missing Null Terminator", func(t *testing.T) {
want := ErrMissingNull
r := make(Document, 8)
binary.LittleEndian.PutUint32(r[0:4], 8)
r[4], r[5], r[6], r[7] = 0x0A, 'f', 'o', 'o'
got := r.Validate()
if !compareErrors(got, want) {
t.Errorf("Did not get expected error. got %v; want %v", got, want)
}
})
testCases := []struct {
name string
r Document
want error
}{
{"null", Document{'\x08', '\x00', '\x00', '\x00', '\x0A', 'x', '\x00', '\x00'}, nil},
{"subdocument",
Document{
'\x15', '\x00', '\x00', '\x00',
'\x03',
'f', 'o', 'o', '\x00',
'\x0B', '\x00', '\x00', '\x00', '\x0A', 'a', '\x00',
'\x0A', 'b', '\x00', '\x00', '\x00',
},
nil,
},
{"array",
Document{
'\x15', '\x00', '\x00', '\x00',
'\x04',
'f', 'o', 'o', '\x00',
'\x0B', '\x00', '\x00', '\x00', '\x0A', '1', '\x00',
'\x0A', '2', '\x00', '\x00', '\x00',
},
nil,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
got := tc.r.Validate()
if !compareErrors(got, tc.want) {
t.Errorf("Returned error does not match. got %v; want %v", got, tc.want)
}
})
}
})
t.Run("Lookup", func(t *testing.T) {
t.Run("empty-key", func(t *testing.T) {
rdr := Document{'\x05', '\x00', '\x00', '\x00', '\x00'}
_, err := rdr.LookupErr()
if err != ErrEmptyKey {
t.Errorf("Empty key lookup did not return expected result. got %v; want %v", err, ErrEmptyKey)
}
})
t.Run("corrupted-subdocument", func(t *testing.T) {
rdr := Document{
'\x0D', '\x00', '\x00', '\x00',
'\x03', 'x', '\x00',
'\x06', '\x00', '\x00', '\x00',
'\x01',
'\x00',
'\x00',
}
_, got := rdr.LookupErr("x", "y")
want := NewInsufficientBytesError(nil, nil)
if !cmp.Equal(got, want) {
t.Errorf("Empty key lookup did not return expected result. got %v; want %v", got, want)
}
})
t.Run("corrupted-array", func(t *testing.T) {
rdr := Document{
'\x0D', '\x00', '\x00', '\x00',
'\x04', 'x', '\x00',
'\x06', '\x00', '\x00', '\x00',
'\x01',
'\x00',
'\x00',
}
_, got := rdr.LookupErr("x", "y")
want := NewInsufficientBytesError(nil, nil)
if !cmp.Equal(got, want) {
t.Errorf("Empty key lookup did not return expected result. got %v; want %v", got, want)
}
})
t.Run("invalid-traversal", func(t *testing.T) {
rdr := Document{'\x08', '\x00', '\x00', '\x00', '\x0A', 'x', '\x00', '\x00'}
_, got := rdr.LookupErr("x", "y")
want := InvalidDepthTraversalError{Key: "x", Type: bsontype.Null}
if !compareErrors(got, want) {
t.Errorf("Empty key lookup did not return expected result. got %v; want %v", got, want)
}
})
testCases := []struct {
name string
r Document
key []string
want Value
err error
}{
{"first",
Document{
'\x08', '\x00', '\x00', '\x00', '\x0A', 'x', '\x00', '\x00',
},
[]string{"x"},
Value{Type: bsontype.Null, Data: []byte{}},
nil,
},
{"first-second",
Document{
'\x15', '\x00', '\x00', '\x00',
'\x03',
'f', 'o', 'o', '\x00',
'\x0B', '\x00', '\x00', '\x00', '\x0A', 'a', '\x00',
'\x0A', 'b', '\x00', '\x00', '\x00',
},
[]string{"foo", "b"},
Value{Type: bsontype.Null, Data: []byte{}},
nil,
},
{"first-second-array",
Document{
'\x15', '\x00', '\x00', '\x00',
'\x04',
'f', 'o', 'o', '\x00',
'\x0B', '\x00', '\x00', '\x00', '\x0A', '1', '\x00',
'\x0A', '2', '\x00', '\x00', '\x00',
},
[]string{"foo", "2"},
Value{Type: bsontype.Null, Data: []byte{}},
nil,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
t.Run("Lookup", func(t *testing.T) {
got := tc.r.Lookup(tc.key...)
if !cmp.Equal(got, tc.want) {
t.Errorf("Returned value does not match expected element. got %v; want %v", got, tc.want)
}
})
t.Run("LookupErr", func(t *testing.T) {
got, err := tc.r.LookupErr(tc.key...)
if err != tc.err {
t.Errorf("Returned error does not match. got %v; want %v", err, tc.err)
}
if !cmp.Equal(got, tc.want) {
t.Errorf("Returned value does not match expected element. got %v; want %v", got, tc.want)
}
})
})
}
})
t.Run("Index", func(t *testing.T) {
t.Run("Out of bounds", func(t *testing.T) {
rdr := Document{0xe, 0x0, 0x0, 0x0, 0xa, 0x78, 0x0, 0xa, 0x79, 0x0, 0xa, 0x7a, 0x0, 0x0}
_, err := rdr.IndexErr(3)
if err != ErrOutOfBounds {
t.Errorf("Out of bounds should be returned when accessing element beyond end of document. got %v; want %v", err, ErrOutOfBounds)
}
})
t.Run("Validation Error", func(t *testing.T) {
rdr := Document{0x07, 0x00, 0x00, 0x00, 0x00}
_, got := rdr.IndexErr(1)
want := NewInsufficientBytesError(nil, nil)
if !compareErrors(got, want) {
t.Errorf("Did not receive expected error. got %v; want %v", got, want)
}
})
testCases := []struct {
name string
rdr Document
index uint
want Element
}{
{"first",
Document{0xe, 0x0, 0x0, 0x0, 0xa, 0x78, 0x0, 0xa, 0x79, 0x0, 0xa, 0x7a, 0x0, 0x0},
0, Element{0x0a, 0x78, 0x00},
},
{"second",
Document{0xe, 0x0, 0x0, 0x0, 0xa, 0x78, 0x0, 0xa, 0x79, 0x0, 0xa, 0x7a, 0x0, 0x0},
1, Element{0x0a, 0x79, 0x00},
},
{"third",
Document{0xe, 0x0, 0x0, 0x0, 0xa, 0x78, 0x0, 0xa, 0x79, 0x0, 0xa, 0x7a, 0x0, 0x0},
2, Element{0x0a, 0x7a, 0x00},
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
t.Run("IndexErr", func(t *testing.T) {
got, err := tc.rdr.IndexErr(tc.index)
if err != nil {
t.Errorf("Unexpected error from IndexErr: %s", err)
}
if diff := cmp.Diff(got, tc.want); diff != "" {
t.Errorf("Documents differ: (-got +want)\n%s", diff)
}
})
t.Run("Index", func(t *testing.T) {
defer func() {
if err := recover(); err != nil {
t.Errorf("Unexpected error: %v", err)
}
}()
got := tc.rdr.Index(tc.index)
if diff := cmp.Diff(got, tc.want); diff != "" {
t.Errorf("Documents differ: (-got +want)\n%s", diff)
}
})
})
}
})
t.Run("NewDocumentFromReader", func(t *testing.T) {
testCases := []struct {
name string
ioReader io.Reader
doc Document
err error
}{
{
"nil reader",
nil,
nil,
ErrNilReader,
},
{
"premature end of reader",
bytes.NewBuffer([]byte{}),
nil,
io.EOF,
},
{
"empty document",
bytes.NewBuffer([]byte{5, 0, 0, 0, 0}),
[]byte{5, 0, 0, 0, 0},
nil,
},
{
"non-empty document",
bytes.NewBuffer([]byte{
// length
0x17, 0x0, 0x0, 0x0,
// type - string
0x2,
// key - "foo"
0x66, 0x6f, 0x6f, 0x0,
// value - string length
0x4, 0x0, 0x0, 0x0,
// value - string "bar"
0x62, 0x61, 0x72, 0x0,
// type - null
0xa,
// key - "baz"
0x62, 0x61, 0x7a, 0x0,
// null terminator
0x0,
}),
[]byte{
// length
0x17, 0x0, 0x0, 0x0,
// type - string
0x2,
// key - "foo"
0x66, 0x6f, 0x6f, 0x0,
// value - string length
0x4, 0x0, 0x0, 0x0,
// value - string "bar"
0x62, 0x61, 0x72, 0x0,
// type - null
0xa,
// key - "baz"
0x62, 0x61, 0x7a, 0x0,
// null terminator
0x0,
},
nil,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
doc, err := NewDocumentFromReader(tc.ioReader)
if !compareErrors(err, tc.err) {
t.Errorf("errors do not match. got %v; want %v", err, tc.err)
}
if !bytes.Equal(tc.doc, doc) {
t.Errorf("documents differ. got %v; want %v", tc.doc, doc)
}
})
}
})
t.Run("Elements", func(t *testing.T) {
invalidElem := BuildDocument(nil, AppendHeader(nil, bsontype.Double, "foo"))
invalidTwoElem := BuildDocument(nil,
AppendHeader(
AppendDoubleElement(nil, "pi", 3.14159),
bsontype.Double, "foo",
),
)
oneElem := BuildDocument(nil, AppendDoubleElement(nil, "pi", 3.14159))
twoElems := BuildDocument(nil,
AppendStringElement(
AppendDoubleElement(nil, "pi", 3.14159),
"hello", "world!",
),
)
testCases := []struct {
name string
doc Document
elems []Element
err error
}{
{"Insufficient Bytes Length", Document{0x03, 0x00, 0x00}, nil, NewInsufficientBytesError(nil, nil)},
{"Insufficient Bytes First Element", invalidElem, nil, NewInsufficientBytesError(nil, nil)},
{"Insufficient Bytes Second Element", invalidTwoElem, []Element{AppendDoubleElement(nil, "pi", 3.14159)}, NewInsufficientBytesError(nil, nil)},
{"Success One Element", oneElem, []Element{AppendDoubleElement(nil, "pi", 3.14159)}, nil},
{"Success Two Elements", twoElems, []Element{AppendDoubleElement(nil, "pi", 3.14159), AppendStringElement(nil, "hello", "world!")}, nil},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
elems, err := tc.doc.Elements()
if !compareErrors(err, tc.err) {
t.Errorf("errors do not match. got %v; want %v", err, tc.err)
}
if len(elems) != len(tc.elems) {
t.Fatalf("number of elements returned does not match. got %d; want %d", len(elems), len(tc.elems))
}
for idx := range elems {
got, want := elems[idx], tc.elems[idx]
if !bytes.Equal(got, want) {
t.Errorf("Elements at index %d differ. got %v; want %v", idx, got.DebugString(), want.DebugString())
}
}
})
}
})
}
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