mirror of https://github.com/ethereum/go-ethereum
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
2.8 KiB
116 lines
2.8 KiB
// Copyright 2017 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 math
|
|
|
|
import (
|
|
"testing"
|
|
)
|
|
|
|
type operation byte
|
|
|
|
const (
|
|
sub operation = iota
|
|
add
|
|
mul
|
|
)
|
|
|
|
func TestOverflow(t *testing.T) {
|
|
for i, test := range []struct {
|
|
x uint64
|
|
y uint64
|
|
overflow bool
|
|
op operation
|
|
}{
|
|
// add operations
|
|
{MaxUint64, 1, true, add},
|
|
{MaxUint64 - 1, 1, false, add},
|
|
|
|
// sub operations
|
|
{0, 1, true, sub},
|
|
{0, 0, false, sub},
|
|
|
|
// mul operations
|
|
{0, 0, false, mul},
|
|
{10, 10, false, mul},
|
|
{MaxUint64, 2, true, mul},
|
|
{MaxUint64, 1, false, mul},
|
|
} {
|
|
var overflows bool
|
|
switch test.op {
|
|
case sub:
|
|
_, overflows = SafeSub(test.x, test.y)
|
|
case add:
|
|
_, overflows = SafeAdd(test.x, test.y)
|
|
case mul:
|
|
_, overflows = SafeMul(test.x, test.y)
|
|
}
|
|
|
|
if test.overflow != overflows {
|
|
t.Errorf("%d failed. Expected test to be %v, got %v", i, test.overflow, overflows)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestHexOrDecimal64(t *testing.T) {
|
|
tests := []struct {
|
|
input string
|
|
num uint64
|
|
ok bool
|
|
}{
|
|
{"", 0, true},
|
|
{"0", 0, true},
|
|
{"0x0", 0, true},
|
|
{"12345678", 12345678, true},
|
|
{"0x12345678", 0x12345678, true},
|
|
{"0X12345678", 0x12345678, true},
|
|
// Tests for leading zero behaviour:
|
|
{"0123456789", 123456789, true}, // note: not octal
|
|
{"0x00", 0, true},
|
|
{"0x012345678abc", 0x12345678abc, true},
|
|
// Invalid syntax:
|
|
{"abcdef", 0, false},
|
|
{"0xgg", 0, false},
|
|
// Doesn't fit into 64 bits:
|
|
{"18446744073709551617", 0, false},
|
|
}
|
|
for _, test := range tests {
|
|
var num HexOrDecimal64
|
|
err := num.UnmarshalText([]byte(test.input))
|
|
if (err == nil) != test.ok {
|
|
t.Errorf("ParseUint64(%q) -> (err == nil) = %t, want %t", test.input, err == nil, test.ok)
|
|
continue
|
|
}
|
|
if err == nil && uint64(num) != test.num {
|
|
t.Errorf("ParseUint64(%q) -> %d, want %d", test.input, num, test.num)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestMustParseUint64(t *testing.T) {
|
|
if v := MustParseUint64("12345"); v != 12345 {
|
|
t.Errorf(`MustParseUint64("12345") = %d, want 12345`, v)
|
|
}
|
|
}
|
|
|
|
func TestMustParseUint64Panic(t *testing.T) {
|
|
defer func() {
|
|
if recover() == nil {
|
|
t.Error("MustParseBig should've panicked")
|
|
}
|
|
}()
|
|
MustParseUint64("ggg")
|
|
}
|
|
|