mirror of
https://github.com/octoleo/restic.git
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339 lines
10 KiB
Go
339 lines
10 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gensupport
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import (
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"bytes"
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"io"
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"io/ioutil"
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"net/http"
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"reflect"
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"strings"
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"testing"
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"google.golang.org/api/googleapi"
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)
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func TestContentSniffing(t *testing.T) {
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type testCase struct {
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data []byte // the data to read from the Reader
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finalErr error // error to return after data has been read
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wantContentType string
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wantContentTypeResult bool
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}
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for _, tc := range []testCase{
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{
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data: []byte{0, 0, 0, 0},
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finalErr: nil,
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wantContentType: "application/octet-stream",
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wantContentTypeResult: true,
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},
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{
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data: []byte(""),
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finalErr: nil,
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wantContentType: "text/plain; charset=utf-8",
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wantContentTypeResult: true,
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},
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{
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data: []byte(""),
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finalErr: io.ErrUnexpectedEOF,
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wantContentType: "text/plain; charset=utf-8",
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wantContentTypeResult: false,
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},
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{
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data: []byte("abc"),
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finalErr: nil,
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wantContentType: "text/plain; charset=utf-8",
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wantContentTypeResult: true,
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},
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{
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data: []byte("abc"),
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finalErr: io.ErrUnexpectedEOF,
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wantContentType: "text/plain; charset=utf-8",
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wantContentTypeResult: false,
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},
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// The following examples contain more bytes than are buffered for sniffing.
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{
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data: bytes.Repeat([]byte("a"), 513),
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finalErr: nil,
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wantContentType: "text/plain; charset=utf-8",
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wantContentTypeResult: true,
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},
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{
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data: bytes.Repeat([]byte("a"), 513),
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finalErr: io.ErrUnexpectedEOF,
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wantContentType: "text/plain; charset=utf-8",
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wantContentTypeResult: true, // true because error is after first 512 bytes.
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},
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} {
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er := &errReader{buf: tc.data, err: tc.finalErr}
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sct := newContentSniffer(er)
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// Even if was an error during the first 512 bytes, we should still be able to read those bytes.
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buf, err := ioutil.ReadAll(sct)
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if !reflect.DeepEqual(buf, tc.data) {
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t.Fatalf("Failed reading buffer: got: %q; want:%q", buf, tc.data)
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}
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if err != tc.finalErr {
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t.Fatalf("Reading buffer error: got: %v; want: %v", err, tc.finalErr)
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}
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ct, ok := sct.ContentType()
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if ok != tc.wantContentTypeResult {
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t.Fatalf("Content type result got: %v; want: %v", ok, tc.wantContentTypeResult)
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}
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if ok && ct != tc.wantContentType {
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t.Fatalf("Content type got: %q; want: %q", ct, tc.wantContentType)
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}
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}
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}
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type staticContentTyper struct {
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io.Reader
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}
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func (sct staticContentTyper) ContentType() string {
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return "static content type"
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}
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func TestDetermineContentType(t *testing.T) {
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data := []byte("abc")
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rdr := func() io.Reader {
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return bytes.NewBuffer(data)
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}
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type testCase struct {
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r io.Reader
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explicitConentType string
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wantContentType string
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}
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for _, tc := range []testCase{
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{
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r: rdr(),
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wantContentType: "text/plain; charset=utf-8",
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},
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{
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r: staticContentTyper{rdr()},
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wantContentType: "static content type",
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},
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{
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r: staticContentTyper{rdr()},
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explicitConentType: "explicit",
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wantContentType: "explicit",
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},
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} {
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r, ctype := DetermineContentType(tc.r, tc.explicitConentType)
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got, err := ioutil.ReadAll(r)
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if err != nil {
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t.Fatalf("Failed reading buffer: %v", err)
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}
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if !reflect.DeepEqual(got, data) {
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t.Fatalf("Failed reading buffer: got: %q; want:%q", got, data)
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}
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if ctype != tc.wantContentType {
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t.Fatalf("Content type got: %q; want: %q", ctype, tc.wantContentType)
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}
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}
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}
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func TestNewInfoFromMedia(t *testing.T) {
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const textType = "text/plain; charset=utf-8"
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for _, test := range []struct {
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desc string
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r io.Reader
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opts []googleapi.MediaOption
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wantType string
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wantMedia, wantBuffer, wantSingleChunk bool
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}{
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{
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desc: "an empty reader results in a MediaBuffer with a single, empty chunk",
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r: new(bytes.Buffer),
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opts: nil,
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wantType: textType,
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wantBuffer: true,
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wantSingleChunk: true,
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},
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{
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desc: "ContentType is observed",
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r: new(bytes.Buffer),
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opts: []googleapi.MediaOption{googleapi.ContentType("xyz")},
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wantType: "xyz",
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wantBuffer: true,
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wantSingleChunk: true,
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},
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{
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desc: "chunk size of zero: don't use a MediaBuffer; upload as a single chunk",
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r: strings.NewReader("12345"),
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opts: []googleapi.MediaOption{googleapi.ChunkSize(0)},
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wantType: textType,
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wantMedia: true,
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wantSingleChunk: true,
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},
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{
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desc: "chunk size > data size: MediaBuffer with single chunk",
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r: strings.NewReader("12345"),
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opts: []googleapi.MediaOption{googleapi.ChunkSize(100)},
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wantType: textType,
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wantBuffer: true,
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wantSingleChunk: true,
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},
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{
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desc: "chunk size == data size: MediaBuffer with single chunk",
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r: &nullReader{googleapi.MinUploadChunkSize},
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opts: []googleapi.MediaOption{googleapi.ChunkSize(1)},
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wantType: "application/octet-stream",
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wantBuffer: true,
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wantSingleChunk: true,
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},
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{
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desc: "chunk size < data size: MediaBuffer, not single chunk",
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// Note that ChunkSize = 1 is rounded up to googleapi.MinUploadChunkSize.
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r: &nullReader{2 * googleapi.MinUploadChunkSize},
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opts: []googleapi.MediaOption{googleapi.ChunkSize(1)},
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wantType: "application/octet-stream",
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wantBuffer: true,
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wantSingleChunk: false,
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},
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} {
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mi := NewInfoFromMedia(test.r, test.opts)
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if got, want := mi.mType, test.wantType; got != want {
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t.Errorf("%s: type: got %q, want %q", test.desc, got, want)
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}
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if got, want := (mi.media != nil), test.wantMedia; got != want {
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t.Errorf("%s: media non-nil: got %t, want %t", test.desc, got, want)
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}
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if got, want := (mi.buffer != nil), test.wantBuffer; got != want {
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t.Errorf("%s: buffer non-nil: got %t, want %t", test.desc, got, want)
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}
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if got, want := mi.singleChunk, test.wantSingleChunk; got != want {
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t.Errorf("%s: singleChunk: got %t, want %t", test.desc, got, want)
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}
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}
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}
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func TestUploadRequest(t *testing.T) {
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for _, test := range []struct {
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desc string
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r io.Reader
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chunkSize int
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wantContentType string
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wantUploadType string
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}{
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{
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desc: "chunk size of zero: don't use a MediaBuffer; upload as a single chunk",
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r: strings.NewReader("12345"),
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chunkSize: 0,
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wantContentType: "multipart/related;",
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},
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{
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desc: "chunk size > data size: MediaBuffer with single chunk",
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r: strings.NewReader("12345"),
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chunkSize: 100,
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wantContentType: "multipart/related;",
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},
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{
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desc: "chunk size == data size: MediaBuffer with single chunk",
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r: &nullReader{googleapi.MinUploadChunkSize},
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chunkSize: 1,
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wantContentType: "multipart/related;",
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},
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{
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desc: "chunk size < data size: MediaBuffer, not single chunk",
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// Note that ChunkSize = 1 is rounded up to googleapi.MinUploadChunkSize.
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r: &nullReader{2 * googleapi.MinUploadChunkSize},
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chunkSize: 1,
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wantUploadType: "application/octet-stream",
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},
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} {
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mi := NewInfoFromMedia(test.r, []googleapi.MediaOption{googleapi.ChunkSize(test.chunkSize)})
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h := http.Header{}
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mi.UploadRequest(h, new(bytes.Buffer))
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if got, want := h.Get("Content-Type"), test.wantContentType; !strings.HasPrefix(got, want) {
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t.Errorf("%s: Content-Type: got %q, want prefix %q", test.desc, got, want)
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}
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if got, want := h.Get("X-Upload-Content-Type"), test.wantUploadType; got != want {
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t.Errorf("%s: X-Upload-Content-Type: got %q, want %q", test.desc, got, want)
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}
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}
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}
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func TestResumableUpload(t *testing.T) {
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for _, test := range []struct {
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desc string
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r io.Reader
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chunkSize int
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wantUploadType string
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wantResumableUpload bool
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}{
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{
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desc: "chunk size of zero: don't use a MediaBuffer; upload as a single chunk",
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r: strings.NewReader("12345"),
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chunkSize: 0,
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wantUploadType: "multipart",
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wantResumableUpload: false,
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},
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{
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desc: "chunk size > data size: MediaBuffer with single chunk",
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r: strings.NewReader("12345"),
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chunkSize: 100,
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wantUploadType: "multipart",
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wantResumableUpload: false,
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},
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{
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desc: "chunk size == data size: MediaBuffer with single chunk",
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// (Because nullReader returns EOF with the last bytes.)
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r: &nullReader{googleapi.MinUploadChunkSize},
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chunkSize: googleapi.MinUploadChunkSize,
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wantUploadType: "multipart",
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wantResumableUpload: false,
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},
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{
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desc: "chunk size < data size: MediaBuffer, not single chunk",
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// Note that ChunkSize = 1 is rounded up to googleapi.MinUploadChunkSize.
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r: &nullReader{2 * googleapi.MinUploadChunkSize},
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chunkSize: 1,
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wantUploadType: "resumable",
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wantResumableUpload: true,
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},
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} {
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mi := NewInfoFromMedia(test.r, []googleapi.MediaOption{googleapi.ChunkSize(test.chunkSize)})
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if got, want := mi.UploadType(), test.wantUploadType; got != want {
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t.Errorf("%s: upload type: got %q, want %q", test.desc, got, want)
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}
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if got, want := mi.ResumableUpload("") != nil, test.wantResumableUpload; got != want {
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t.Errorf("%s: resumable upload non-nil: got %t, want %t", test.desc, got, want)
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}
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}
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}
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// A nullReader simulates reading a fixed number of bytes.
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type nullReader struct {
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remain int
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}
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// Read doesn't touch buf, but it does reduce the amount of bytes remaining
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// by len(buf).
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func (r *nullReader) Read(buf []byte) (int, error) {
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n := len(buf)
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if r.remain < n {
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n = r.remain
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}
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r.remain -= n
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var err error
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if r.remain == 0 {
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err = io.EOF
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}
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return n, err
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}
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