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path: root/accounts/abi/type_test.go
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// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package abi

import (
    "math/big"
    "reflect"
    "testing"

    "github.com/davecgh/go-spew/spew"
    "github.com/ethereum/go-ethereum/common"
)

// typeWithoutStringer is a alias for the Type type which simply doesn't implement
// the stringer interface to allow printing type details in the tests below.
type typeWithoutStringer Type

// Tests that all allowed types get recognized by the type parser.
func TestTypeRegexp(t *testing.T) {
    tests := []struct {
        blob string
        kind Type
    }{
        {"bool", Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}},
        {"bool[]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]bool(nil)), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[]"}},
        {"bool[2]", Type{Size: 2, Kind: reflect.Array, T: ArrayTy, Type: reflect.TypeOf([2]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[2]"}},
        {"bool[2][]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([][2]bool{}), Elem: &Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[2]"}, stringKind: "bool[2][]"}},
        {"bool[][]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([][]bool{}), Elem: &Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[]"}, stringKind: "bool[][]"}},
        {"bool[][2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2][]bool{}), Elem: &Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[]"}, stringKind: "bool[][2]"}},
        {"bool[2][2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2][2]bool{}), Elem: &Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[2]"}, stringKind: "bool[2][2]"}},
        {"bool[2][][2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2][][2]bool{}), Elem: &Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([][2]bool{}), Elem: &Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[2]"}, stringKind: "bool[2][]"}, stringKind: "bool[2][][2]"}},
        {"bool[2][2][2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2][2][2]bool{}), Elem: &Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2][2]bool{}), Elem: &Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[2]"}, stringKind: "bool[2][2]"}, stringKind: "bool[2][2][2]"}},
        {"bool[][][]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([][][]bool{}), Elem: &Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([][]bool{}), Elem: &Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[]"}, stringKind: "bool[][]"}, stringKind: "bool[][][]"}},
        {"bool[][2][]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([][2][]bool{}), Elem: &Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2][]bool{}), Elem: &Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([]bool{}), Elem: &Type{Kind: reflect.Bool, T: BoolTy, Type: reflect.TypeOf(bool(false)), stringKind: "bool"}, stringKind: "bool[]"}, stringKind: "bool[][2]"}, stringKind: "bool[][2][]"}},
        {"int8", Type{Kind: reflect.Int8, Type: int8T, Size: 8, T: IntTy, stringKind: "int8"}},
        {"int16", Type{Kind: reflect.Int16, Type: int16T, Size: 16, T: IntTy, stringKind: "int16"}},
        {"int32", Type{Kind: reflect.Int32, Type: int32T, Size: 32, T: IntTy, stringKind: "int32"}},
        {"int64", Type{Kind: reflect.Int64, Type: int64T, Size: 64, T: IntTy, stringKind: "int64"}},
        {"int256", Type{Kind: reflect.Ptr, Type: bigT, Size: 256, T: IntTy, stringKind: "int256"}},
        {"int8[]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]int8{}), Elem: &Type{Kind: reflect.Int8, Type: int8T, Size: 8, T: IntTy, stringKind: "int8"}, stringKind: "int8[]"}},
        {"int8[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]int8{}), Elem: &Type{Kind: reflect.Int8, Type: int8T, Size: 8, T: IntTy, stringKind: "int8"}, stringKind: "int8[2]"}},
        {"int16[]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]int16{}), Elem: &Type{Kind: reflect.Int16, Type: int16T, Size: 16, T: IntTy, stringKind: "int16"}, stringKind: "int16[]"}},
        {"int16[2]", Type{Size: 2, Kind: reflect.Array, T: ArrayTy, Type: reflect.TypeOf([2]int16{}), Elem: &Type{Kind: reflect.Int16, Type: int16T, Size: 16, T: IntTy, stringKind: "int16"}, stringKind: "int16[2]"}},
        {"int32[]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]int32{}), Elem: &Type{Kind: reflect.Int32, Type: int32T, Size: 32, T: IntTy, stringKind: "int32"}, stringKind: "int32[]"}},
        {"int32[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]int32{}), Elem: &Type{Kind: reflect.Int32, Type: int32T, Size: 32, T: IntTy, stringKind: "int32"}, stringKind: "int32[2]"}},
        {"int64[]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]int64{}), Elem: &Type{Kind: reflect.Int64, Type: int64T, Size: 64, T: IntTy, stringKind: "int64"}, stringKind: "int64[]"}},
        {"int64[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]int64{}), Elem: &Type{Kind: reflect.Int64, Type: int64T, Size: 64, T: IntTy, stringKind: "int64"}, stringKind: "int64[2]"}},
        {"int256[]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]*big.Int{}), Elem: &Type{Kind: reflect.Ptr, Type: bigT, Size: 256, T: IntTy, stringKind: "int256"}, stringKind: "int256[]"}},
        {"int256[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]*big.Int{}), Elem: &Type{Kind: reflect.Ptr, Type: bigT, Size: 256, T: IntTy, stringKind: "int256"}, stringKind: "int256[2]"}},
        {"uint8", Type{Kind: reflect.Uint8, Type: uint8T, Size: 8, T: UintTy, stringKind: "uint8"}},
        {"uint16", Type{Kind: reflect.Uint16, Type: uint16T, Size: 16, T: UintTy, stringKind: "uint16"}},
        {"uint32", Type{Kind: reflect.Uint32, Type: uint32T, Size: 32, T: UintTy, stringKind: "uint32"}},
        {"uint64", Type{Kind: reflect.Uint64, Type: uint64T, Size: 64, T: UintTy, stringKind: "uint64"}},
        {"uint256", Type{Kind: reflect.Ptr, Type: bigT, Size: 256, T: UintTy, stringKind: "uint256"}},
        {"uint8[]", Type{Kind: reflect.Slice, T: SliceTy, Type: reflect.TypeOf([]uint8{}), Elem: &Type{Kind: reflect.Uint8, Type: uint8T, Size: 8, T: UintTy, stringKind: "uint8"}, stringKind: "uint8[]"}},
        {"uint8[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]uint8{}), Elem: &Type{Kind: reflect.Uint8, Type: uint8T, Size: 8, T: UintTy, stringKind: "uint8"}, stringKind: "uint8[2]"}},
        {"uint16[]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([]uint16{}), Elem: &Type{Kind: reflect.Uint16, Type: uint16T, Size: 16, T: UintTy, stringKind: "uint16"}, stringKind: "uint16[]"}},
        {"uint16[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]uint16{}), Elem: &Type{Kind: reflect.Uint16, Type: uint16T, Size: 16, T: UintTy, stringKind: "uint16"}, stringKind: "uint16[2]"}},
        {"uint32[]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([]uint32{}), Elem: &Type{Kind: reflect.Uint32, Type: uint32T, Size: 32, T: UintTy, stringKind: "uint32"}, stringKind: "uint32[]"}},
        {"uint32[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]uint32{}), Elem: &Type{Kind: reflect.Uint32, Type: uint32T, Size: 32, T: UintTy, stringKind: "uint32"}, stringKind: "uint32[2]"}},
        {"uint64[]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([]uint64{}), Elem: &Type{Kind: reflect.Uint64, Type: uint64T, Size: 64, T: UintTy, stringKind: "uint64"}, stringKind: "uint64[]"}},
        {"uint64[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]uint64{}), Elem: &Type{Kind: reflect.Uint64, Type: uint64T, Size: 64, T: UintTy, stringKind: "uint64"}, stringKind: "uint64[2]"}},
        {"uint256[]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([]*big.Int{}), Elem: &Type{Kind: reflect.Ptr, Type: bigT, Size: 256, T: UintTy, stringKind: "uint256"}, stringKind: "uint256[]"}},
        {"uint256[2]", Type{Kind: reflect.Array, T: ArrayTy, Type: reflect.TypeOf([2]*big.Int{}), Size: 2, Elem: &Type{Kind: reflect.Ptr, Type: bigT, Size: 256, T: UintTy, stringKind: "uint256"}, stringKind: "uint256[2]"}},
        {"bytes32", Type{Kind: reflect.Array, T: FixedBytesTy, Size: 32, Type: reflect.TypeOf([32]byte{}), stringKind: "bytes32"}},
        {"bytes[]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([][]byte{}), Elem: &Type{Kind: reflect.Slice, Type: reflect.TypeOf([]byte{}), T: BytesTy, stringKind: "bytes"}, stringKind: "bytes[]"}},
        {"bytes[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2][]byte{}), Elem: &Type{T: BytesTy, Type: reflect.TypeOf([]byte{}), Kind: reflect.Slice, stringKind: "bytes"}, stringKind: "bytes[2]"}},
        {"bytes32[]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([][32]byte{}), Elem: &Type{Kind: reflect.Array, Type: reflect.TypeOf([32]byte{}), T: FixedBytesTy, Size: 32, stringKind: "bytes32"}, stringKind: "bytes32[]"}},
        {"bytes32[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2][32]byte{}), Elem: &Type{Kind: reflect.Array, T: FixedBytesTy, Size: 32, Type: reflect.TypeOf([32]byte{}), stringKind: "bytes32"}, stringKind: "bytes32[2]"}},
        {"string", Type{Kind: reflect.String, T: StringTy, Type: reflect.TypeOf(""), stringKind: "string"}},
        {"string[]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([]string{}), Elem: &Type{Kind: reflect.String, Type: reflect.TypeOf(""), T: StringTy, stringKind: "string"}, stringKind: "string[]"}},
        {"string[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]string{}), Elem: &Type{Kind: reflect.String, T: StringTy, Type: reflect.TypeOf(""), stringKind: "string"}, stringKind: "string[2]"}},
        {"address", Type{Kind: reflect.Array, Type: addressT, Size: 20, T: AddressTy, stringKind: "address"}},
        {"address[]", Type{T: SliceTy, Kind: reflect.Slice, Type: reflect.TypeOf([]common.Address{}), Elem: &Type{Kind: reflect.Array, Type: addressT, Size: 20, T: AddressTy, stringKind: "address"}, stringKind: "address[]"}},
        {"address[2]", Type{Kind: reflect.Array, T: ArrayTy, Size: 2, Type: reflect.TypeOf([2]common.Address{}), Elem: &Type{Kind: reflect.Array, Type: addressT, Size: 20, T: AddressTy, stringKind: "address"}, stringKind: "address[2]"}},
        // TODO when fixed types are implemented properly
        // {"fixed", Type{}},
        // {"fixed128x128", Type{}},
        // {"fixed[]", Type{}},
        // {"fixed[2]", Type{}},
        // {"fixed128x128[]", Type{}},
        // {"fixed128x128[2]", Type{}},
    }

    for _, tt := range tests {
        typ, err := NewType(tt.blob)
        if err != nil {
            t.Errorf("type %q: failed to parse type string: %v", tt.blob, err)
        }
        if !reflect.DeepEqual(typ, tt.kind) {
            t.Errorf("type %q: parsed type mismatch:\nGOT %s\nWANT %s ", tt.blob, spew.Sdump(typeWithoutStringer(typ)), spew.Sdump(typeWithoutStringer(tt.kind)))
        }
    }
}

func TestTypeCheck(t *testing.T) {
    for i, test := range []struct {
        typ   string
        input interface{}
        err   string
    }{
        {"uint", big.NewInt(1), "unsupported arg type: uint"},
        {"int", big.NewInt(1), "unsupported arg type: int"},
        {"uint256", big.NewInt(1), ""},
        {"uint256[][3][]", [][3][]*big.Int{{{}}}, ""},
        {"uint256[][][3]", [3][][]*big.Int{{{}}}, ""},
        {"uint256[3][][]", [][][3]*big.Int{{{}}}, ""},
        {"uint256[3][3][3]", [3][3][3]*big.Int{{{}}}, ""},
        {"uint8[][]", [][]uint8{}, ""},
        {"int256", big.NewInt(1), ""},
        {"uint8", uint8(1), ""},
        {"uint16", uint16(1), ""},
        {"uint32", uint32(1), ""},
        {"uint64", uint64(1), ""},
        {"int8", int8(1), ""},
        {"int16", int16(1), ""},
        {"int32", int32(1), ""},
        {"int64", int64(1), ""},
        {"uint24", big.NewInt(1), ""},
        {"uint40", big.NewInt(1), ""},
        {"uint48", big.NewInt(1), ""},
        {"uint56", big.NewInt(1), ""},
        {"uint72", big.NewInt(1), ""},
        {"uint80", big.NewInt(1), ""},
        {"uint88", big.NewInt(1), ""},
        {"uint96", big.NewInt(1), ""},
        {"uint104", big.NewInt(1), ""},
        {"uint112", big.NewInt(1), ""},
        {"uint120", big.NewInt(1), ""},
        {"uint128", big.NewInt(1), ""},
        {"uint136", big.NewInt(1), ""},
        {"uint144", big.NewInt(1), ""},
        {"uint152", big.NewInt(1), ""},
        {"uint160", big.NewInt(1), ""},
        {"uint168", big.NewInt(1), ""},
        {"uint176", big.NewInt(1), ""},
        {"uint184", big.NewInt(1), ""},
        {"uint192", big.NewInt(1), ""},
        {"uint200", big.NewInt(1), ""},
        {"uint208", big.NewInt(1), ""},
        {"uint216", big.NewInt(1), ""},
        {"uint224", big.NewInt(1), ""},
        {"uint232", big.NewInt(1), ""},
        {"uint240", big.NewInt(1), ""},
        {"uint248", big.NewInt(1), ""},
        {"int24", big.NewInt(1), ""},
        {"int40", big.NewInt(1), ""},
        {"int48", big.NewInt(1), ""},
        {"int56", big.NewInt(1), ""},
        {"int72", big.NewInt(1), ""},
        {"int80", big.NewInt(1), ""},
        {"int88", big.NewInt(1), ""},
        {"int96", big.NewInt(1), ""},
        {"int104", big.NewInt(1), ""},
        {"int112", big.NewInt(1), ""},
        {"int120", big.NewInt(1), ""},
        {"int128", big.NewInt(1), ""},
        {"int136", big.NewInt(1), ""},
        {"int144", big.NewInt(1), ""},
        {"int152", big.NewInt(1), ""},
        {"int160", big.NewInt(1), ""},
        {"int168", big.NewInt(1), ""},
        {"int176", big.NewInt(1), ""},
        {"int184", big.NewInt(1), ""},
        {"int192", big.NewInt(1), ""},
        {"int200", big.NewInt(1), ""},
        {"int208", big.NewInt(1), ""},
        {"int216", big.NewInt(1), ""},
        {"int224", big.NewInt(1), ""},
        {"int232", big.NewInt(1), ""},
        {"int240", big.NewInt(1), ""},
        {"int248", big.NewInt(1), ""},
        {"uint30", uint8(1), "abi: cannot use uint8 as type ptr as argument"},
        {"uint8", uint16(1), "abi: cannot use uint16 as type uint8 as argument"},
        {"uint8", uint32(1), "abi: cannot use uint32 as type uint8 as argument"},
        {"uint8", uint64(1), "abi: cannot use uint64 as type uint8 as argument"},
        {"uint8", int8(1), "abi: cannot use int8 as type uint8 as argument"},
        {"uint8", int16(1), "abi: cannot use int16 as type uint8 as argument"},
        {"uint8", int32(1), "abi: cannot use int32 as type uint8 as argument"},
        {"uint8", int64(1), "abi: cannot use int64 as type uint8 as argument"},
        {"uint16", uint16(1), ""},
        {"uint16", uint8(1), "abi: cannot use uint8 as type uint16 as argument"},
        {"uint16[]", []uint16{1, 2, 3}, ""},
        {"uint16[]", [3]uint16{1, 2, 3}, ""},
        {"uint16[]", []uint32{1, 2, 3}, "abi: cannot use []uint32 as type [0]uint16 as argument"},
        {"uint16[3]", [3]uint32{1, 2, 3}, "abi: cannot use [3]uint32 as type [3]uint16 as argument"},
        {"uint16[3]", [4]uint16{1, 2, 3}, "abi: cannot use [4]uint16 as type [3]uint16 as argument"},
        {"uint16[3]", []uint16{1, 2, 3}, ""},
        {"uint16[3]", []uint16{1, 2, 3, 4}, "abi: cannot use [4]uint16 as type [3]uint16 as argument"},
        {"address[]", []common.Address{{1}}, ""},
        {"address[1]", []common.Address{{1}}, ""},
        {"address[1]", [1]common.Address{{1}}, ""},
        {"address[2]", [1]common.Address{{1}}, "abi: cannot use [1]array as type [2]array as argument"},
        {"bytes32", [32]byte{}, ""},
        {"bytes31", [31]byte{}, ""},
        {"bytes30", [30]byte{}, ""},
        {"bytes29", [29]byte{}, ""},
        {"bytes28", [28]byte{}, ""},
        {"bytes27", [27]byte{}, ""},
        {"bytes26", [26]byte{}, ""},
        {"bytes25", [25]byte{}, ""},
        {"bytes24", [24]byte{}, ""},
        {"bytes23", [23]byte{}, ""},
        {"bytes22", [22]byte{}, ""},
        {"bytes21", [21]byte{}, ""},
        {"bytes20", [20]byte{}, ""},
        {"bytes19", [19]byte{}, ""},
        {"bytes18", [18]byte{}, ""},
        {"bytes17", [17]byte{}, ""},
        {"bytes16", [16]byte{}, ""},
        {"bytes15", [15]byte{}, ""},
        {"bytes14", [14]byte{}, ""},
        {"bytes13", [13]byte{}, ""},
        {"bytes12", [12]byte{}, ""},
        {"bytes11", [11]byte{}, ""},
        {"bytes10", [10]byte{}, ""},
        {"bytes9", [9]byte{}, ""},
        {"bytes8", [8]byte{}, ""},
        {"bytes7", [7]byte{}, ""},
        {"bytes6", [6]byte{}, ""},
        {"bytes5", [5]byte{}, ""},
        {"bytes4", [4]byte{}, ""},
        {"bytes3", [3]byte{}, ""},
        {"bytes2", [2]byte{}, ""},
        {"bytes1", [1]byte{}, ""},
        {"bytes32", [33]byte{}, "abi: cannot use [33]uint8 as type [32]uint8 as argument"},
        {"bytes32", common.Hash{1}, ""},
        {"bytes31", common.Hash{1}, "abi: cannot use common.Hash as type [31]uint8 as argument"},
        {"bytes31", [32]byte{}, "abi: cannot use [32]uint8 as type [31]uint8 as argument"},
        {"bytes", []byte{0, 1}, ""},
        {"bytes", [2]byte{0, 1}, "abi: cannot use array as type slice as argument"},
        {"bytes", common.Hash{1}, "abi: cannot use array as type slice as argument"},
        {"string", "hello world", ""},
        {"string", string(""), ""},
        {"string", []byte{}, "abi: cannot use slice as type string as argument"},
        {"bytes32[]", [][32]byte{{}}, ""},
        {"function", [24]byte{}, ""},
        {"bytes20", common.Address{}, ""},
        {"address", [20]byte{}, ""},
        {"address", common.Address{}, ""},
        {"bytes32[]]", "", "invalid arg type in abi"},
        {"invalidType", "", "unsupported arg type: invalidType"},
        {"invalidSlice[]", "", "unsupported arg type: invalidSlice"},
    } {
        typ, err := NewType(test.typ)
        if err != nil && len(test.err) == 0 {
            t.Fatal("unexpected parse error:", err)
        } else if err != nil && len(test.err) != 0 {
            if err.Error() != test.err {
                t.Errorf("%d failed. Expected err: '%v' got err: '%v'", i, test.err, err)
            }
            continue
        }

        err = typeCheck(typ, reflect.ValueOf(test.input))
        if err != nil && len(test.err) == 0 {
            t.Errorf("%d failed. Expected no err but got: %v", i, err)
            continue
        }
        if err == nil && len(test.err) != 0 {
            t.Errorf("%d failed. Expected err: %v but got none", i, test.err)
            continue
        }

        if err != nil && len(test.err) != 0 && err.Error() != test.err {
            t.Errorf("%d failed. Expected err: '%v' got err: '%v'", i, test.err, err)
        }
    }
}