storj/pkg/piecestore/rpc/client/pieceranger_test.go

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// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
package client
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import (
"context"
"fmt"
"io"
"io/ioutil"
"testing"
"github.com/golang/mock/gomock"
"github.com/stretchr/testify/assert"
pb "storj.io/storj/protos/piecestore"
)
func TestPieceRanger(t *testing.T) {
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ctrl := gomock.NewController(t)
defer ctrl.Finish()
for i, tt := range []struct {
data string
size, offset, length int64
substr string
errString string
}{
{"", 0, 0, 0, "", ""},
{"abcdef", 6, 0, 0, "", ""},
{"abcdef", 6, 3, 0, "", ""},
{"abcdef", 6, 0, 6, "abcdef", ""},
{"abcdef", 6, 0, 5, "abcde", ""},
{"abcdef", 6, 0, 4, "abcd", ""},
{"abcdef", 6, 1, 4, "bcde", ""},
{"abcdef", 6, 2, 4, "cdef", ""},
{"abcdefg", 7, 1, 4, "bcde", ""},
{"abcdef", 6, 0, 7, "abcdef", "pieceRanger error: range beyond end"},
{"abcdef", 6, -1, 7, "abcde", "pieceRanger error: negative offset"},
{"abcdef", 6, 0, -1, "abcde", "pieceRanger error: negative length"},
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} {
errTag := fmt.Sprintf("Test case #%d", i)
route := pb.NewMockPieceStoreRoutesClient(ctrl)
calls := []*gomock.Call{
route.EXPECT().Piece(
gomock.Any(), gomock.Any(), gomock.Any(),
).Return(&pb.PieceSummary{Size: int64(len(tt.data))}, nil),
}
if tt.offset >= 0 && tt.length > 0 && tt.offset+tt.length <= tt.size {
stream := pb.NewMockPieceStoreRoutes_RetrieveClient(ctrl)
calls = append(calls,
route.EXPECT().Retrieve(
gomock.Any(), gomock.Any(), gomock.Any(),
).Return(stream, nil),
stream.EXPECT().Recv().Return(
&pb.PieceRetrievalStream{
Size: tt.length,
Content: []byte(tt.data)[tt.offset : tt.offset+tt.length],
}, nil),
stream.EXPECT().Recv().Return(&pb.PieceRetrievalStream{}, io.EOF),
)
}
gomock.InOrder(calls...)
ctx := context.Background()
c := NewCustomRoute(route)
rr, err := PieceRanger(ctx, c, "")
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if assert.NoError(t, err, errTag) {
assert.Equal(t, tt.size, rr.Size(), errTag)
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}
r, err := rr.Range(ctx, tt.offset, tt.length)
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if tt.errString != "" {
assert.EqualError(t, err, tt.errString, errTag)
continue
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}
assert.NoError(t, err, errTag)
data, err := ioutil.ReadAll(r)
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if assert.NoError(t, err, errTag) {
assert.Equal(t, []byte(tt.substr), data, errTag)
}
}
}
func TestPieceRangerSize(t *testing.T) {
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ctrl := gomock.NewController(t)
defer ctrl.Finish()
for i, tt := range []struct {
data string
size, offset, length int64
substr string
errString string
}{
{"", 0, 0, 0, "", ""},
{"abcdef", 6, 0, 0, "", ""},
{"abcdef", 6, 3, 0, "", ""},
{"abcdef", 6, 0, 6, "abcdef", ""},
{"abcdef", 6, 0, 5, "abcde", ""},
{"abcdef", 6, 0, 4, "abcd", ""},
{"abcdef", 6, 1, 4, "bcde", ""},
{"abcdef", 6, 2, 4, "cdef", ""},
{"abcdefg", 7, 1, 4, "bcde", ""},
{"abcdef", 6, 0, 7, "abcdef", "pieceRanger error: range beyond end"},
{"abcdef", 6, -1, 7, "abcde", "pieceRanger error: negative offset"},
{"abcdef", 6, 0, -1, "abcde", "pieceRanger error: negative length"},
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} {
errTag := fmt.Sprintf("Test case #%d", i)
route := pb.NewMockPieceStoreRoutesClient(ctrl)
if tt.offset >= 0 && tt.length > 0 && tt.offset+tt.length <= tt.size {
stream := pb.NewMockPieceStoreRoutes_RetrieveClient(ctrl)
gomock.InOrder(
route.EXPECT().Retrieve(
gomock.Any(), gomock.Any(), gomock.Any(),
).Return(stream, nil),
stream.EXPECT().Recv().Return(
&pb.PieceRetrievalStream{
Size: tt.size,
Content: []byte(tt.data)[tt.offset : tt.offset+tt.length],
}, nil),
stream.EXPECT().Recv().Return(&pb.PieceRetrievalStream{}, io.EOF),
)
}
ctx := context.Background()
c := NewCustomRoute(route)
rr := PieceRangerSize(c, "", tt.size)
assert.Equal(t, tt.size, rr.Size(), errTag)
r, err := rr.Range(ctx, tt.offset, tt.length)
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if tt.errString != "" {
assert.EqualError(t, err, tt.errString, errTag)
continue
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}
assert.NoError(t, err, errTag)
data, err := ioutil.ReadAll(r)
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if assert.NoError(t, err, errTag) {
assert.Equal(t, []byte(tt.substr), data, errTag)
}
}
}