package abi

import (
	"strings"
	"testing"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/crypto"
)

func TestEventId(t *testing.T) {
	var table = []struct {
		definition   string
		expectations map[string]common.Hash
	}{
		{
			definition: `[
			{ "type" : "event", "name" : "balance", "inputs": [{ "name" : "in", "type": "uint" }] },
			{ "type" : "event", "name" : "check", "inputs": [{ "name" : "t", "type": "address" }, { "name": "b", "type": "uint256" }] }
			]`,
			expectations: map[string]common.Hash{
				"balance": crypto.Keccak256Hash([]byte("balance(uint256)")),
				"check":   crypto.Keccak256Hash([]byte("check(address,uint256)")),
			},
		},
	}

	for _, test := range table {
		abi, err := JSON(strings.NewReader(test.definition))
		if err != nil {
			t.Fatal(err)
		}

		for name, event := range abi.Events {
			if event.Id() != test.expectations[name] {
				t.Errorf("expected id to be %x, got %x", test.expectations[name], event.Id())
			}
		}
	}
}