github.com/yinchengtsinghua/golang-Eos-dpos-Ethereum@v0.0.0-20190121132951-92cc4225ed8e/swarm/multihash/multihash_test.go (about)

     1  
     2  //此源码被清华学神尹成大魔王专业翻译分析并修改
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    11  //
    12  //
    13  //
    14  //
    15  //
    16  //
    17  //
    18  //
    19  //
    20  //
    21  //
    22  //
    23  //
    24  
    25  package multihash
    26  
    27  import (
    28  	"bytes"
    29  	"math/rand"
    30  	"testing"
    31  )
    32  
    33  //
    34  func TestCheckMultihash(t *testing.T) {
    35  	hashbytes := make([]byte, 32)
    36  	c, err := rand.Read(hashbytes)
    37  	if err != nil {
    38  		t.Fatal(err)
    39  	} else if c < 32 {
    40  		t.Fatal("short read")
    41  	}
    42  
    43  	expected := ToMultihash(hashbytes)
    44  
    45  	l, hl, _ := GetMultihashLength(expected)
    46  	if l != 32 {
    47  		t.Fatalf("expected length %d, got %d", 32, l)
    48  	} else if hl != 2 {
    49  		t.Fatalf("expected header length %d, got %d", 2, hl)
    50  	}
    51  	if _, _, err := GetMultihashLength(expected[1:]); err == nil {
    52  		t.Fatal("expected failure on corrupt header")
    53  	}
    54  	if _, _, err := GetMultihashLength(expected[:len(expected)-2]); err == nil {
    55  		t.Fatal("expected failure on short content")
    56  	}
    57  	dh, _ := FromMultihash(expected)
    58  	if !bytes.Equal(dh, hashbytes) {
    59  		t.Fatalf("expected content hash %x, got %x", hashbytes, dh)
    60  	}
    61  }