54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package multihash
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import (
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"bytes"
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"math/rand"
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"testing"
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)
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// parse multihash, and check that invalid multihashes fail
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func TestCheckMultihash(t *testing.T) {
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hashbytes := make([]byte, 32)
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c, err := rand.Read(hashbytes)
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if err != nil {
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t.Fatal(err)
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} else if c < 32 {
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t.Fatal("short read")
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}
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expected := ToMultihash(hashbytes)
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l, hl, _ := GetMultihashLength(expected)
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if l != 32 {
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t.Fatalf("expected length %d, got %d", 32, l)
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} else if hl != 2 {
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t.Fatalf("expected header length %d, got %d", 2, hl)
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}
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if _, _, err := GetMultihashLength(expected[1:]); err == nil {
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t.Fatal("expected failure on corrupt header")
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}
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if _, _, err := GetMultihashLength(expected[:len(expected)-2]); err == nil {
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t.Fatal("expected failure on short content")
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}
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dh, _ := FromMultihash(expected)
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if !bytes.Equal(dh, hashbytes) {
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t.Fatalf("expected content hash %x, got %x", hashbytes, dh)
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}
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}
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