sdk/go/keepclient/collectionreader_test.go

   1 package keepclient
   2
   3 import (
   4         "crypto/md5"
   5         "crypto/rand"
   6         "fmt"
   7         "io"
   8         "io/ioutil"
   9         "net/http"
  10         "os"
  11         "strconv"
  12         "strings"
  13
  14         "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
  15         "git.curoverse.com/arvados.git/sdk/go/arvadostest"
  16         check "gopkg.in/check.v1"
  17 )
  18
  19 var _ = check.Suite(&CollectionReaderUnit{})
  20
  21 type CollectionReaderUnit struct {
  22         arv     *arvadosclient.ArvadosClient
  23         kc      *KeepClient
  24         handler SuccessHandler
  25 }
  26
  27 func (s *CollectionReaderUnit) SetUpTest(c *check.C) {
  28         var err error
  29         s.arv, err = arvadosclient.MakeArvadosClient()
  30         c.Assert(err, check.IsNil)
  31         s.arv.ApiToken = arvadostest.ActiveToken
  32
  33         s.kc, err = MakeKeepClient(s.arv)
  34         c.Assert(err, check.IsNil)
  35
  36         s.handler = SuccessHandler{
  37                 disk: make(map[string][]byte),
  38                 lock: make(chan struct{}, 1),
  39                 ops:  new(int),
  40         }
  41         localRoots := make(map[string]string)
  42         for i, k := range RunSomeFakeKeepServers(s.handler, 4) {
  43                 localRoots[fmt.Sprintf("zzzzz-bi6l4-fakefakefake%03d", i)] = k.url
  44         }
  45         s.kc.SetServiceRoots(localRoots, localRoots, nil)
  46 }
  47
  48 type SuccessHandler struct {
  49         disk map[string][]byte
  50         lock chan struct{} // channel with buffer==1: full when an operation is in progress.
  51         ops  *int          // number of operations completed
  52 }
  53
  54 func (h SuccessHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
  55         switch req.Method {
  56         case "PUT":
  57                 buf, err := ioutil.ReadAll(req.Body)
  58                 if err != nil {
  59                         resp.WriteHeader(500)
  60                         return
  61                 }
  62                 pdh := fmt.Sprintf("%x+%d", md5.Sum(buf), len(buf))
  63                 h.lock <- struct{}{}
  64                 h.disk[pdh] = buf
  65                 if h.ops != nil {
  66                         (*h.ops)++
  67                 }
  68                 <-h.lock
  69                 resp.Write([]byte(pdh))
  70         case "GET":
  71                 pdh := req.URL.Path[1:]
  72                 h.lock <- struct{}{}
  73                 buf, ok := h.disk[pdh]
  74                 if h.ops != nil {
  75                         (*h.ops)++
  76                 }
  77                 <-h.lock
  78                 if !ok {
  79                         resp.WriteHeader(http.StatusNotFound)
  80                 } else {
  81                         resp.Write(buf)
  82                 }
  83         default:
  84                 resp.WriteHeader(http.StatusMethodNotAllowed)
  85         }
  86 }
  87
  88 type rdrTest struct {
  89         mt   string      // manifest text
  90         f    string      // filename
  91         want interface{} // error or string to expect
  92 }
  93
  94 func (s *CollectionReaderUnit) TestCollectionReaderContent(c *check.C) {
  95         s.kc.PutB([]byte("foo"))
  96         s.kc.PutB([]byte("bar"))
  97         s.kc.PutB([]byte("Hello world\n"))
  98         s.kc.PutB([]byte(""))
  99
 100         mt := arvadostest.PathologicalManifest
 101
 102         for _, testCase := range []rdrTest{
 103                 {mt: mt, f: "zzzz", want: os.ErrNotExist},
 104                 {mt: mt, f: "frob", want: os.ErrNotExist},
 105                 {mt: mt, f: "/segmented/frob", want: os.ErrNotExist},
 106                 {mt: mt, f: "./segmented/frob", want: os.ErrNotExist},
 107                 {mt: mt, f: "/f", want: os.ErrNotExist},
 108                 {mt: mt, f: "./f", want: os.ErrNotExist},
 109                 {mt: mt, f: "foo bar//baz", want: os.ErrNotExist},
 110                 {mt: mt, f: "foo/zero", want: ""},
 111                 {mt: mt, f: "zero@0", want: ""},
 112                 {mt: mt, f: "zero@1", want: ""},
 113                 {mt: mt, f: "zero@4", want: ""},
 114                 {mt: mt, f: "zero@9", want: ""},
 115                 {mt: mt, f: "f", want: "f"},
 116                 {mt: mt, f: "ooba", want: "ooba"},
 117                 {mt: mt, f: "overlapReverse/o", want: "o"},
 118                 {mt: mt, f: "overlapReverse/oo", want: "oo"},
 119                 {mt: mt, f: "overlapReverse/ofoo", want: "ofoo"},
 120                 {mt: mt, f: "foo bar/baz", want: "foo"},
 121                 {mt: mt, f: "segmented/frob", want: "frob"},
 122                 {mt: mt, f: "segmented/oof", want: "oof"},
 123         } {
 124                 rdr, err := s.kc.CollectionFileReader(map[string]interface{}{"manifest_text": testCase.mt}, testCase.f)
 125                 switch want := testCase.want.(type) {
 126                 case error:
 127                         c.Check(rdr, check.IsNil)
 128                         c.Check(err, check.Equals, want)
 129                 case string:
 130                         buf := make([]byte, len(want))
 131                         n, err := io.ReadFull(rdr, buf)
 132                         c.Check(err, check.IsNil)
 133                         for i := 0; i < 4; i++ {
 134                                 c.Check(string(buf), check.Equals, want)
 135                                 n, err = rdr.Read(buf)
 136                                 c.Check(n, check.Equals, 0)
 137                                 c.Check(err, check.Equals, io.EOF)
 138                         }
 139                         c.Check(rdr.Close(), check.Equals, nil)
 140                 }
 141         }
 142 }
 143
 144 func (s *CollectionReaderUnit) TestCollectionReaderManyBlocks(c *check.C) {
 145         h := md5.New()
 146         buf := make([]byte, 4096)
 147         locs := make([]string, len(buf))
 148         filesize := 0
 149         for i := 0; i < len(locs); i++ {
 150                 _, err := io.ReadFull(rand.Reader, buf[:i])
 151                 c.Assert(err, check.IsNil)
 152                 h.Write(buf[:i])
 153                 locs[i], _, err = s.kc.PutB(buf[:i])
 154                 c.Assert(err, check.IsNil)
 155                 filesize += i
 156         }
 157         manifest := "./random " + strings.Join(locs, " ") + " 0:" + strconv.Itoa(filesize) + ":bytes.bin\n"
 158         dataMD5 := h.Sum(nil)
 159
 160         checkMD5 := md5.New()
 161         rdr, err := s.kc.CollectionFileReader(map[string]interface{}{"manifest_text": manifest}, "random/bytes.bin")
 162         c.Check(err, check.IsNil)
 163         _, err = io.Copy(checkMD5, rdr)
 164         c.Check(err, check.IsNil)
 165         _, err = rdr.Read(make([]byte, 1))
 166         c.Check(err, check.Equals, io.EOF)
 167         c.Check(checkMD5.Sum(nil), check.DeepEquals, dataMD5)
 168 }
 169
 170 func (s *CollectionReaderUnit) TestCollectionReaderCloseEarly(c *check.C) {
 171         s.kc.PutB([]byte("foo"))
 172
 173         mt := ". "
 174         for i := 0; i < 1000; i++ {
 175                 mt += "acbd18db4cc2f85cedef654fccc4a4d8+3 "
 176         }
 177         mt += "0:3000:foo1000.txt\n"
 178
 179         // Grab the stub server's lock, ensuring our cfReader doesn't
 180         // get anything back from its first call to kc.Get() before we
 181         // have a chance to call Close().
 182         s.handler.lock <- struct{}{}
 183         opsBeforeRead := *s.handler.ops
 184
 185         rdr, err := s.kc.CollectionFileReader(map[string]interface{}{"manifest_text": mt}, "foo1000.txt")
 186         c.Assert(err, check.IsNil)
 187
 188         firstReadDone := make(chan struct{})
 189         go func() {
 190                 rdr.Read(make([]byte, 6))
 191                 firstReadDone <- struct{}{}
 192         }()
 193         err = rdr.Close()
 194         c.Assert(err, check.IsNil)
 195         c.Assert(rdr.(*cfReader).Error(), check.IsNil)
 196
 197         // Release the stub server's lock. The first GET operation will proceed.
 198         <-s.handler.lock
 199
 200         // Make sure our first read operation consumes the data
 201         // received from the first GET.
 202         <-firstReadDone
 203
 204         // doGet() should close toRead before sending any more bufs to it.
 205         if what, ok := <-rdr.(*cfReader).toRead; ok {
 206                 c.Errorf("Got %q, expected toRead to be closed", what)
 207         }
 208
 209         // Stub should have handled exactly one GET request.
 210         c.Assert(*s.handler.ops, check.Equals, opsBeforeRead+1)
 211 }
 212
 213 func (s *CollectionReaderUnit) TestCollectionReaderDataError(c *check.C) {
 214         manifest := ". ffffffffffffffffffffffffffffffff+1 0:1:notfound.txt\n"
 215         buf := make([]byte, 1)
 216         rdr, err := s.kc.CollectionFileReader(map[string]interface{}{"manifest_text": manifest}, "notfound.txt")
 217         c.Check(err, check.IsNil)
 218         for i := 0; i < 2; i++ {
 219                 _, err = io.ReadFull(rdr, buf)
 220                 c.Check(err, check.NotNil)
 221                 c.Check(err, check.Not(check.Equals), io.EOF)
 222         }
 223         c.Check(rdr.Close(), check.NotNil)
 224 }