453 lines
14 KiB
Go
453 lines
14 KiB
Go
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// Copyright (C) MongoDB, Inc. 2017-present.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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package bsoncodec
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import (
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"reflect"
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"testing"
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"github.com/google/go-cmp/cmp"
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"go.mongodb.org/mongo-driver/bson/bsonrw"
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"go.mongodb.org/mongo-driver/bson/bsontype"
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"go.mongodb.org/mongo-driver/internal/testutil/assert"
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)
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func TestRegistry(t *testing.T) {
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t.Run("Register", func(t *testing.T) {
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fc1, fc2, fc3, fc4 := new(fakeCodec), new(fakeCodec), new(fakeCodec), new(fakeCodec)
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t.Run("interface", func(t *testing.T) {
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var t1f *testInterface1
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var t2f *testInterface2
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var t4f *testInterface4
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ips := []interfaceValueEncoder{
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{i: reflect.TypeOf(t1f).Elem(), ve: fc1},
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{i: reflect.TypeOf(t2f).Elem(), ve: fc2},
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{i: reflect.TypeOf(t1f).Elem(), ve: fc3},
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{i: reflect.TypeOf(t4f).Elem(), ve: fc4},
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}
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want := []interfaceValueEncoder{
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{i: reflect.TypeOf(t1f).Elem(), ve: fc3},
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{i: reflect.TypeOf(t2f).Elem(), ve: fc2},
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{i: reflect.TypeOf(t4f).Elem(), ve: fc4},
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}
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rb := NewRegistryBuilder()
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for _, ip := range ips {
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rb.RegisterHookEncoder(ip.i, ip.ve)
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}
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got := rb.interfaceEncoders
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if !cmp.Equal(got, want, cmp.AllowUnexported(interfaceValueEncoder{}, fakeCodec{}), cmp.Comparer(typeComparer)) {
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t.Errorf("The registered interfaces are not correct. got %v; want %v", got, want)
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}
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})
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t.Run("type", func(t *testing.T) {
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ft1, ft2, ft4 := fakeType1{}, fakeType2{}, fakeType4{}
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rb := NewRegistryBuilder().
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RegisterTypeEncoder(reflect.TypeOf(ft1), fc1).
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RegisterTypeEncoder(reflect.TypeOf(ft2), fc2).
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RegisterTypeEncoder(reflect.TypeOf(ft1), fc3).
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RegisterTypeEncoder(reflect.TypeOf(ft4), fc4)
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want := []struct {
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t reflect.Type
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c ValueEncoder
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}{
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{reflect.TypeOf(ft1), fc3},
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{reflect.TypeOf(ft2), fc2},
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{reflect.TypeOf(ft4), fc4},
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}
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got := rb.typeEncoders
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for _, s := range want {
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wantT, wantC := s.t, s.c
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gotC, exists := got[wantT]
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if !exists {
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t.Errorf("Did not find type in the type registry: %v", wantT)
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}
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if !cmp.Equal(gotC, wantC, cmp.AllowUnexported(fakeCodec{})) {
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t.Errorf("Codecs did not match. got %#v; want %#v", gotC, wantC)
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}
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}
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})
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t.Run("kind", func(t *testing.T) {
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k1, k2, k4 := reflect.Struct, reflect.Slice, reflect.Map
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rb := NewRegistryBuilder().
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RegisterDefaultEncoder(k1, fc1).
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RegisterDefaultEncoder(k2, fc2).
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RegisterDefaultEncoder(k1, fc3).
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RegisterDefaultEncoder(k4, fc4)
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want := []struct {
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k reflect.Kind
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c ValueEncoder
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}{
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{k1, fc3},
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{k2, fc2},
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{k4, fc4},
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}
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got := rb.kindEncoders
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for _, s := range want {
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wantK, wantC := s.k, s.c
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gotC, exists := got[wantK]
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if !exists {
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t.Errorf("Did not find kind in the kind registry: %v", wantK)
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}
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if !cmp.Equal(gotC, wantC, cmp.AllowUnexported(fakeCodec{})) {
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t.Errorf("Codecs did not match. got %#v; want %#v", gotC, wantC)
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}
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}
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})
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t.Run("RegisterDefault", func(t *testing.T) {
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t.Run("MapCodec", func(t *testing.T) {
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codec := fakeCodec{num: 1}
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codec2 := fakeCodec{num: 2}
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rb := NewRegistryBuilder()
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rb.RegisterDefaultEncoder(reflect.Map, codec)
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if rb.kindEncoders[reflect.Map] != codec {
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t.Errorf("Did not properly set the map codec. got %v; want %v", rb.kindEncoders[reflect.Map], codec)
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}
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rb.RegisterDefaultEncoder(reflect.Map, codec2)
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if rb.kindEncoders[reflect.Map] != codec2 {
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t.Errorf("Did not properly set the map codec. got %v; want %v", rb.kindEncoders[reflect.Map], codec2)
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}
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})
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t.Run("StructCodec", func(t *testing.T) {
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codec := fakeCodec{num: 1}
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codec2 := fakeCodec{num: 2}
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rb := NewRegistryBuilder()
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rb.RegisterDefaultEncoder(reflect.Struct, codec)
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if rb.kindEncoders[reflect.Struct] != codec {
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t.Errorf("Did not properly set the struct codec. got %v; want %v", rb.kindEncoders[reflect.Struct], codec)
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}
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rb.RegisterDefaultEncoder(reflect.Struct, codec2)
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if rb.kindEncoders[reflect.Struct] != codec2 {
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t.Errorf("Did not properly set the struct codec. got %v; want %v", rb.kindEncoders[reflect.Struct], codec2)
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}
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})
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t.Run("SliceCodec", func(t *testing.T) {
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codec := fakeCodec{num: 1}
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codec2 := fakeCodec{num: 2}
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rb := NewRegistryBuilder()
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rb.RegisterDefaultEncoder(reflect.Slice, codec)
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if rb.kindEncoders[reflect.Slice] != codec {
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t.Errorf("Did not properly set the slice codec. got %v; want %v", rb.kindEncoders[reflect.Slice], codec)
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}
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rb.RegisterDefaultEncoder(reflect.Slice, codec2)
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if rb.kindEncoders[reflect.Slice] != codec2 {
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t.Errorf("Did not properly set the slice codec. got %v; want %v", rb.kindEncoders[reflect.Slice], codec2)
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}
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})
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t.Run("ArrayCodec", func(t *testing.T) {
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codec := fakeCodec{num: 1}
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codec2 := fakeCodec{num: 2}
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rb := NewRegistryBuilder()
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rb.RegisterDefaultEncoder(reflect.Array, codec)
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if rb.kindEncoders[reflect.Array] != codec {
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t.Errorf("Did not properly set the slice codec. got %v; want %v", rb.kindEncoders[reflect.Array], codec)
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}
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rb.RegisterDefaultEncoder(reflect.Array, codec2)
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if rb.kindEncoders[reflect.Array] != codec2 {
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t.Errorf("Did not properly set the slice codec. got %v; want %v", rb.kindEncoders[reflect.Array], codec2)
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}
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})
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})
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t.Run("Lookup", func(t *testing.T) {
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type Codec interface {
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ValueEncoder
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ValueDecoder
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}
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var arrinstance [12]int
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arr := reflect.TypeOf(arrinstance)
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slc := reflect.TypeOf(make([]int, 12))
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m := reflect.TypeOf(make(map[string]int))
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strct := reflect.TypeOf(struct{ Foo string }{})
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ft1 := reflect.PtrTo(reflect.TypeOf(fakeType1{}))
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ft2 := reflect.TypeOf(fakeType2{})
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ft3 := reflect.TypeOf(fakeType5(func(string, string) string { return "fakeType5" }))
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ti1 := reflect.TypeOf((*testInterface1)(nil)).Elem()
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ti2 := reflect.TypeOf((*testInterface2)(nil)).Elem()
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ti1Impl := reflect.TypeOf(testInterface1Impl{})
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ti2Impl := reflect.TypeOf(testInterface2Impl{})
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ti3 := reflect.TypeOf((*testInterface3)(nil)).Elem()
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ti3Impl := reflect.TypeOf(testInterface3Impl{})
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ti3ImplPtr := reflect.TypeOf((*testInterface3Impl)(nil))
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fc1, fc2 := fakeCodec{num: 1}, fakeCodec{num: 2}
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fsc, fslcc, fmc := new(fakeStructCodec), new(fakeSliceCodec), new(fakeMapCodec)
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pc := NewPointerCodec()
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reg := NewRegistryBuilder().
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RegisterTypeEncoder(ft1, fc1).
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RegisterTypeEncoder(ft2, fc2).
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RegisterTypeEncoder(ti1, fc1).
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RegisterDefaultEncoder(reflect.Struct, fsc).
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RegisterDefaultEncoder(reflect.Slice, fslcc).
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RegisterDefaultEncoder(reflect.Array, fslcc).
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RegisterDefaultEncoder(reflect.Map, fmc).
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RegisterDefaultEncoder(reflect.Ptr, pc).
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RegisterTypeDecoder(ft1, fc1).
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RegisterTypeDecoder(ft2, fc2).
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RegisterTypeDecoder(ti1, fc1). // values whose exact type is testInterface1 will use fc1 encoder
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RegisterDefaultDecoder(reflect.Struct, fsc).
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RegisterDefaultDecoder(reflect.Slice, fslcc).
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RegisterDefaultDecoder(reflect.Array, fslcc).
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RegisterDefaultDecoder(reflect.Map, fmc).
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RegisterDefaultDecoder(reflect.Ptr, pc).
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RegisterHookEncoder(ti2, fc2).
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RegisterHookDecoder(ti2, fc2).
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RegisterHookEncoder(ti3, fc3).
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RegisterHookDecoder(ti3, fc3).
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Build()
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testCases := []struct {
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name string
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t reflect.Type
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wantcodec Codec
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wanterr error
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testcache bool
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}{
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{
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"type registry (pointer)",
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ft1,
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fc1,
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nil,
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false,
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},
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{
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"type registry (non-pointer)",
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ft2,
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fc2,
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nil,
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false,
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},
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{
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// lookup an interface type and expect that the registered encoder is returned
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"interface with type encoder",
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ti1,
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fc1,
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nil,
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true,
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},
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{
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// lookup a type that implements an interface and expect that the default struct codec is returned
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"interface implementation with type encoder",
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ti1Impl,
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fsc,
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nil,
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false,
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},
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{
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// lookup an interface type and expect that the registered hook is returned
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"interface with hook",
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ti2,
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fc2,
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nil,
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false,
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},
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{
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// lookup a type that implements an interface and expect that the registered hook is returned
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"interface implementation with hook",
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ti2Impl,
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fc2,
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nil,
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false,
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},
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{
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// lookup a pointer to a type where the pointer implements an interface and expect that the
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// registered hook is returned
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"interface pointer to implementation with hook (pointer)",
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ti3ImplPtr,
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fc3,
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nil,
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false,
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},
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{
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"default struct codec (pointer)",
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reflect.PtrTo(strct),
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pc,
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nil,
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false,
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},
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{
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"default struct codec (non-pointer)",
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strct,
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fsc,
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nil,
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false,
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},
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{
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"default array codec",
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arr,
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fslcc,
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nil,
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false,
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},
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{
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"default slice codec",
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slc,
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fslcc,
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nil,
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false,
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},
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{
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"default map",
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m,
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fmc,
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nil,
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false,
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},
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{
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"map non-string key",
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reflect.TypeOf(map[int]int{}),
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fmc,
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nil,
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false,
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},
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{
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"No Codec Registered",
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ft3,
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nil,
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ErrNoEncoder{Type: ft3},
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false,
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},
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}
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allowunexported := cmp.AllowUnexported(fakeCodec{}, fakeStructCodec{}, fakeSliceCodec{}, fakeMapCodec{})
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comparepc := func(pc1, pc2 *PointerCodec) bool { return true }
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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t.Run("Encoder", func(t *testing.T) {
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gotcodec, goterr := reg.LookupEncoder(tc.t)
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if !cmp.Equal(goterr, tc.wanterr, cmp.Comparer(compareErrors)) {
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t.Errorf("Errors did not match. got %v; want %v", goterr, tc.wanterr)
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}
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if !cmp.Equal(gotcodec, tc.wantcodec, allowunexported, cmp.Comparer(comparepc)) {
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t.Errorf("Codecs did not match. got %v; want %v", gotcodec, tc.wantcodec)
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}
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})
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t.Run("Decoder", func(t *testing.T) {
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var wanterr error
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if ene, ok := tc.wanterr.(ErrNoEncoder); ok {
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wanterr = ErrNoDecoder(ene)
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} else {
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wanterr = tc.wanterr
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}
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gotcodec, goterr := reg.LookupDecoder(tc.t)
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if !cmp.Equal(goterr, wanterr, cmp.Comparer(compareErrors)) {
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t.Errorf("Errors did not match. got %v; want %v", goterr, wanterr)
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}
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if !cmp.Equal(gotcodec, tc.wantcodec, allowunexported, cmp.Comparer(comparepc)) {
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t.Errorf("Codecs did not match. got %v; want %v", gotcodec, tc.wantcodec)
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t.Errorf("Codecs did not match. got %T; want %T", gotcodec, tc.wantcodec)
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}
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})
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})
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}
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// lookup a type whose pointer implements an interface and expect that the registered hook is
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// returned
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t.Run("interface implementation with hook (pointer)", func(t *testing.T) {
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t.Run("Encoder", func(t *testing.T) {
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gotEnc, err := reg.LookupEncoder(ti3Impl)
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assert.Nil(t, err, "LookupEncoder error: %v", err)
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cae, ok := gotEnc.(*condAddrEncoder)
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assert.True(t, ok, "Expected CondAddrEncoder, got %T", gotEnc)
|
||
|
|
if !cmp.Equal(cae.canAddrEnc, fc3, allowunexported, cmp.Comparer(comparepc)) {
|
||
|
|
t.Errorf("expected canAddrEnc %v, got %v", cae.canAddrEnc, fc3)
|
||
|
|
}
|
||
|
|
if !cmp.Equal(cae.elseEnc, fsc, allowunexported, cmp.Comparer(comparepc)) {
|
||
|
|
t.Errorf("expected elseEnc %v, got %v", cae.elseEnc, fsc)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
t.Run("Decoder", func(t *testing.T) {
|
||
|
|
gotDec, err := reg.LookupDecoder(ti3Impl)
|
||
|
|
assert.Nil(t, err, "LookupDecoder error: %v", err)
|
||
|
|
|
||
|
|
cad, ok := gotDec.(*condAddrDecoder)
|
||
|
|
assert.True(t, ok, "Expected CondAddrDecoder, got %T", gotDec)
|
||
|
|
if !cmp.Equal(cad.canAddrDec, fc3, allowunexported, cmp.Comparer(comparepc)) {
|
||
|
|
t.Errorf("expected canAddrDec %v, got %v", cad.canAddrDec, fc3)
|
||
|
|
}
|
||
|
|
if !cmp.Equal(cad.elseDec, fsc, allowunexported, cmp.Comparer(comparepc)) {
|
||
|
|
t.Errorf("expected elseDec %v, got %v", cad.elseDec, fsc)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
})
|
||
|
|
})
|
||
|
|
})
|
||
|
|
t.Run("Type Map", func(t *testing.T) {
|
||
|
|
reg := NewRegistryBuilder().
|
||
|
|
RegisterTypeMapEntry(bsontype.String, reflect.TypeOf("")).
|
||
|
|
RegisterTypeMapEntry(bsontype.Int32, reflect.TypeOf(int(0))).
|
||
|
|
Build()
|
||
|
|
|
||
|
|
var got, want reflect.Type
|
||
|
|
|
||
|
|
want = reflect.TypeOf("")
|
||
|
|
got, err := reg.LookupTypeMapEntry(bsontype.String)
|
||
|
|
noerr(t, err)
|
||
|
|
if got != want {
|
||
|
|
t.Errorf("Did not get expected type. got %v; want %v", got, want)
|
||
|
|
}
|
||
|
|
|
||
|
|
want = reflect.TypeOf(int(0))
|
||
|
|
got, err = reg.LookupTypeMapEntry(bsontype.Int32)
|
||
|
|
noerr(t, err)
|
||
|
|
if got != want {
|
||
|
|
t.Errorf("Did not get expected type. got %v; want %v", got, want)
|
||
|
|
}
|
||
|
|
|
||
|
|
want = nil
|
||
|
|
wanterr := ErrNoTypeMapEntry{Type: bsontype.ObjectID}
|
||
|
|
got, err = reg.LookupTypeMapEntry(bsontype.ObjectID)
|
||
|
|
if err != wanterr {
|
||
|
|
t.Errorf("Did not get expected error. got %v; want %v", err, wanterr)
|
||
|
|
}
|
||
|
|
if got != want {
|
||
|
|
t.Errorf("Did not get expected type. got %v; want %v", got, want)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
type fakeType1 struct{}
|
||
|
|
type fakeType2 struct{}
|
||
|
|
type fakeType4 struct{}
|
||
|
|
type fakeType5 func(string, string) string
|
||
|
|
type fakeStructCodec struct{ fakeCodec }
|
||
|
|
type fakeSliceCodec struct{ fakeCodec }
|
||
|
|
type fakeMapCodec struct{ fakeCodec }
|
||
|
|
|
||
|
|
type fakeCodec struct{ num int }
|
||
|
|
|
||
|
|
func (fc fakeCodec) EncodeValue(EncodeContext, bsonrw.ValueWriter, reflect.Value) error {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
func (fc fakeCodec) DecodeValue(DecodeContext, bsonrw.ValueReader, reflect.Value) error {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
type testInterface1 interface{ test1() }
|
||
|
|
type testInterface2 interface{ test2() }
|
||
|
|
type testInterface3 interface{ test3() }
|
||
|
|
type testInterface4 interface{ test4() }
|
||
|
|
|
||
|
|
type testInterface1Impl struct{}
|
||
|
|
|
||
|
|
var _ testInterface1 = testInterface1Impl{}
|
||
|
|
|
||
|
|
func (testInterface1Impl) test1() {}
|
||
|
|
|
||
|
|
type testInterface2Impl struct{}
|
||
|
|
|
||
|
|
var _ testInterface2 = testInterface2Impl{}
|
||
|
|
|
||
|
|
func (testInterface2Impl) test2() {}
|
||
|
|
|
||
|
|
type testInterface3Impl struct{}
|
||
|
|
|
||
|
|
var _ testInterface3 = (*testInterface3Impl)(nil)
|
||
|
|
|
||
|
|
func (*testInterface3Impl) test3() {}
|
||
|
|
|
||
|
|
func typeComparer(i1, i2 reflect.Type) bool { return i1 == i2 }
|