storj/pkg/ranger/file_test.go
2018-06-19 18:59:09 +03:00

70 lines
1.6 KiB
Go

// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
package ranger
import (
"bytes"
"context"
"io/ioutil"
"testing"
)
func TestFileRanger(t *testing.T) {
for _, example := range []struct {
data string
size, offset, length int64
substr string
fail bool
}{
{"", 0, 0, 0, "", false},
{"abcdef", 6, 0, 0, "", false},
{"abcdef", 6, 3, 0, "", false},
{"abcdef", 6, 0, 6, "abcdef", false},
{"abcdef", 6, 0, 5, "abcde", false},
{"abcdef", 6, 0, 4, "abcd", false},
{"abcdef", 6, 1, 4, "bcde", false},
{"abcdef", 6, 2, 4, "cdef", false},
{"abcdefg", 7, 1, 4, "bcde", false},
{"abcdef", 6, 0, 7, "", true},
{"abcdef", 6, -1, 7, "abcde", true},
{"abcdef", 6, 0, -1, "abcde", true},
} {
fh, err := ioutil.TempFile("", "test")
if err != nil {
t.Fatalf("failed making tempfile")
}
_, err = fh.Write([]byte(example.data))
if err != nil {
t.Fatalf("failed writing data")
}
name := fh.Name()
err = fh.Close()
if err != nil {
t.Fatalf("failed closing data")
}
rr, err := FileRanger(name)
if err != nil {
t.Fatalf("failed opening tempfile")
}
defer rr.Close()
if rr.Size() != example.size {
t.Fatalf("invalid size: %v != %v", rr.Size(), example.size)
}
r, err := rr.Range(context.Background(), example.offset, example.length)
if example.fail {
if err == nil {
t.Fatalf("expected error")
}
return
}
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
data, err := ioutil.ReadAll(r)
if !bytes.Equal(data, []byte(example.substr)) {
t.Fatalf("invalid subrange: %#v != %#v", string(data), example.substr)
}
}
}