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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 bsoncodec
import (
"reflect"
"strconv"
"strings"
"testing"
)
// NB(charlie): the array size is a power of 2 because we use the remainder of
// it (mod) in benchmarks and that is faster when the size is a power of 2.
var codecCacheTestTypes = [16]reflect.Type{
reflect.TypeOf(uint8(0)),
reflect.TypeOf(uint16(0)),
reflect.TypeOf(uint32(0)),
reflect.TypeOf(uint64(0)),
reflect.TypeOf(uint(0)),
reflect.TypeOf(uintptr(0)),
reflect.TypeOf(int8(0)),
reflect.TypeOf(int16(0)),
reflect.TypeOf(int32(0)),
reflect.TypeOf(int64(0)),
reflect.TypeOf(int(0)),
reflect.TypeOf(float32(0)),
reflect.TypeOf(float64(0)),
reflect.TypeOf(true),
reflect.TypeOf(struct{ A int }{}),
reflect.TypeOf(map[int]int{}),
}
func TestTypeCache(t *testing.T) {
rt := reflect.TypeOf(int(0))
ec := new(typeEncoderCache)
dc := new(typeDecoderCache)
codec := new(fakeCodec)
ec.Store(rt, codec)
dc.Store(rt, codec)
if v, ok := ec.Load(rt); !ok || !reflect.DeepEqual(v, codec) {
t.Errorf("Load(%s) = %v, %t; want: %v, %t", rt, v, ok, codec, true)
}
if v, ok := dc.Load(rt); !ok || !reflect.DeepEqual(v, codec) {
t.Errorf("Load(%s) = %v, %t; want: %v, %t", rt, v, ok, codec, true)
}
// Make sure we overwrite the stored value with nil
ec.Store(rt, nil)
dc.Store(rt, nil)
if v, ok := ec.Load(rt); ok || v != nil {
t.Errorf("Load(%s) = %v, %t; want: %v, %t", rt, v, ok, nil, false)
}
if v, ok := dc.Load(rt); ok || v != nil {
t.Errorf("Load(%s) = %v, %t; want: %v, %t", rt, v, ok, nil, false)
}
}
func TestTypeCacheClone(t *testing.T) {
codec := new(fakeCodec)
ec1 := new(typeEncoderCache)
dc1 := new(typeDecoderCache)
for _, rt := range codecCacheTestTypes {
ec1.Store(rt, codec)
dc1.Store(rt, codec)
}
ec2 := ec1.Clone()
dc2 := dc1.Clone()
for _, rt := range codecCacheTestTypes {
if v, _ := ec2.Load(rt); !reflect.DeepEqual(v, codec) {
t.Errorf("Load(%s) = %#v; want: %#v", rt, v, codec)
}
if v, _ := dc2.Load(rt); !reflect.DeepEqual(v, codec) {
t.Errorf("Load(%s) = %#v; want: %#v", rt, v, codec)
}
}
}
func TestKindCacheArray(t *testing.T) {
// Check array bounds
var c kindEncoderCache
codec := new(fakeCodec)
c.Store(reflect.UnsafePointer, codec) // valid
c.Store(reflect.UnsafePointer+1, codec) // ignored
if v, ok := c.Load(reflect.UnsafePointer); !ok || v != codec {
t.Errorf("Load(reflect.UnsafePointer) = %v, %t; want: %v, %t", v, ok, codec, true)
}
if v, ok := c.Load(reflect.UnsafePointer + 1); ok || v != nil {
t.Errorf("Load(reflect.UnsafePointer + 1) = %v, %t; want: %v, %t", v, ok, nil, false)
}
// Make sure that reflect.UnsafePointer is the last/largest reflect.Type.
//
// The String() method of invalid reflect.Type types are of the format
// "kind{NUMBER}".
for rt := reflect.UnsafePointer + 1; rt < reflect.UnsafePointer+16; rt++ {
s := rt.String()
if !strings.Contains(s, strconv.Itoa(int(rt))) {
t.Errorf("reflect.Type(%d) appears to be valid: %q", rt, s)
}
}
}
func TestKindCacheClone(t *testing.T) {
e1 := new(kindEncoderCache)
d1 := new(kindDecoderCache)
codec := new(fakeCodec)
for k := reflect.Invalid; k <= reflect.UnsafePointer; k++ {
e1.Store(k, codec)
d1.Store(k, codec)
}
e2 := e1.Clone()
for k := reflect.Invalid; k <= reflect.UnsafePointer; k++ {
v1, ok1 := e1.Load(k)
v2, ok2 := e2.Load(k)
if ok1 != ok2 || !reflect.DeepEqual(v1, v2) || v1 == nil || v2 == nil {
t.Errorf("Encoder(%s): %#v, %t != %#v, %t", k, v1, ok1, v2, ok2)
}
}
d2 := d1.Clone()
for k := reflect.Invalid; k <= reflect.UnsafePointer; k++ {
v1, ok1 := d1.Load(k)
v2, ok2 := d2.Load(k)
if ok1 != ok2 || !reflect.DeepEqual(v1, v2) || v1 == nil || v2 == nil {
t.Errorf("Decoder(%s): %#v, %t != %#v, %t", k, v1, ok1, v2, ok2)
}
}
}
func TestKindCacheEncoderNilEncoder(t *testing.T) {
t.Run("Encoder", func(t *testing.T) {
c := new(kindEncoderCache)
c.Store(reflect.Invalid, ValueEncoder(nil))
v, ok := c.Load(reflect.Invalid)
if v != nil || ok {
t.Errorf("Load of nil ValueEncoder should return: nil, false; got: %v, %t", v, ok)
}
})
t.Run("Decoder", func(t *testing.T) {
c := new(kindDecoderCache)
c.Store(reflect.Invalid, ValueDecoder(nil))
v, ok := c.Load(reflect.Invalid)
if v != nil || ok {
t.Errorf("Load of nil ValueDecoder should return: nil, false; got: %v, %t", v, ok)
}
})
}
func BenchmarkEncoderCacheLoad(b *testing.B) {
c := new(typeEncoderCache)
codec := new(fakeCodec)
typs := codecCacheTestTypes
for _, t := range typs {
c.Store(t, codec)
}
b.RunParallel(func(pb *testing.PB) {
for i := 0; pb.Next(); i++ {
c.Load(typs[i%len(typs)])
}
})
}
func BenchmarkEncoderCacheStore(b *testing.B) {
c := new(typeEncoderCache)
codec := new(fakeCodec)
b.RunParallel(func(pb *testing.PB) {
typs := codecCacheTestTypes
for i := 0; pb.Next(); i++ {
c.Store(typs[i%len(typs)], codec)
}
})
}
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