286 lines
7.5 KiB
Go
286 lines
7.5 KiB
Go
// Copyright 2023 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package external
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import (
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"context"
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"io"
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"net/http/httptest"
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"testing"
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/credentials"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/s3"
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"github.com/johannesboyne/gofakes3"
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"github.com/johannesboyne/gofakes3/backend/s3mem"
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"github.com/pingcap/errors"
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backuppb "github.com/pingcap/kvproto/pkg/brpb"
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"github.com/pingcap/tidb/br/pkg/storage"
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"github.com/stretchr/testify/require"
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"golang.org/x/exp/rand"
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)
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// mockExtStore is only used for test.
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type mockExtStore struct {
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src []byte
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idx uint64
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}
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func (s *mockExtStore) Read(p []byte) (n int, err error) {
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// Read from src to p.
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if s.idx >= uint64(len(s.src)) {
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return 0, io.EOF
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}
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n = copy(p, s.src[s.idx:])
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s.idx += uint64(n)
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return n, nil
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}
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func (s *mockExtStore) Seek(_ int64, _ int) (int64, error) {
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return 0, errors.Errorf("unsupported operation")
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}
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func (*mockExtStore) Close() error {
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return nil
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}
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func (s *mockExtStore) GetFileSize() (int64, error) {
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return int64(len(s.src)), nil
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}
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func TestByteReader(t *testing.T) {
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st, clean := NewS3WithBucketAndPrefix(t, "test", "testprefix")
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defer clean()
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// Prepare
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err := st.WriteFile(context.Background(), "testfile", []byte("abcde"))
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require.NoError(t, err)
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newRsc := func() storage.ExternalFileReader {
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rsc, err := st.Open(context.Background(), "testfile", nil)
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require.NoError(t, err)
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return rsc
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}
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// Test basic next() usage.
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br, err := newByteReader(context.Background(), newRsc(), 3)
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require.NoError(t, err)
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x := br.next(1)
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require.Equal(t, 1, len(x))
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require.Equal(t, byte('a'), x[0])
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x = br.next(2)
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require.Equal(t, 2, len(x))
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require.Equal(t, byte('b'), x[0])
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require.Equal(t, byte('c'), x[1])
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require.NoError(t, br.Close())
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// Test basic readNBytes() usage.
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br, err = newByteReader(context.Background(), newRsc(), 3)
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require.NoError(t, err)
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x, err = br.readNBytes(2)
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require.NoError(t, err)
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require.Equal(t, 2, len(x))
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require.Equal(t, byte('a'), x[0])
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require.Equal(t, byte('b'), x[1])
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require.NoError(t, br.Close())
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br, err = newByteReader(context.Background(), newRsc(), 3)
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require.NoError(t, err)
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x, err = br.readNBytes(5) // Read all the data.
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require.NoError(t, err)
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require.Equal(t, 5, len(x))
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require.Equal(t, byte('e'), x[4])
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require.NoError(t, br.Close())
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br, err = newByteReader(context.Background(), newRsc(), 3)
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require.NoError(t, err)
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_, err = br.readNBytes(7) // EOF
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require.Error(t, err)
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err = st.WriteFile(context.Background(), "testfile", []byte("abcdef"))
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require.NoError(t, err)
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ms := &mockExtStore{src: []byte("abcdef")}
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br, err = newByteReader(context.Background(), ms, 2)
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require.NoError(t, err)
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x, err = br.readNBytes(3)
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require.NoError(t, err)
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// Pollute mockExtStore to verify if the slice is not affected.
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copy(ms.src, "xyz")
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require.Equal(t, 3, len(x))
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require.Equal(t, byte('c'), x[2])
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require.NoError(t, br.Close())
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ms = &mockExtStore{src: []byte("abcdef")}
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br, err = newByteReader(context.Background(), ms, 2)
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require.NoError(t, err)
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x, err = br.readNBytes(2)
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require.NoError(t, err)
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// Pollute mockExtStore to verify if the slice is not affected.
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copy(ms.src, "xyz")
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require.Equal(t, 2, len(x))
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require.Equal(t, byte('b'), x[1])
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require.NoError(t, br.Close())
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}
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func TestByteReaderAuxBuf(t *testing.T) {
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ms := &mockExtStore{src: []byte("0123456789")}
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br, err := newByteReader(context.Background(), ms, 1)
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require.NoError(t, err)
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y1, err := br.readNBytes(1)
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require.NoError(t, err)
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require.Equal(t, []byte("0"), y1)
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y2, err := br.readNBytes(2)
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require.NoError(t, err)
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require.Equal(t, []byte("12"), y2)
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y3, err := br.readNBytes(1)
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require.NoError(t, err)
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require.Equal(t, []byte("3"), y3)
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y4, err := br.readNBytes(2)
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require.NoError(t, err)
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require.Equal(t, []byte("45"), y4)
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}
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func TestUnexpectedEOF(t *testing.T) {
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st, clean := NewS3WithBucketAndPrefix(t, "test", "testprefix")
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defer func() {
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clean()
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}()
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// Prepare
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err := st.WriteFile(context.Background(), "testfile", []byte("0123456789"))
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require.NoError(t, err)
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newRsc := func() storage.ExternalFileReader {
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rsc, err := st.Open(context.Background(), "testfile", nil)
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require.NoError(t, err)
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return rsc
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}
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br, err := newByteReader(context.Background(), newRsc(), 3)
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require.NoError(t, err)
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_, err = br.readNBytes(100)
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require.ErrorIs(t, err, io.ErrUnexpectedEOF)
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br, err = newByteReader(context.Background(), newRsc(), 3)
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require.NoError(t, err)
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_, err = br.readNBytes(100)
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require.ErrorIs(t, err, io.ErrUnexpectedEOF)
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}
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func TestEmptyContent(t *testing.T) {
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ms := &mockExtStore{src: []byte{}}
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_, err := newByteReader(context.Background(), ms, 100)
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require.Equal(t, io.EOF, err)
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st, clean := NewS3WithBucketAndPrefix(t, "test", "testprefix")
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defer clean()
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// Prepare
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err = st.WriteFile(context.Background(), "testfile", []byte(""))
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require.NoError(t, err)
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newRsc := func() storage.ExternalFileReader {
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rsc, err := st.Open(context.Background(), "testfile", nil)
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require.NoError(t, err)
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return rsc
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}
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_, err = newByteReader(context.Background(), newRsc(), 100)
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require.Equal(t, io.EOF, err)
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}
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func TestSwitchMode(t *testing.T) {
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st, clean := NewS3WithBucketAndPrefix(t, "test", "testprefix")
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defer clean()
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// Prepare
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fileSize := 1024 * 1024
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err := st.WriteFile(context.Background(), "testfile", make([]byte, fileSize))
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require.NoError(t, err)
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newRsc := func() storage.ExternalFileReader {
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rsc, err := st.Open(context.Background(), "testfile", nil)
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require.NoError(t, err)
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return rsc
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}
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ConcurrentReaderBufferSizePerConc = 100
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br, err := newByteReader(context.Background(), newRsc(), 100)
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seed := time.Now().Unix()
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rand.Seed(uint64(seed))
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t.Logf("seed: %d", seed)
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totalCnt := 0
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modeUseCon := false
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for totalCnt < fileSize {
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if rand.Intn(5) == 0 {
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if modeUseCon {
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br.switchConcurrentMode(false)
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modeUseCon = false
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} else {
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br.switchConcurrentMode(true)
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modeUseCon = true
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}
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}
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n := rand.Intn(100)
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if n == 0 {
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n = 1
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}
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if totalCnt+n > fileSize {
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n = fileSize - totalCnt
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}
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if n == 0 {
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break
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}
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y, err := br.readNBytes(n)
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if err == io.EOF {
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break
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}
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require.NoError(t, err)
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totalCnt += len(y)
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}
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require.Equal(t, fileSize, totalCnt)
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}
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// NewS3WithBucketAndPrefix creates a new S3Storage for testing.
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func NewS3WithBucketAndPrefix(t *testing.T, bucketName, prefixName string) (*storage.S3Storage, func()) {
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backend := s3mem.New()
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faker := gofakes3.New(backend)
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ts := httptest.NewServer(faker.Server())
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err := backend.CreateBucket("test")
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require.NoError(t, err)
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config := aws.NewConfig()
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config.WithEndpoint(ts.URL)
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config.WithRegion("region")
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config.WithCredentials(credentials.NewStaticCredentials("dummy-access", "dummy-secret", ""))
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config.WithS3ForcePathStyle(true) // Removes need for subdomain
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svc := s3.New(session.New(), config)
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st := storage.NewS3StorageForTest(svc, &backuppb.S3{
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Region: "region",
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Bucket: bucketName,
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Prefix: prefixName,
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Acl: "acl",
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Sse: "sse",
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StorageClass: "sc",
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})
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return st, ts.Close
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}
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