292 lines
9.8 KiB
Go
292 lines
9.8 KiB
Go
// Go support for Protocol Buffers - Google's data interchange format
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//
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// Copyright 2014 The Go Authors. All rights reserved.
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// https://github.com/golang/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package proto_test
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import (
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"fmt"
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"reflect"
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"testing"
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"github.com/golang/protobuf/proto"
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pb "github.com/golang/protobuf/proto/testdata"
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)
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func TestGetExtensionsWithMissingExtensions(t *testing.T) {
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msg := &pb.MyMessage{}
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ext1 := &pb.Ext{}
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if err := proto.SetExtension(msg, pb.E_Ext_More, ext1); err != nil {
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t.Fatalf("Could not set ext1: %s", ext1)
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}
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exts, err := proto.GetExtensions(msg, []*proto.ExtensionDesc{
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pb.E_Ext_More,
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pb.E_Ext_Text,
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})
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if err != nil {
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t.Fatalf("GetExtensions() failed: %s", err)
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}
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if exts[0] != ext1 {
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t.Errorf("ext1 not in returned extensions: %T %v", exts[0], exts[0])
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}
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if exts[1] != nil {
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t.Errorf("ext2 in returned extensions: %T %v", exts[1], exts[1])
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}
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}
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func TestGetExtensionStability(t *testing.T) {
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check := func(m *pb.MyMessage) bool {
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ext1, err := proto.GetExtension(m, pb.E_Ext_More)
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if err != nil {
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t.Fatalf("GetExtension() failed: %s", err)
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}
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ext2, err := proto.GetExtension(m, pb.E_Ext_More)
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if err != nil {
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t.Fatalf("GetExtension() failed: %s", err)
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}
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return ext1 == ext2
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}
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msg := &pb.MyMessage{Count: proto.Int32(4)}
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ext0 := &pb.Ext{}
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if err := proto.SetExtension(msg, pb.E_Ext_More, ext0); err != nil {
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t.Fatalf("Could not set ext1: %s", ext0)
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}
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if !check(msg) {
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t.Errorf("GetExtension() not stable before marshaling")
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}
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bb, err := proto.Marshal(msg)
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if err != nil {
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t.Fatalf("Marshal() failed: %s", err)
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}
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msg1 := &pb.MyMessage{}
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err = proto.Unmarshal(bb, msg1)
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if err != nil {
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t.Fatalf("Unmarshal() failed: %s", err)
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}
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if !check(msg1) {
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t.Errorf("GetExtension() not stable after unmarshaling")
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}
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}
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func TestGetExtensionDefaults(t *testing.T) {
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var setFloat64 float64 = 1
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var setFloat32 float32 = 2
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var setInt32 int32 = 3
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var setInt64 int64 = 4
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var setUint32 uint32 = 5
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var setUint64 uint64 = 6
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var setBool = true
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var setBool2 = false
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var setString = "Goodnight string"
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var setBytes = []byte("Goodnight bytes")
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var setEnum = pb.DefaultsMessage_TWO
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type testcase struct {
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ext *proto.ExtensionDesc // Extension we are testing.
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want interface{} // Expected value of extension, or nil (meaning that GetExtension will fail).
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def interface{} // Expected value of extension after ClearExtension().
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}
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tests := []testcase{
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{pb.E_NoDefaultDouble, setFloat64, nil},
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{pb.E_NoDefaultFloat, setFloat32, nil},
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{pb.E_NoDefaultInt32, setInt32, nil},
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{pb.E_NoDefaultInt64, setInt64, nil},
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{pb.E_NoDefaultUint32, setUint32, nil},
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{pb.E_NoDefaultUint64, setUint64, nil},
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{pb.E_NoDefaultSint32, setInt32, nil},
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{pb.E_NoDefaultSint64, setInt64, nil},
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{pb.E_NoDefaultFixed32, setUint32, nil},
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{pb.E_NoDefaultFixed64, setUint64, nil},
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{pb.E_NoDefaultSfixed32, setInt32, nil},
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{pb.E_NoDefaultSfixed64, setInt64, nil},
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{pb.E_NoDefaultBool, setBool, nil},
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{pb.E_NoDefaultBool, setBool2, nil},
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{pb.E_NoDefaultString, setString, nil},
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{pb.E_NoDefaultBytes, setBytes, nil},
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{pb.E_NoDefaultEnum, setEnum, nil},
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{pb.E_DefaultDouble, setFloat64, float64(3.1415)},
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{pb.E_DefaultFloat, setFloat32, float32(3.14)},
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{pb.E_DefaultInt32, setInt32, int32(42)},
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{pb.E_DefaultInt64, setInt64, int64(43)},
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{pb.E_DefaultUint32, setUint32, uint32(44)},
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{pb.E_DefaultUint64, setUint64, uint64(45)},
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{pb.E_DefaultSint32, setInt32, int32(46)},
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{pb.E_DefaultSint64, setInt64, int64(47)},
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{pb.E_DefaultFixed32, setUint32, uint32(48)},
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{pb.E_DefaultFixed64, setUint64, uint64(49)},
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{pb.E_DefaultSfixed32, setInt32, int32(50)},
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{pb.E_DefaultSfixed64, setInt64, int64(51)},
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{pb.E_DefaultBool, setBool, true},
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{pb.E_DefaultBool, setBool2, true},
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{pb.E_DefaultString, setString, "Hello, string"},
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{pb.E_DefaultBytes, setBytes, []byte("Hello, bytes")},
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{pb.E_DefaultEnum, setEnum, pb.DefaultsMessage_ONE},
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}
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checkVal := func(test testcase, msg *pb.DefaultsMessage, valWant interface{}) error {
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val, err := proto.GetExtension(msg, test.ext)
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if err != nil {
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if valWant != nil {
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return fmt.Errorf("GetExtension(): %s", err)
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}
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if want := proto.ErrMissingExtension; err != want {
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return fmt.Errorf("Unexpected error: got %v, want %v", err, want)
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}
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return nil
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}
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// All proto2 extension values are either a pointer to a value or a slice of values.
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ty := reflect.TypeOf(val)
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tyWant := reflect.TypeOf(test.ext.ExtensionType)
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if got, want := ty, tyWant; got != want {
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return fmt.Errorf("unexpected reflect.TypeOf(): got %v want %v", got, want)
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}
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tye := ty.Elem()
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tyeWant := tyWant.Elem()
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if got, want := tye, tyeWant; got != want {
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return fmt.Errorf("unexpected reflect.TypeOf().Elem(): got %v want %v", got, want)
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}
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// Check the name of the type of the value.
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// If it is an enum it will be type int32 with the name of the enum.
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if got, want := tye.Name(), tye.Name(); got != want {
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return fmt.Errorf("unexpected reflect.TypeOf().Elem().Name(): got %v want %v", got, want)
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}
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// Check that value is what we expect.
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// If we have a pointer in val, get the value it points to.
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valExp := val
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if ty.Kind() == reflect.Ptr {
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valExp = reflect.ValueOf(val).Elem().Interface()
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}
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if got, want := valExp, valWant; !reflect.DeepEqual(got, want) {
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return fmt.Errorf("unexpected reflect.DeepEqual(): got %v want %v", got, want)
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}
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return nil
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}
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setTo := func(test testcase) interface{} {
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setTo := reflect.ValueOf(test.want)
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if typ := reflect.TypeOf(test.ext.ExtensionType); typ.Kind() == reflect.Ptr {
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setTo = reflect.New(typ).Elem()
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setTo.Set(reflect.New(setTo.Type().Elem()))
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setTo.Elem().Set(reflect.ValueOf(test.want))
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}
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return setTo.Interface()
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}
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for _, test := range tests {
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msg := &pb.DefaultsMessage{}
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name := test.ext.Name
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// Check the initial value.
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if err := checkVal(test, msg, test.def); err != nil {
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t.Errorf("%s: %v", name, err)
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}
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// Set the per-type value and check value.
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name = fmt.Sprintf("%s (set to %T %v)", name, test.want, test.want)
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if err := proto.SetExtension(msg, test.ext, setTo(test)); err != nil {
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t.Errorf("%s: SetExtension(): %v", name, err)
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continue
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}
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if err := checkVal(test, msg, test.want); err != nil {
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t.Errorf("%s: %v", name, err)
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continue
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}
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// Set and check the value.
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name += " (cleared)"
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proto.ClearExtension(msg, test.ext)
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if err := checkVal(test, msg, test.def); err != nil {
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t.Errorf("%s: %v", name, err)
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}
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}
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}
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func TestExtensionsRoundTrip(t *testing.T) {
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msg := &pb.MyMessage{}
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ext1 := &pb.Ext{
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Data: proto.String("hi"),
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}
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ext2 := &pb.Ext{
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Data: proto.String("there"),
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}
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exists := proto.HasExtension(msg, pb.E_Ext_More)
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if exists {
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t.Error("Extension More present unexpectedly")
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}
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if err := proto.SetExtension(msg, pb.E_Ext_More, ext1); err != nil {
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t.Error(err)
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}
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if err := proto.SetExtension(msg, pb.E_Ext_More, ext2); err != nil {
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t.Error(err)
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}
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e, err := proto.GetExtension(msg, pb.E_Ext_More)
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if err != nil {
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t.Error(err)
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}
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x, ok := e.(*pb.Ext)
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if !ok {
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t.Errorf("e has type %T, expected testdata.Ext", e)
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} else if *x.Data != "there" {
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t.Errorf("SetExtension failed to overwrite, got %+v, not 'there'", x)
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}
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proto.ClearExtension(msg, pb.E_Ext_More)
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if _, err = proto.GetExtension(msg, pb.E_Ext_More); err != proto.ErrMissingExtension {
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t.Errorf("got %v, expected ErrMissingExtension", e)
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}
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if _, err := proto.GetExtension(msg, pb.E_X215); err == nil {
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t.Error("expected bad extension error, got nil")
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}
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if err := proto.SetExtension(msg, pb.E_X215, 12); err == nil {
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t.Error("expected extension err")
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}
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if err := proto.SetExtension(msg, pb.E_Ext_More, 12); err == nil {
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t.Error("expected some sort of type mismatch error, got nil")
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}
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}
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func TestNilExtension(t *testing.T) {
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msg := &pb.MyMessage{
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Count: proto.Int32(1),
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}
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if err := proto.SetExtension(msg, pb.E_Ext_Text, proto.String("hello")); err != nil {
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t.Fatal(err)
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}
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if err := proto.SetExtension(msg, pb.E_Ext_More, (*pb.Ext)(nil)); err == nil {
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t.Error("expected SetExtension to fail due to a nil extension")
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} else if want := "proto: SetExtension called with nil value of type *testdata.Ext"; err.Error() != want {
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t.Errorf("expected error %v, got %v", want, err)
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}
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// Note: if the behavior of Marshal is ever changed to ignore nil extensions, update
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// this test to verify that E_Ext_Text is properly propagated through marshal->unmarshal.
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}
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