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89 lines
2.8 KiB
89 lines
2.8 KiB
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package fourbyte
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import (
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"encoding/json"
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"fmt"
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"testing"
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"github.com/ethereum/go-ethereum/accounts/abi"
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"github.com/ethereum/go-ethereum/common"
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)
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// Tests that all the selectors contained in the 4byte database are valid.
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func TestEmbeddedDatabase(t *testing.T) {
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t.Parallel()
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db, err := New()
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if err != nil {
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t.Fatal(err)
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}
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var abistruct abi.ABI
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for id, selector := range db.embedded {
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abistring, err := parseSelector(selector)
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if err != nil {
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t.Errorf("Failed to convert selector to ABI: %v", err)
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continue
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}
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if err := json.Unmarshal(abistring, &abistruct); err != nil {
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t.Errorf("Failed to parse ABI: %v", err)
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continue
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}
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m, err := abistruct.MethodById(common.Hex2Bytes(id))
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if err != nil {
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t.Errorf("Failed to get method by id (%s): %v", id, err)
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continue
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}
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if m.Sig != selector {
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t.Errorf("Selector mismatch: have %v, want %v", m.Sig, selector)
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}
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}
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}
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// Tests that custom 4byte datasets can be handled too.
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func TestCustomDatabase(t *testing.T) {
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t.Parallel()
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// Create a new custom 4byte database with no embedded component
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tmpdir := t.TempDir()
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filename := fmt.Sprintf("%s/4byte_custom.json", tmpdir)
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db, err := NewWithFile(filename)
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if err != nil {
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t.Fatal(err)
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}
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db.embedded = make(map[string]string)
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// Ensure the database is empty, insert and verify
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calldata := common.Hex2Bytes("a52c101edeadbeef")
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if _, err = db.Selector(calldata); err == nil {
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t.Fatalf("Should not find a match on empty database")
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}
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if err = db.AddSelector("send(uint256)", calldata); err != nil {
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t.Fatalf("Failed to save file: %v", err)
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}
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if _, err = db.Selector(calldata); err != nil {
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t.Fatalf("Failed to find a match for abi signature: %v", err)
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}
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// Check that the file as persisted to disk by creating a new instance
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db2, err := NewFromFile(filename)
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if err != nil {
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t.Fatalf("Failed to create new abidb: %v", err)
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}
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if _, err = db2.Selector(calldata); err != nil {
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t.Fatalf("Failed to find a match for persisted abi signature: %v", err)
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}
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}
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