github.com/jonasnick/go-ethereum@v0.7.12-0.20150216215225-22176f05d387/accounts/abi/numbers_test.go (about)

     1  package abi
     2  
     3  import (
     4  	"bytes"
     5  	"math/big"
     6  	"reflect"
     7  	"testing"
     8  )
     9  
    10  func TestNumberTypes(t *testing.T) {
    11  	ubytes := make([]byte, 32)
    12  	ubytes[31] = 1
    13  	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}
    14  
    15  	unsigned := U256(big.NewInt(1))
    16  	if !bytes.Equal(unsigned, ubytes) {
    17  		t.Error("expected %x got %x", ubytes, unsigned)
    18  	}
    19  
    20  	signed := S256(big.NewInt(1))
    21  	if !bytes.Equal(signed, ubytes) {
    22  		t.Error("expected %x got %x", ubytes, unsigned)
    23  	}
    24  
    25  	signed = S256(big.NewInt(-1))
    26  	if !bytes.Equal(signed, sbytesmin) {
    27  		t.Error("expected %x got %x", ubytes, unsigned)
    28  	}
    29  }
    30  
    31  func TestPackNumber(t *testing.T) {
    32  	ubytes := make([]byte, 32)
    33  	ubytes[31] = 1
    34  	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}
    35  	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}
    36  
    37  	packed := packNum(reflect.ValueOf(1), IntTy)
    38  	if !bytes.Equal(packed, ubytes) {
    39  		t.Errorf("expected %x got %x", ubytes, packed)
    40  	}
    41  	packed = packNum(reflect.ValueOf(-1), IntTy)
    42  	if !bytes.Equal(packed, sbytesmin) {
    43  		t.Errorf("expected %x got %x", ubytes, packed)
    44  	}
    45  	packed = packNum(reflect.ValueOf(1), UintTy)
    46  	if !bytes.Equal(packed, ubytes) {
    47  		t.Errorf("expected %x got %x", ubytes, packed)
    48  	}
    49  	packed = packNum(reflect.ValueOf(-1), UintTy)
    50  	if !bytes.Equal(packed, maxunsigned) {
    51  		t.Errorf("expected %x got %x", maxunsigned, packed)
    52  	}
    53  
    54  	packed = packNum(reflect.ValueOf("string"), UintTy)
    55  	if packed != nil {
    56  		t.Errorf("expected 'string' to pack to nil. got %x instead", packed)
    57  	}
    58  }
    59  
    60  func TestSigned(t *testing.T) {
    61  	if isSigned(reflect.ValueOf(uint(10))) {
    62  		t.Error()
    63  	}
    64  
    65  	if !isSigned(reflect.ValueOf(int(10))) {
    66  		t.Error()
    67  	}
    68  
    69  	if !isSigned(reflect.ValueOf(big.NewInt(10))) {
    70  		t.Error()
    71  	}
    72  }