578 lines
17 KiB
Go
578 lines
17 KiB
Go
// 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 bson
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import (
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"errors"
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"reflect"
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"testing"
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"gitea.psichedelico.com/go/bson/internal/assert"
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"github.com/google/go-cmp/cmp"
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)
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// newTestRegistry creates a new Registry.
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func newTestRegistry() *Registry {
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return &Registry{
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typeEncoders: new(typeEncoderCache),
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typeDecoders: new(typeDecoderCache),
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kindEncoders: new(kindEncoderCache),
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kindDecoders: new(kindDecoderCache),
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}
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}
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func TestRegistry(t *testing.T) {
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t.Parallel()
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t.Run("Register", func(t *testing.T) {
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t.Parallel()
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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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t.Parallel()
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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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reg := newTestRegistry()
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for _, ip := range ips {
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reg.RegisterInterfaceEncoder(ip.i, ip.ve)
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}
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got := reg.interfaceEncoders
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if !cmp.Equal(got, want, cmp.AllowUnexported(interfaceValueEncoder{}, fakeCodec{}), cmp.Comparer(typeComparer)) {
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t.Errorf("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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t.Parallel()
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ft1, ft2, ft4 := fakeType1{}, fakeType2{}, fakeType4{}
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reg := newTestRegistry()
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reg.RegisterTypeEncoder(reflect.TypeOf(ft1), fc1)
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reg.RegisterTypeEncoder(reflect.TypeOf(ft2), fc2)
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reg.RegisterTypeEncoder(reflect.TypeOf(ft1), fc3)
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reg.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 := reg.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.Load(wantT)
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if !exists {
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t.Errorf("type missing in 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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t.Parallel()
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k1, k2, k4 := reflect.Struct, reflect.Slice, reflect.Map
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reg := newTestRegistry()
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reg.RegisterKindEncoder(k1, fc1)
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reg.RegisterKindEncoder(k2, fc2)
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reg.RegisterKindEncoder(k1, fc3)
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reg.RegisterKindEncoder(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 := reg.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.Load(wantK)
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if !exists {
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t.Errorf("type missing in 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.Parallel()
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t.Run("MapCodec", func(t *testing.T) {
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t.Parallel()
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codec := &fakeCodec{num: 1}
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codec2 := &fakeCodec{num: 2}
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reg := newTestRegistry()
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reg.RegisterKindEncoder(reflect.Map, codec)
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if reg.kindEncoders.get(reflect.Map) != codec {
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t.Errorf("map codec not properly set: got %#v, want %#v", reg.kindEncoders.get(reflect.Map), codec)
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}
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reg.RegisterKindEncoder(reflect.Map, codec2)
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if reg.kindEncoders.get(reflect.Map) != codec2 {
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t.Errorf("map codec properly set: got %#v, want %#v", reg.kindEncoders.get(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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t.Parallel()
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codec := &fakeCodec{num: 1}
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codec2 := &fakeCodec{num: 2}
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reg := newTestRegistry()
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reg.RegisterKindEncoder(reflect.Struct, codec)
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if reg.kindEncoders.get(reflect.Struct) != codec {
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t.Errorf("struct codec not properly set: got %#v, want %#v", reg.kindEncoders.get(reflect.Struct), codec)
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}
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reg.RegisterKindEncoder(reflect.Struct, codec2)
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if reg.kindEncoders.get(reflect.Struct) != codec2 {
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t.Errorf("struct codec not properly set: got %#v, want %#v", reg.kindEncoders.get(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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t.Parallel()
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codec := &fakeCodec{num: 1}
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codec2 := &fakeCodec{num: 2}
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reg := newTestRegistry()
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reg.RegisterKindEncoder(reflect.Slice, codec)
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if reg.kindEncoders.get(reflect.Slice) != codec {
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t.Errorf("slice codec not properly set: got %#v, want %#v", reg.kindEncoders.get(reflect.Slice), codec)
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}
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reg.RegisterKindEncoder(reflect.Slice, codec2)
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if reg.kindEncoders.get(reflect.Slice) != codec2 {
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t.Errorf("slice codec not properly set: got %#v, want %#v", reg.kindEncoders.get(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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t.Parallel()
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codec := &fakeCodec{num: 1}
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codec2 := &fakeCodec{num: 2}
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reg := newTestRegistry()
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reg.RegisterKindEncoder(reflect.Array, codec)
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if reg.kindEncoders.get(reflect.Array) != codec {
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t.Errorf("slice codec not properly set: got %#v, want %#v", reg.kindEncoders.get(reflect.Array), codec)
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}
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reg.RegisterKindEncoder(reflect.Array, codec2)
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if reg.kindEncoders.get(reflect.Array) != codec2 {
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t.Errorf("slice codec not properly set: got %#v, want %#v", reg.kindEncoders.get(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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t.Parallel()
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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 (
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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 = &pointerCodec{}
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)
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reg := newTestRegistry()
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reg.RegisterTypeEncoder(ft1, fc1)
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reg.RegisterTypeEncoder(ft2, fc2)
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reg.RegisterTypeEncoder(ti1, fc1)
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reg.RegisterKindEncoder(reflect.Struct, fsc)
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reg.RegisterKindEncoder(reflect.Slice, fslcc)
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reg.RegisterKindEncoder(reflect.Array, fslcc)
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reg.RegisterKindEncoder(reflect.Map, fmc)
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reg.RegisterKindEncoder(reflect.Ptr, pc)
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reg.RegisterTypeDecoder(ft1, fc1)
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reg.RegisterTypeDecoder(ft2, fc2)
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reg.RegisterTypeDecoder(ti1, fc1) // values whose exact type is testInterface1 will use fc1 encoder
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reg.RegisterKindDecoder(reflect.Struct, fsc)
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reg.RegisterKindDecoder(reflect.Slice, fslcc)
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reg.RegisterKindDecoder(reflect.Array, fslcc)
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reg.RegisterKindDecoder(reflect.Map, fmc)
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reg.RegisterKindDecoder(reflect.Ptr, pc)
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reg.RegisterInterfaceEncoder(ti2, fc2)
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reg.RegisterInterfaceDecoder(ti2, fc2)
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reg.RegisterInterfaceEncoder(ti3, fc3)
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reg.RegisterInterfaceDecoder(ti3, fc3)
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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 pc1 == pc2 }
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for _, tc := range testCases {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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t.Run("Encoder", func(t *testing.T) {
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t.Parallel()
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gotcodec, goterr := reg.LookupEncoder(tc.t)
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if !cmp.Equal(goterr, tc.wanterr, cmp.Comparer(assert.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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t.Parallel()
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wanterr := tc.wanterr
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if ene, ok := tc.wanterr.(errNoEncoder); ok {
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wanterr = errNoDecoder(ene)
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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(assert.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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}
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})
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})
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}
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t.Run("nil type", func(t *testing.T) {
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t.Parallel()
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t.Run("Encoder", func(t *testing.T) {
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t.Parallel()
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wanterr := errNoEncoder{Type: reflect.TypeOf(nil)}
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gotcodec, goterr := reg.LookupEncoder(nil)
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if !cmp.Equal(goterr, wanterr, cmp.Comparer(assert.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, nil, allowunexported, cmp.Comparer(comparepc)) {
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t.Errorf("codecs did not match: got %#v, want nil", gotcodec)
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}
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})
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t.Run("Decoder", func(t *testing.T) {
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t.Parallel()
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wanterr := "cannot perform a decoder lookup on <nil>"
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gotcodec, goterr := reg.LookupDecoder(nil)
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assert.EqualError(t, goterr, wanterr, "errors did not match")
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if !cmp.Equal(gotcodec, nil, allowunexported, cmp.Comparer(comparepc)) {
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t.Errorf("codecs did not match: got %v: want nil", gotcodec)
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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.Parallel()
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t.Run("Encoder", func(t *testing.T) {
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t.Parallel()
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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)
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if !cmp.Equal(cae.canAddrEnc, fc3, allowunexported, cmp.Comparer(comparepc)) {
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t.Errorf("expected canAddrEnc %#v, got %#v", cae.canAddrEnc, fc3)
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}
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if !cmp.Equal(cae.elseEnc, fsc, allowunexported, cmp.Comparer(comparepc)) {
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t.Errorf("expected elseEnc %#v, got %#v", cae.elseEnc, fsc)
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}
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})
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t.Run("Decoder", func(t *testing.T) {
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t.Parallel()
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gotDec, err := reg.LookupDecoder(ti3Impl)
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assert.Nil(t, err, "LookupDecoder error: %v", err)
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cad, ok := gotDec.(*condAddrDecoder)
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assert.True(t, ok, "Expected CondAddrDecoder, got %T", gotDec)
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if !cmp.Equal(cad.canAddrDec, fc3, allowunexported, cmp.Comparer(comparepc)) {
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t.Errorf("expected canAddrDec %#v, got %#v", cad.canAddrDec, fc3)
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}
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if !cmp.Equal(cad.elseDec, fsc, allowunexported, cmp.Comparer(comparepc)) {
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t.Errorf("expected elseDec %#v, got %#v", cad.elseDec, fsc)
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}
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})
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})
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})
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})
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t.Run("Type Map", func(t *testing.T) {
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t.Parallel()
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reg := newTestRegistry()
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reg.RegisterTypeMapEntry(TypeString, reflect.TypeOf(""))
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reg.RegisterTypeMapEntry(TypeInt32, reflect.TypeOf(int(0)))
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var got, want reflect.Type
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want = reflect.TypeOf("")
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got, err := reg.LookupTypeMapEntry(TypeString)
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noerr(t, err)
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if got != want {
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t.Errorf("unexpected type: got %#v, want %#v", got, want)
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}
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want = reflect.TypeOf(int(0))
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got, err = reg.LookupTypeMapEntry(TypeInt32)
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noerr(t, err)
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if got != want {
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t.Errorf("unexpected type: got %#v, want %#v", got, want)
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}
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want = nil
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wanterr := errNoTypeMapEntry{Type: TypeObjectID}
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got, err = reg.LookupTypeMapEntry(TypeObjectID)
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if !errors.Is(err, wanterr) {
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t.Errorf("unexpected error: got %#v, want %#v", err, wanterr)
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}
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if got != want {
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t.Errorf("unexpected error: got %#v, want %#v", got, want)
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}
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})
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}
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// get is only for testing as it does return if the value was found
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func (c *kindEncoderCache) get(rt reflect.Kind) ValueEncoder {
|
|
e, _ := c.Load(rt)
|
|
return e
|
|
}
|
|
|
|
func BenchmarkLookupEncoder(b *testing.B) {
|
|
type childStruct struct {
|
|
V1, V2, V3, V4 int
|
|
}
|
|
type nestedStruct struct {
|
|
childStruct
|
|
A struct{ C1, C2, C3, C4 childStruct }
|
|
B struct{ C1, C2, C3, C4 childStruct }
|
|
C struct{ M1, M2, M3, M4 map[int]int }
|
|
}
|
|
types := [...]reflect.Type{
|
|
reflect.TypeOf(int64(1)),
|
|
reflect.TypeOf(&fakeCodec{}),
|
|
reflect.TypeOf(&testInterface1Impl{}),
|
|
reflect.TypeOf(&nestedStruct{}),
|
|
}
|
|
r := NewRegistry()
|
|
for _, typ := range types {
|
|
r.RegisterTypeEncoder(typ, &fakeCodec{})
|
|
}
|
|
b.Run("Serial", func(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
_, err := r.LookupEncoder(types[i%len(types)])
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
}
|
|
})
|
|
b.Run("Parallel", func(b *testing.B) {
|
|
b.RunParallel(func(pb *testing.PB) {
|
|
for i := 0; pb.Next(); i++ {
|
|
_, err := r.LookupEncoder(types[i%len(types)])
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
}
|
|
})
|
|
})
|
|
}
|
|
|
|
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 is used to differentiate fakeCodec instances and to force Go to allocate a new value in
|
|
// memory for every fakeCodec. If fakeCodec were an empty struct, Go may use the same pointer
|
|
// for every instance of fakeCodec, making comparisons between pointers to instances of
|
|
// fakeCodec sometimes meaningless.
|
|
num int
|
|
}
|
|
|
|
func (*fakeCodec) EncodeValue(EncodeContext, ValueWriter, reflect.Value) error {
|
|
return nil
|
|
}
|
|
func (*fakeCodec) DecodeValue(DecodeContext, 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 }
|