github.com/sberex/go-sberex@v1.8.2-0.20181113200658-ed96ac38f7d7/common/number/uint_test.go (about)

     1  // This file is part of the go-sberex library. The go-sberex library is 
     2  // free software: you can redistribute it and/or modify it under the terms 
     3  // of the GNU Lesser General Public License as published by the Free 
     4  // Software Foundation, either version 3 of the License, or (at your option)
     5  // any later version.
     6  //
     7  // The go-sberex library is distributed in the hope that it will be useful, 
     8  // but WITHOUT ANY WARRANTY; without even the implied warranty of
     9  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 
    10  // General Public License <http://www.gnu.org/licenses/> for more details.
    11  
    12  package number
    13  
    14  import (
    15  	"math/big"
    16  	"testing"
    17  
    18  	"github.com/Sberex/go-sberex/common"
    19  )
    20  
    21  func TestSet(t *testing.T) {
    22  	a := Uint(0)
    23  	b := Uint(10)
    24  	a.Set(b)
    25  	if a.num.Cmp(b.num) != 0 {
    26  		t.Error("didn't compare", a, b)
    27  	}
    28  
    29  	c := Uint(0).SetBytes(common.Hex2Bytes("0a"))
    30  	if c.num.Cmp(big.NewInt(10)) != 0 {
    31  		t.Error("c set bytes failed.")
    32  	}
    33  }
    34  
    35  func TestInitialiser(t *testing.T) {
    36  	check := false
    37  	init := NewInitialiser(func(x *Number) *Number {
    38  		check = true
    39  		return x
    40  	})
    41  	a := init(0).Add(init(1), init(2))
    42  	if a.Cmp(init(3)) != 0 {
    43  		t.Error("expected 3. got", a)
    44  	}
    45  	if !check {
    46  		t.Error("expected limiter to be called")
    47  	}
    48  }
    49  
    50  func TestGet(t *testing.T) {
    51  	a := Uint(10)
    52  	if a.Uint64() != 10 {
    53  		t.Error("expected to get 10. got", a.Uint64())
    54  	}
    55  
    56  	a = Uint(10)
    57  	if a.Int64() != 10 {
    58  		t.Error("expected to get 10. got", a.Int64())
    59  	}
    60  }
    61  
    62  func TestCmp(t *testing.T) {
    63  	a := Uint(10)
    64  	b := Uint(10)
    65  	c := Uint(11)
    66  
    67  	if a.Cmp(b) != 0 {
    68  		t.Error("a b == 0 failed", a, b)
    69  	}
    70  
    71  	if a.Cmp(c) >= 0 {
    72  		t.Error("a c < 0 failed", a, c)
    73  	}
    74  
    75  	if c.Cmp(b) <= 0 {
    76  		t.Error("c b > 0 failed", c, b)
    77  	}
    78  }
    79  
    80  func TestMaxArith(t *testing.T) {
    81  	a := Uint(0).Add(MaxUint256, One)
    82  	if a.Cmp(Zero) != 0 {
    83  		t.Error("expected max256 + 1 = 0 got", a)
    84  	}
    85  
    86  	a = Uint(0).Sub(Uint(0), One)
    87  	if a.Cmp(MaxUint256) != 0 {
    88  		t.Error("expected 0 - 1 = max256 got", a)
    89  	}
    90  
    91  	a = Int(0).Sub(Int(0), One)
    92  	if a.Cmp(MinOne) != 0 {
    93  		t.Error("expected 0 - 1 = -1 got", a)
    94  	}
    95  }
    96  
    97  func TestConversion(t *testing.T) {
    98  	a := Int(-1)
    99  	b := a.Uint256()
   100  	if b.Cmp(MaxUint256) != 0 {
   101  		t.Error("expected -1 => unsigned to return max. got", b)
   102  	}
   103  }