477 lines
14 KiB
Go
477 lines
14 KiB
Go
package rlp
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import (
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"bytes"
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"encoding/hex"
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"errors"
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"fmt"
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"io"
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"math/big"
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"reflect"
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"testing"
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"github.com/ethereum/go-ethereum/ethutil"
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)
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func TestStreamKind(t *testing.T) {
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tests := []struct {
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input string
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wantKind Kind
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wantLen uint64
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}{
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{"00", Byte, 0},
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{"01", Byte, 0},
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{"7F", Byte, 0},
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{"80", String, 0},
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{"B7", String, 55},
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{"B800", String, 0},
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{"B90400", String, 1024},
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{"BA000400", String, 1024},
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{"BB00000400", String, 1024},
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{"BFFFFFFFFFFFFFFFFF", String, ^uint64(0)},
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{"C0", List, 0},
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{"C8", List, 8},
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{"F7", List, 55},
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{"F800", List, 0},
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{"F804", List, 4},
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{"F90400", List, 1024},
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{"FFFFFFFFFFFFFFFFFF", List, ^uint64(0)},
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}
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for i, test := range tests {
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s := NewStream(bytes.NewReader(unhex(test.input)))
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kind, len, err := s.Kind()
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if err != nil {
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t.Errorf("test %d: Type returned error: %v", i, err)
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continue
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}
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if kind != test.wantKind {
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t.Errorf("test %d: kind mismatch: got %d, want %d", i, kind, test.wantKind)
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}
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if len != test.wantLen {
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t.Errorf("test %d: len mismatch: got %d, want %d", i, len, test.wantLen)
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}
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}
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}
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func TestStreamErrors(t *testing.T) {
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type calls []string
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tests := []struct {
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string
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calls
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error
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}{
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{"", calls{"Kind"}, io.EOF},
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{"", calls{"List"}, io.EOF},
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{"", calls{"Uint"}, io.EOF},
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{"C0", calls{"Bytes"}, ErrExpectedString},
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{"C0", calls{"Uint"}, ErrExpectedString},
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{"81", calls{"Bytes"}, io.ErrUnexpectedEOF},
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{"81", calls{"Uint"}, io.ErrUnexpectedEOF},
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{"BFFFFFFFFFFFFFFF", calls{"Bytes"}, io.ErrUnexpectedEOF},
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{"89000000000000000001", calls{"Uint"}, errors.New("rlp: string is larger than 64 bits")},
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{"00", calls{"List"}, ErrExpectedList},
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{"80", calls{"List"}, ErrExpectedList},
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{"C0", calls{"List", "Uint"}, EOL},
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{"C801", calls{"List", "Uint", "Uint"}, io.ErrUnexpectedEOF},
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{"C8C9", calls{"List", "Kind"}, ErrElemTooLarge},
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{"C3C2010201", calls{"List", "List", "Uint", "Uint", "ListEnd", "Uint"}, EOL},
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{"00", calls{"ListEnd"}, errNotInList},
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{"C40102", calls{"List", "Uint", "ListEnd"}, errNotAtEOL},
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}
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testfor:
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for i, test := range tests {
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s := NewStream(bytes.NewReader(unhex(test.string)))
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rs := reflect.ValueOf(s)
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for j, call := range test.calls {
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fval := rs.MethodByName(call)
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ret := fval.Call(nil)
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err := "<nil>"
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if lastret := ret[len(ret)-1].Interface(); lastret != nil {
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err = lastret.(error).Error()
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}
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if j == len(test.calls)-1 {
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if err != test.error.Error() {
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t.Errorf("test %d: last call (%s) error mismatch\ngot: %s\nwant: %v",
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i, call, err, test.error)
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}
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} else if err != "<nil>" {
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t.Errorf("test %d: call %d (%s) unexpected error: %q", i, j, call, err)
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continue testfor
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}
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}
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}
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}
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func TestStreamList(t *testing.T) {
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s := NewStream(bytes.NewReader(unhex("C80102030405060708")))
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len, err := s.List()
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if err != nil {
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t.Fatalf("List error: %v", err)
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}
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if len != 8 {
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t.Fatalf("List returned invalid length, got %d, want 8", len)
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}
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for i := uint64(1); i <= 8; i++ {
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v, err := s.Uint()
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if err != nil {
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t.Fatalf("Uint error: %v", err)
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}
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if i != v {
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t.Errorf("Uint returned wrong value, got %d, want %d", v, i)
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}
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}
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if _, err := s.Uint(); err != EOL {
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t.Errorf("Uint error mismatch, got %v, want %v", err, EOL)
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}
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if err = s.ListEnd(); err != nil {
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t.Fatalf("ListEnd error: %v", err)
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}
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}
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func TestDecodeErrors(t *testing.T) {
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r := bytes.NewReader(nil)
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if err := Decode(r, nil); err != errDecodeIntoNil {
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t.Errorf("Decode(r, nil) error mismatch, got %q, want %q", err, errDecodeIntoNil)
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}
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var nilptr *struct{}
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if err := Decode(r, nilptr); err != errDecodeIntoNil {
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t.Errorf("Decode(r, nilptr) error mismatch, got %q, want %q", err, errDecodeIntoNil)
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}
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if err := Decode(r, struct{}{}); err != errNoPointer {
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t.Errorf("Decode(r, struct{}{}) error mismatch, got %q, want %q", err, errNoPointer)
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}
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expectErr := "rlp: type chan bool is not RLP-serializable"
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if err := Decode(r, new(chan bool)); err == nil || err.Error() != expectErr {
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t.Errorf("Decode(r, new(chan bool)) error mismatch, got %q, want %q", err, expectErr)
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}
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if err := Decode(r, new(int)); err != io.EOF {
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t.Errorf("Decode(r, new(int)) error mismatch, got %q, want %q", err, io.EOF)
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}
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}
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type decodeTest struct {
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input string
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ptr interface{}
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value interface{}
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error error
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}
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type simplestruct struct {
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A int
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B string
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}
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type recstruct struct {
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I int
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Child *recstruct
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}
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var (
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veryBigInt = big.NewInt(0).Add(
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big.NewInt(0).Lsh(big.NewInt(0xFFFFFFFFFFFFFF), 16),
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big.NewInt(0xFFFF),
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)
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)
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var (
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sharedByteArray [5]byte
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sharedPtr = new(*int)
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)
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var decodeTests = []decodeTest{
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// integers
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{input: "05", ptr: new(uint32), value: uint32(5)},
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{input: "80", ptr: new(uint32), value: uint32(0)},
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{input: "8105", ptr: new(uint32), value: uint32(5)},
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{input: "820505", ptr: new(uint32), value: uint32(0x0505)},
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{input: "83050505", ptr: new(uint32), value: uint32(0x050505)},
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{input: "8405050505", ptr: new(uint32), value: uint32(0x05050505)},
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{input: "850505050505", ptr: new(uint32), error: errors.New("rlp: string is larger than 32 bits")},
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{input: "C0", ptr: new(uint32), error: ErrExpectedString},
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// slices
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{input: "C0", ptr: new([]int), value: []int{}},
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{input: "C80102030405060708", ptr: new([]int), value: []int{1, 2, 3, 4, 5, 6, 7, 8}},
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// arrays
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{input: "C0", ptr: new([5]int), value: [5]int{}},
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{input: "C50102030405", ptr: new([5]int), value: [5]int{1, 2, 3, 4, 5}},
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{input: "C6010203040506", ptr: new([5]int), error: errors.New("rlp: input List has more than 5 elements")},
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// byte slices
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{input: "01", ptr: new([]byte), value: []byte{1}},
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{input: "80", ptr: new([]byte), value: []byte{}},
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{input: "8D6162636465666768696A6B6C6D", ptr: new([]byte), value: []byte("abcdefghijklm")},
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{input: "C0", ptr: new([]byte), value: []byte{}},
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{input: "C3010203", ptr: new([]byte), value: []byte{1, 2, 3}},
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{input: "C3820102", ptr: new([]byte), error: errors.New("rlp: string is larger than 8 bits")},
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// byte arrays
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{input: "01", ptr: new([5]byte), value: [5]byte{1}},
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{input: "80", ptr: new([5]byte), value: [5]byte{}},
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{input: "850102030405", ptr: new([5]byte), value: [5]byte{1, 2, 3, 4, 5}},
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{input: "C0", ptr: new([5]byte), value: [5]byte{}},
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{input: "C3010203", ptr: new([5]byte), value: [5]byte{1, 2, 3, 0, 0}},
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{input: "C3820102", ptr: new([5]byte), error: errors.New("rlp: string is larger than 8 bits")},
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{input: "86010203040506", ptr: new([5]byte), error: errStringDoesntFitArray},
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{input: "850101", ptr: new([5]byte), error: io.ErrUnexpectedEOF},
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// byte array reuse (should be zeroed)
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{input: "850102030405", ptr: &sharedByteArray, value: [5]byte{1, 2, 3, 4, 5}},
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{input: "8101", ptr: &sharedByteArray, value: [5]byte{1}}, // kind: String
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{input: "850102030405", ptr: &sharedByteArray, value: [5]byte{1, 2, 3, 4, 5}},
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{input: "01", ptr: &sharedByteArray, value: [5]byte{1}}, // kind: Byte
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{input: "C3010203", ptr: &sharedByteArray, value: [5]byte{1, 2, 3, 0, 0}},
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{input: "C101", ptr: &sharedByteArray, value: [5]byte{1}}, // kind: List
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// zero sized byte arrays
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{input: "80", ptr: new([0]byte), value: [0]byte{}},
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{input: "C0", ptr: new([0]byte), value: [0]byte{}},
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{input: "01", ptr: new([0]byte), error: errStringDoesntFitArray},
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{input: "8101", ptr: new([0]byte), error: errStringDoesntFitArray},
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// strings
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{input: "00", ptr: new(string), value: "\000"},
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{input: "8D6162636465666768696A6B6C6D", ptr: new(string), value: "abcdefghijklm"},
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{input: "C0", ptr: new(string), error: ErrExpectedString},
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// big ints
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{input: "01", ptr: new(*big.Int), value: big.NewInt(1)},
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{input: "89FFFFFFFFFFFFFFFFFF", ptr: new(*big.Int), value: veryBigInt},
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{input: "10", ptr: new(big.Int), value: *big.NewInt(16)}, // non-pointer also works
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{input: "C0", ptr: new(*big.Int), error: ErrExpectedString},
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// structs
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{input: "C0", ptr: new(simplestruct), value: simplestruct{0, ""}},
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{input: "C105", ptr: new(simplestruct), value: simplestruct{5, ""}},
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{input: "C50583343434", ptr: new(simplestruct), value: simplestruct{5, "444"}},
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{input: "C3010101", ptr: new(simplestruct), error: errors.New("rlp: input List has too many elements")},
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{
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input: "C501C302C103",
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ptr: new(recstruct),
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value: recstruct{1, &recstruct{2, &recstruct{3, nil}}},
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},
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// pointers
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{input: "00", ptr: new(*int), value: (*int)(nil)},
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{input: "80", ptr: new(*int), value: (*int)(nil)},
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{input: "C0", ptr: new(*int), value: (*int)(nil)},
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{input: "07", ptr: new(*int), value: intp(7)},
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{input: "8108", ptr: new(*int), value: intp(8)},
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{input: "C109", ptr: new(*[]int), value: &[]int{9}},
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{input: "C58403030303", ptr: new(*[][]byte), value: &[][]byte{{3, 3, 3, 3}}},
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// pointer should be reset to nil
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{input: "05", ptr: sharedPtr, value: intp(5)},
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{input: "80", ptr: sharedPtr, value: (*int)(nil)},
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// interface{}
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{input: "00", ptr: new(interface{}), value: []byte{0}},
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{input: "01", ptr: new(interface{}), value: []byte{1}},
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{input: "80", ptr: new(interface{}), value: []byte{}},
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{input: "850505050505", ptr: new(interface{}), value: []byte{5, 5, 5, 5, 5}},
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{input: "C0", ptr: new(interface{}), value: []interface{}{}},
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{input: "C50183040404", ptr: new(interface{}), value: []interface{}{[]byte{1}, []byte{4, 4, 4}}},
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}
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func intp(i int) *int { return &i }
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func TestDecode(t *testing.T) {
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for i, test := range decodeTests {
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input, err := hex.DecodeString(test.input)
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if err != nil {
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t.Errorf("test %d: invalid hex input %q", i, test.input)
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continue
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}
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err = Decode(bytes.NewReader(input), test.ptr)
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if err != nil && test.error == nil {
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t.Errorf("test %d: unexpected Decode error: %v\ndecoding into %T\ninput %q",
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i, err, test.ptr, test.input)
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continue
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}
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if test.error != nil && fmt.Sprint(err) != fmt.Sprint(test.error) {
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t.Errorf("test %d: Decode error mismatch\ngot %v\nwant %v\ndecoding into %T\ninput %q",
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i, err, test.error, test.ptr, test.input)
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continue
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}
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deref := reflect.ValueOf(test.ptr).Elem().Interface()
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if err == nil && !reflect.DeepEqual(deref, test.value) {
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t.Errorf("test %d: value mismatch\ngot %#v\nwant %#v\ndecoding into %T\ninput %q",
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i, deref, test.value, test.ptr, test.input)
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}
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}
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}
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type testDecoder struct{ called bool }
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func (t *testDecoder) DecodeRLP(s *Stream) error {
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if _, err := s.Uint(); err != nil {
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return err
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}
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t.called = true
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return nil
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}
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func TestDecodeDecoder(t *testing.T) {
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var s struct {
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T1 testDecoder
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T2 *testDecoder
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T3 **testDecoder
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}
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if err := Decode(bytes.NewReader(unhex("C3010203")), &s); err != nil {
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t.Fatalf("Decode error: %v", err)
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}
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if !s.T1.called {
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t.Errorf("DecodeRLP was not called for (non-pointer) testDecoder")
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}
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if s.T2 == nil {
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t.Errorf("*testDecoder has not been allocated")
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} else if !s.T2.called {
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t.Errorf("DecodeRLP was not called for *testDecoder")
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}
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if s.T3 == nil || *s.T3 == nil {
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t.Errorf("**testDecoder has not been allocated")
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} else if !(*s.T3).called {
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t.Errorf("DecodeRLP was not called for **testDecoder")
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}
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}
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type byteDecoder byte
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func (bd *byteDecoder) DecodeRLP(s *Stream) error {
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_, err := s.Uint()
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*bd = 255
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return err
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}
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func (bd byteDecoder) called() bool {
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return bd == 255
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}
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// This test verifies that the byte slice/byte array logic
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// does not kick in for element types implementing Decoder.
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func TestDecoderInByteSlice(t *testing.T) {
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var slice []byteDecoder
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if err := Decode(bytes.NewReader(unhex("C101")), &slice); err != nil {
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t.Errorf("unexpected Decode error %v", err)
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} else if !slice[0].called() {
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t.Errorf("DecodeRLP not called for slice element")
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}
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var array [1]byteDecoder
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if err := Decode(bytes.NewReader(unhex("C101")), &array); err != nil {
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t.Errorf("unexpected Decode error %v", err)
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} else if !array[0].called() {
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t.Errorf("DecodeRLP not called for array element")
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}
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}
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func ExampleDecode() {
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input, _ := hex.DecodeString("C90A1486666F6F626172")
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type example struct {
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A, B int
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private int // private fields are ignored
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String string
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}
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var s example
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err := Decode(bytes.NewReader(input), &s)
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if err != nil {
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fmt.Printf("Error: %v\n", err)
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} else {
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fmt.Printf("Decoded value: %#v\n", s)
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}
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// Output:
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// Decoded value: rlp.example{A:10, B:20, private:0, String:"foobar"}
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}
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func ExampleStream() {
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input, _ := hex.DecodeString("C90A1486666F6F626172")
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s := NewStream(bytes.NewReader(input))
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// Check what kind of value lies ahead
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kind, size, _ := s.Kind()
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fmt.Printf("Kind: %v size:%d\n", kind, size)
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// Enter the list
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if _, err := s.List(); err != nil {
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fmt.Printf("List error: %v\n", err)
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return
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}
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// Decode elements
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fmt.Println(s.Uint())
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fmt.Println(s.Uint())
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fmt.Println(s.Bytes())
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// Acknowledge end of list
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if err := s.ListEnd(); err != nil {
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fmt.Printf("ListEnd error: %v\n", err)
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}
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// Output:
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// Kind: List size:9
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// 10 <nil>
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// 20 <nil>
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// [102 111 111 98 97 114] <nil>
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}
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func BenchmarkDecode(b *testing.B) {
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enc := encTest(90000)
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b.SetBytes(int64(len(enc)))
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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var s []int
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r := bytes.NewReader(enc)
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if err := Decode(r, &s); err != nil {
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b.Fatalf("Decode error: %v", err)
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}
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}
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}
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func BenchmarkDecodeIntSliceReuse(b *testing.B) {
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enc := encTest(100000)
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b.SetBytes(int64(len(enc)))
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b.ReportAllocs()
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b.ResetTimer()
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var s []int
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for i := 0; i < b.N; i++ {
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r := bytes.NewReader(enc)
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if err := Decode(r, &s); err != nil {
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b.Fatalf("Decode error: %v", err)
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}
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}
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}
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func encTest(n int) []byte {
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s := make([]interface{}, n)
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for i := 0; i < n; i++ {
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s[i] = i
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}
|
|
return ethutil.Encode(s)
|
|
}
|
|
|
|
func unhex(str string) []byte {
|
|
b, err := hex.DecodeString(str)
|
|
if err != nil {
|
|
panic(fmt.Sprintf("invalid hex string: %q", str))
|
|
}
|
|
return b
|
|
}
|