distribution/registry/storage/driver/azure/zerofillwriter_test.go

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package azure
import (
"bytes"
"testing"
)
func Test_zeroFillWrite_AppendNoGap(t *testing.T) {
s := NewStorageSimulator()
bw := newRandomBlobWriter(&s, 1024*1)
zw := newZeroFillWriter(&bw)
if err := s.CreateBlockBlob("a", "b"); err != nil {
t.Fatal(err)
}
firstChunk := randomContents(1024*3 + 512)
if nn, err := zw.Write("a", "b", 0, bytes.NewReader(firstChunk)); err != nil {
t.Fatal(err)
} else if expected := int64(len(firstChunk)); expected != nn {
t.Fatalf("wrong written bytes count: %v, expected: %v", nn, expected)
}
if out, err := s.GetBlob("a", "b"); err != nil {
t.Fatal(err)
} else {
assertBlobContents(t, out, firstChunk)
}
secondChunk := randomContents(256)
if nn, err := zw.Write("a", "b", int64(len(firstChunk)), bytes.NewReader(secondChunk)); err != nil {
t.Fatal(err)
} else if expected := int64(len(secondChunk)); expected != nn {
t.Fatalf("wrong written bytes count: %v, expected: %v", nn, expected)
}
if out, err := s.GetBlob("a", "b"); err != nil {
t.Fatal(err)
} else {
assertBlobContents(t, out, append(firstChunk, secondChunk...))
}
}
func Test_zeroFillWrite_StartWithGap(t *testing.T) {
s := NewStorageSimulator()
bw := newRandomBlobWriter(&s, 1024*2)
zw := newZeroFillWriter(&bw)
if err := s.CreateBlockBlob("a", "b"); err != nil {
t.Fatal(err)
}
chunk := randomContents(1024 * 5)
padding := int64(1024*2 + 256)
if nn, err := zw.Write("a", "b", padding, bytes.NewReader(chunk)); err != nil {
t.Fatal(err)
} else if expected := int64(len(chunk)); expected != nn {
t.Fatalf("wrong written bytes count: %v, expected: %v", nn, expected)
}
if out, err := s.GetBlob("a", "b"); err != nil {
t.Fatal(err)
} else {
assertBlobContents(t, out, append(make([]byte, padding), chunk...))
}
}
func Test_zeroFillWrite_AppendWithGap(t *testing.T) {
s := NewStorageSimulator()
bw := newRandomBlobWriter(&s, 1024*2)
zw := newZeroFillWriter(&bw)
if err := s.CreateBlockBlob("a", "b"); err != nil {
t.Fatal(err)
}
firstChunk := randomContents(1024*3 + 512)
if _, err := zw.Write("a", "b", 0, bytes.NewReader(firstChunk)); err != nil {
t.Fatal(err)
}
if out, err := s.GetBlob("a", "b"); err != nil {
t.Fatal(err)
} else {
assertBlobContents(t, out, firstChunk)
}
secondChunk := randomContents(256)
padding := int64(1024 * 4)
if nn, err := zw.Write("a", "b", int64(len(firstChunk))+padding, bytes.NewReader(secondChunk)); err != nil {
t.Fatal(err)
} else if expected := int64(len(secondChunk)); expected != nn {
t.Fatalf("wrong written bytes count: %v, expected: %v", nn, expected)
}
if out, err := s.GetBlob("a", "b"); err != nil {
t.Fatal(err)
} else {
assertBlobContents(t, out, append(firstChunk, append(make([]byte, padding), secondChunk...)...))
}
}
func Test_zeroFillWrite_LiesWithinSize(t *testing.T) {
s := NewStorageSimulator()
bw := newRandomBlobWriter(&s, 1024*2)
zw := newZeroFillWriter(&bw)
if err := s.CreateBlockBlob("a", "b"); err != nil {
t.Fatal(err)
}
firstChunk := randomContents(1024 * 3)
if _, err := zw.Write("a", "b", 0, bytes.NewReader(firstChunk)); err != nil {
t.Fatal(err)
}
if out, err := s.GetBlob("a", "b"); err != nil {
t.Fatal(err)
} else {
assertBlobContents(t, out, firstChunk)
}
// in this case, zerofill won't be used
secondChunk := randomContents(256)
if nn, err := zw.Write("a", "b", 0, bytes.NewReader(secondChunk)); err != nil {
t.Fatal(err)
} else if expected := int64(len(secondChunk)); expected != nn {
t.Fatalf("wrong written bytes count: %v, expected: %v", nn, expected)
}
if out, err := s.GetBlob("a", "b"); err != nil {
t.Fatal(err)
} else {
assertBlobContents(t, out, append(secondChunk, firstChunk[len(secondChunk):]...))
}
}