113 lines
2.8 KiB
Go
113 lines
2.8 KiB
Go
package chunkedreader
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import (
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"context"
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"fmt"
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"io"
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"math/rand"
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"testing"
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"github.com/rclone/rclone/fstest/mockobject"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestChunkedReader(t *testing.T) {
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content := makeContent(t, 1024)
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for _, mode := range mockobject.SeekModes {
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t.Run(mode.String(), testRead(content, mode))
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}
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}
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func testRead(content []byte, mode mockobject.SeekMode) func(*testing.T) {
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return func(t *testing.T) {
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chunkSizes := []int64{-1, 0, 1, 15, 16, 17, 1023, 1024, 1025, 2000}
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offsets := []int64{0, 1, 2, 3, 4, 5, 7, 8, 9, 15, 16, 17, 31, 32, 33,
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63, 64, 65, 511, 512, 513, 1023, 1024, 1025}
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limits := []int64{-1, 0, 1, 31, 32, 33, 1023, 1024, 1025}
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cl := int64(len(content))
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bl := 32
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buf := make([]byte, bl)
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o := mockobject.New("test.bin").WithContent(content, mode)
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for ics, cs := range chunkSizes {
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for icsMax, csMax := range chunkSizes {
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// skip tests where chunkSize is much bigger than maxChunkSize
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if ics > icsMax+1 {
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continue
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}
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t.Run(fmt.Sprintf("Chunksize_%d_%d", cs, csMax), func(t *testing.T) {
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cr := New(context.Background(), o, cs, csMax)
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for _, offset := range offsets {
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for _, limit := range limits {
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what := fmt.Sprintf("offset %d, limit %d", offset, limit)
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p, err := cr.RangeSeek(context.Background(), offset, io.SeekStart, limit)
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if offset >= cl {
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require.Error(t, err, what)
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return
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}
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require.NoError(t, err, what)
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require.Equal(t, offset, p, what)
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n, err := cr.Read(buf)
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end := offset + int64(bl)
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if end > cl {
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end = cl
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}
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l := int(end - offset)
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if l < bl {
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require.Equal(t, io.EOF, err, what)
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} else {
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require.NoError(t, err, what)
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}
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require.Equal(t, l, n, what)
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require.Equal(t, content[offset:end], buf[:n], what)
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}
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}
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})
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}
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}
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}
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}
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func TestErrorAfterClose(t *testing.T) {
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content := makeContent(t, 1024)
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o := mockobject.New("test.bin").WithContent(content, mockobject.SeekModeNone)
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// Close
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cr := New(context.Background(), o, 0, 0)
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require.NoError(t, cr.Close())
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require.Error(t, cr.Close())
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// Read
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cr = New(context.Background(), o, 0, 0)
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require.NoError(t, cr.Close())
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var buf [1]byte
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_, err := cr.Read(buf[:])
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require.Error(t, err)
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// Seek
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cr = New(context.Background(), o, 0, 0)
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require.NoError(t, cr.Close())
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_, err = cr.Seek(1, io.SeekCurrent)
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require.Error(t, err)
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// RangeSeek
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cr = New(context.Background(), o, 0, 0)
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require.NoError(t, cr.Close())
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_, err = cr.RangeSeek(context.Background(), 1, io.SeekCurrent, 0)
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require.Error(t, err)
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}
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func makeContent(t *testing.T, size int) []byte {
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content := make([]byte, size)
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r := rand.New(rand.NewSource(42))
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_, err := io.ReadFull(r, content)
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assert.NoError(t, err)
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return content
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}
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