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// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package proto_test
import (
"testing"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/reflect/protoreflect"
testpb "google.golang.org/protobuf/internal/testprotos/test"
)
// TestNil tests for boundary conditions when nil and typed-nil messages
// are passed to various top-level functions.
// These tests are not necessarily a statement of proper behavior,
// but exist to detect accidental changes in behavior.
func TestNil(t *testing.T) {
nilMsg := (*testpb.TestAllExtensions)(nil)
extType := testpb.E_OptionalBool
extRanger := func(protoreflect.ExtensionType, interface{}) bool { return true }
tests := []struct {
label string
test func()
panic bool
}{{
label: "Size",
test: func() { proto.Size(nil) },
}, {
label: "Size",
test: func() { proto.Size(nilMsg) },
}, {
label: "Marshal",
test: func() { proto.Marshal(nil) },
}, {
label: "Marshal",
test: func() { proto.Marshal(nilMsg) },
}, {
label: "Unmarshal",
test: func() { proto.Unmarshal(nil, nil) },
panic: true,
}, {
label: "Unmarshal",
test: func() { proto.Unmarshal(nil, nilMsg) },
panic: true,
}, {
label: "Merge",
test: func() { proto.Merge(nil, nil) },
panic: true,
}, {
label: "Merge",
test: func() { proto.Merge(nil, nilMsg) },
panic: true,
}, {
label: "Merge",
test: func() { proto.Merge(nilMsg, nil) },
panic: true,
}, {
label: "Merge",
test: func() { proto.Merge(nilMsg, nilMsg) },
panic: true,
}, {
label: "Clone",
test: func() { proto.Clone(nil) },
}, {
label: "Clone",
test: func() { proto.Clone(nilMsg) },
}, {
label: "Equal",
test: func() { proto.Equal(nil, nil) },
}, {
label: "Equal",
test: func() { proto.Equal(nil, nilMsg) },
}, {
label: "Equal",
test: func() { proto.Equal(nilMsg, nil) },
}, {
label: "Equal",
test: func() { proto.Equal(nilMsg, nilMsg) },
}, {
label: "Reset",
test: func() { proto.Reset(nil) },
panic: true,
}, {
label: "Reset",
test: func() { proto.Reset(nilMsg) },
panic: true,
}, {
label: "HasExtension",
test: func() { proto.HasExtension(nil, nil) },
}, {
label: "HasExtension",
test: func() { proto.HasExtension(nil, extType) },
}, {
label: "HasExtension",
test: func() { proto.HasExtension(nilMsg, nil) },
}, {
label: "HasExtension",
test: func() { proto.HasExtension(nilMsg, extType) },
}, {
label: "GetExtension",
test: func() { proto.GetExtension(nil, nil) },
panic: true,
}, {
label: "GetExtension",
test: func() { proto.GetExtension(nil, extType) },
}, {
label: "GetExtension",
test: func() { proto.GetExtension(nilMsg, nil) },
panic: true,
}, {
label: "GetExtension",
test: func() { proto.GetExtension(nilMsg, extType) },
}, {
label: "SetExtension",
test: func() { proto.SetExtension(nil, nil, true) },
panic: true,
}, {
label: "SetExtension",
test: func() { proto.SetExtension(nil, extType, true) },
panic: true,
}, {
label: "SetExtension",
test: func() { proto.SetExtension(nilMsg, nil, true) },
panic: true,
}, {
label: "SetExtension",
test: func() { proto.SetExtension(nilMsg, extType, true) },
panic: true,
}, {
label: "ClearExtension",
test: func() { proto.ClearExtension(nil, nil) },
panic: true,
}, {
label: "ClearExtension",
test: func() { proto.ClearExtension(nil, extType) },
panic: true,
}, {
label: "ClearExtension",
test: func() { proto.ClearExtension(nilMsg, nil) },
panic: true,
}, {
label: "ClearExtension",
test: func() { proto.ClearExtension(nilMsg, extType) },
panic: true,
}, {
label: "RangeExtensions",
test: func() { proto.RangeExtensions(nil, nil) },
}, {
label: "RangeExtensions",
test: func() { proto.RangeExtensions(nil, extRanger) },
}, {
label: "RangeExtensions",
test: func() { proto.RangeExtensions(nilMsg, nil) },
}, {
label: "RangeExtensions",
test: func() { proto.RangeExtensions(nilMsg, extRanger) },
}}
for _, tt := range tests {
t.Run(tt.label, func(t *testing.T) {
defer func() {
switch gotPanic := recover() != nil; {
case gotPanic && !tt.panic:
t.Errorf("unexpected panic")
case !gotPanic && tt.panic:
t.Errorf("expected panic")
}
}()
tt.test()
})
}
}
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