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