77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
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// Copyright 2022 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 rawdb
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import (
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"bytes"
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"io/ioutil"
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"os"
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"testing"
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)
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func TestCopyFrom(t *testing.T) {
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var (
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content = []byte{0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8}
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prefix = []byte{0x9, 0xa, 0xb, 0xc, 0xd, 0xf}
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)
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var cases = []struct {
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src, dest string
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offset uint64
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writePrefix bool
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}{
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{"foo", "bar", 0, false},
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{"foo", "bar", 1, false},
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{"foo", "bar", 8, false},
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{"foo", "foo", 0, false},
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{"foo", "foo", 1, false},
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{"foo", "foo", 8, false},
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{"foo", "bar", 0, true},
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{"foo", "bar", 1, true},
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{"foo", "bar", 8, true},
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}
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for _, c := range cases {
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ioutil.WriteFile(c.src, content, 0644)
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if err := copyFrom(c.src, c.dest, c.offset, func(f *os.File) error {
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if !c.writePrefix {
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return nil
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}
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f.Write(prefix)
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return nil
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}); err != nil {
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os.Remove(c.src)
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t.Fatalf("Failed to copy %v", err)
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}
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blob, err := ioutil.ReadFile(c.dest)
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if err != nil {
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os.Remove(c.src)
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os.Remove(c.dest)
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t.Fatalf("Failed to read %v", err)
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}
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want := content[c.offset:]
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if c.writePrefix {
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want = append(prefix, want...)
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}
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if !bytes.Equal(blob, want) {
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t.Fatal("Unexpected value")
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}
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os.Remove(c.src)
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os.Remove(c.dest)
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}
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}
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