path: root/common/big_test.go

// Copyright 2014 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum 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.
//
// go-ethereum 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 go-ethereum.  If not, see <http://www.gnu.org/licenses/>.

package common

import (
    "bytes"
    "testing"
)

func TestMisc(t *testing.T) {
    a := Big("10")
    b := Big("57896044618658097711785492504343953926634992332820282019728792003956564819968")
    c := []byte{1, 2, 3, 4}
    z := BitTest(a, 1)

    if z != true {
        t.Error("Expected true got", z)
    }

    U256(a)
    S256(a)

    U256(b)
    S256(b)

    BigD(c)
}

func TestBigMax(t *testing.T) {
    a := Big("10")
    b := Big("5")

    max1 := BigMax(a, b)
    if max1 != a {
        t.Errorf("Expected %d got %d", a, max1)
    }

    max2 := BigMax(b, a)
    if max2 != a {
        t.Errorf("Expected %d got %d", a, max2)
    }
}

func TestBigMin(t *testing.T) {
    a := Big("10")
    b := Big("5")

    min1 := BigMin(a, b)
    if min1 != b {
        t.Errorf("Expected %d got %d", b, min1)
    }

    min2 := BigMin(b, a)
    if min2 != b {
        t.Errorf("Expected %d got %d", b, min2)
    }
}

func TestBigCopy(t *testing.T) {
    a := Big("10")
    b := BigCopy(a)
    c := Big("1000000000000")
    y := BigToBytes(b, 16)
    ybytes := []byte{0, 10}
    z := BigToBytes(c, 16)
    zbytes := []byte{232, 212, 165, 16, 0}

    if bytes.Compare(y, ybytes) != 0 {
        t.Error("Got", ybytes)
    }

    if bytes.Compare(z, zbytes) != 0 {
        t.Error("Got", zbytes)
    }
}