github.com/jeffallen/go-ethereum@v1.1.4-0.20150910155051-571d3236c49c/accounts/abi/numbers_test.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package abi
    18  
    19  import (
    20  	"bytes"
    21  	"math/big"
    22  	"reflect"
    23  	"testing"
    24  )
    25  
    26  func TestNumberTypes(t *testing.T) {
    27  	ubytes := make([]byte, 32)
    28  	ubytes[31] = 1
    29  	sbytesmin := []byte{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}
    30  
    31  	unsigned := U256(big.NewInt(1))
    32  	if !bytes.Equal(unsigned, ubytes) {
    33  		t.Error("expected %x got %x", ubytes, unsigned)
    34  	}
    35  
    36  	signed := S256(big.NewInt(1))
    37  	if !bytes.Equal(signed, ubytes) {
    38  		t.Error("expected %x got %x", ubytes, unsigned)
    39  	}
    40  
    41  	signed = S256(big.NewInt(-1))
    42  	if !bytes.Equal(signed, sbytesmin) {
    43  		t.Error("expected %x got %x", ubytes, unsigned)
    44  	}
    45  }
    46  
    47  func TestPackNumber(t *testing.T) {
    48  	ubytes := make([]byte, 32)
    49  	ubytes[31] = 1
    50  	sbytesmin := []byte{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}
    51  	maxunsigned := []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}
    52  
    53  	packed := packNum(reflect.ValueOf(1), IntTy)
    54  	if !bytes.Equal(packed, ubytes) {
    55  		t.Errorf("expected %x got %x", ubytes, packed)
    56  	}
    57  	packed = packNum(reflect.ValueOf(-1), IntTy)
    58  	if !bytes.Equal(packed, sbytesmin) {
    59  		t.Errorf("expected %x got %x", ubytes, packed)
    60  	}
    61  	packed = packNum(reflect.ValueOf(1), UintTy)
    62  	if !bytes.Equal(packed, ubytes) {
    63  		t.Errorf("expected %x got %x", ubytes, packed)
    64  	}
    65  	packed = packNum(reflect.ValueOf(-1), UintTy)
    66  	if !bytes.Equal(packed, maxunsigned) {
    67  		t.Errorf("expected %x got %x", maxunsigned, packed)
    68  	}
    69  
    70  	packed = packNum(reflect.ValueOf("string"), UintTy)
    71  	if packed != nil {
    72  		t.Errorf("expected 'string' to pack to nil. got %x instead", packed)
    73  	}
    74  }
    75  
    76  func TestSigned(t *testing.T) {
    77  	if isSigned(reflect.ValueOf(uint(10))) {
    78  		t.Error()
    79  	}
    80  
    81  	if !isSigned(reflect.ValueOf(int(10))) {
    82  		t.Error()
    83  	}
    84  
    85  	if !isSigned(reflect.ValueOf(big.NewInt(10))) {
    86  		t.Error()
    87  	}
    88  }