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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mmap
import (
"bytes"
"io"
"io/ioutil"
"testing"
)
func TestOpen(t *testing.T) {
const filename = "mmap_test.go"
r, err := Open(filename)
if err != nil {
t.Fatalf("Open: %v", err)
}
got := make([]byte, r.Len())
if _, err := r.ReadAt(got, 0); err != nil && err != io.EOF {
t.Fatalf("ReadAt: %v", err)
}
want, err := ioutil.ReadFile(filename)
if err != nil {
t.Fatalf("ioutil.ReadFile: %v", err)
}
if len(got) != len(want) {
t.Fatalf("got %d bytes, want %d", len(got), len(want))
}
if !bytes.Equal(got, want) {
t.Fatalf("\ngot %q\nwant %q", string(got), string(want))
}
}
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