path: root/accounts/abi/method_test.go

// Copyright 2018 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 (
    "strings"
    "testing"
)

const methoddata = `
[
    {"type": "function", "name": "balance", "constant": true },
    {"type": "function", "name": "send", "constant": false, "inputs": [{ "name": "amount", "type": "uint256" }]},
    {"type": "function", "name": "transfer", "constant": false, "inputs": [{"name": "from", "type": "address"}, {"name": "to", "type": "address"}, {"name": "value", "type": "uint256"}], "outputs": [{"name": "success", "type": "bool"}]},
    {"constant":false,"inputs":[{"components":[{"name":"x","type":"uint256"},{"name":"y","type":"uint256"}],"name":"a","type":"tuple"}],"name":"tuple","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},
    {"constant":false,"inputs":[{"components":[{"name":"x","type":"uint256"},{"name":"y","type":"uint256"}],"name":"a","type":"tuple[]"}],"name":"tupleSlice","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},
    {"constant":false,"inputs":[{"components":[{"name":"x","type":"uint256"},{"name":"y","type":"uint256"}],"name":"a","type":"tuple[5]"}],"name":"tupleArray","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},
    {"constant":false,"inputs":[{"components":[{"name":"x","type":"uint256"},{"name":"y","type":"uint256"}],"name":"a","type":"tuple[5][]"}],"name":"complexTuple","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}
]`

func TestMethodString(t *testing.T) {
    var table = []struct {
        method      string
        expectation string
    }{
        {
            method:      "balance",
            expectation: "function balance() constant returns()",
        },
        {
            method:      "send",
            expectation: "function send(uint256 amount) returns()",
        },
        {
            method:      "transfer",
            expectation: "function transfer(address from, address to, uint256 value) returns(bool success)",
        },
        {
            method:      "tuple",
            expectation: "function tuple((uint256,uint256) a) returns()",
        },
        {
            method:      "tupleArray",
            expectation: "function tupleArray((uint256,uint256)[5] a) returns()",
        },
        {
            method:      "tupleSlice",
            expectation: "function tupleSlice((uint256,uint256)[] a) returns()",
        },
        {
            method:      "complexTuple",
            expectation: "function complexTuple((uint256,uint256)[5][] a) returns()",
        },
    }

    abi, err := JSON(strings.NewReader(methoddata))
    if err != nil {
        t.Fatal(err)
    }

    for _, test := range table {
        got := abi.Methods[test.method].String()
        if got != test.expectation {
            t.Errorf("expected string to be %s, got %s", test.expectation, got)
        }
    }
}

func TestMethodSig(t *testing.T) {
    var cases = []struct {
        method string
        expect string
    }{
        {
            method: "balance",
            expect: "balance()",
        },
        {
            method: "send",
            expect: "send(uint256)",
        },
        {
            method: "transfer",
            expect: "transfer(address,address,uint256)",
        },
        {
            method: "tuple",
            expect: "tuple((uint256,uint256))",
        },
        {
            method: "tupleArray",
            expect: "tupleArray((uint256,uint256)[5])",
        },
        {
            method: "tupleSlice",
            expect: "tupleSlice((uint256,uint256)[])",
        },
        {
            method: "complexTuple",
            expect: "complexTuple((uint256,uint256)[5][])",
        },
    }
    abi, err := JSON(strings.NewReader(methoddata))
    if err != nil {
        t.Fatal(err)
    }

    for _, test := range cases {
        got := abi.Methods[test.method].Sig()
        if got != test.expect {
            t.Errorf("expected string to be %s, got %s", test.expect, got)
        }
    }
}