github.com/dotlike13/wemix30_go@v1.8.23/swarm/network/bitvector/bitvector_test.go (about)

     1  // Copyright 2018 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 bitvector
    18  
    19  import "testing"
    20  
    21  func TestBitvectorNew(t *testing.T) {
    22  	_, err := New(0)
    23  	if err != errInvalidLength {
    24  		t.Errorf("expected err %v, got %v", errInvalidLength, err)
    25  	}
    26  
    27  	_, err = NewFromBytes(nil, 0)
    28  	if err != errInvalidLength {
    29  		t.Errorf("expected err %v, got %v", errInvalidLength, err)
    30  	}
    31  
    32  	_, err = NewFromBytes([]byte{0}, 9)
    33  	if err != errInvalidLength {
    34  		t.Errorf("expected err %v, got %v", errInvalidLength, err)
    35  	}
    36  
    37  	_, err = NewFromBytes(make([]byte, 8), 8)
    38  	if err != nil {
    39  		t.Error(err)
    40  	}
    41  }
    42  
    43  func TestBitvectorGetSet(t *testing.T) {
    44  	for _, length := range []int{
    45  		1,
    46  		2,
    47  		4,
    48  		8,
    49  		9,
    50  		15,
    51  		16,
    52  	} {
    53  		bv, err := New(length)
    54  		if err != nil {
    55  			t.Errorf("error for length %v: %v", length, err)
    56  		}
    57  
    58  		for i := 0; i < length; i++ {
    59  			if bv.Get(i) {
    60  				t.Errorf("expected false for element on index %v", i)
    61  			}
    62  		}
    63  
    64  		func() {
    65  			defer func() {
    66  				if err := recover(); err == nil {
    67  					t.Errorf("expecting panic")
    68  				}
    69  			}()
    70  			bv.Get(length + 8)
    71  		}()
    72  
    73  		for i := 0; i < length; i++ {
    74  			bv.Set(i, true)
    75  			for j := 0; j < length; j++ {
    76  				if j == i {
    77  					if !bv.Get(j) {
    78  						t.Errorf("element on index %v is not set to true", i)
    79  					}
    80  				} else {
    81  					if bv.Get(j) {
    82  						t.Errorf("element on index %v is not false", i)
    83  					}
    84  				}
    85  			}
    86  
    87  			bv.Set(i, false)
    88  
    89  			if bv.Get(i) {
    90  				t.Errorf("element on index %v is not set to false", i)
    91  			}
    92  		}
    93  	}
    94  }
    95  
    96  func TestBitvectorNewFromBytesGet(t *testing.T) {
    97  	bv, err := NewFromBytes([]byte{8}, 8)
    98  	if err != nil {
    99  		t.Error(err)
   100  	}
   101  	if !bv.Get(3) {
   102  		t.Fatalf("element 3 is not set to true: state %08b", bv.b[0])
   103  	}
   104  }