6e4f9a2e3e
This change is slightly more complex than previous package maves in that the package name changed. To address this, we simply always reference the package driver as storagedriver to avoid compatbility issues with existing code. While unfortunate, this can be cleaned up over time. Signed-off-by: Stephen J Day <stephen.day@docker.com>
149 lines
3.5 KiB
Go
149 lines
3.5 KiB
Go
package storage
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import (
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"bytes"
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"crypto/rand"
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"io"
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"os"
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"testing"
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"github.com/docker/distribution/digest"
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"github.com/docker/distribution/registry/storage/driver/inmemory"
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)
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// TestSimpleWrite takes the fileWriter through common write operations
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// ensuring data integrity.
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func TestSimpleWrite(t *testing.T) {
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content := make([]byte, 1<<20)
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n, err := rand.Read(content)
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if err != nil {
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t.Fatalf("unexpected error building random data: %v", err)
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}
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if n != len(content) {
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t.Fatalf("random read did't fill buffer")
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}
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dgst, err := digest.FromReader(bytes.NewReader(content))
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if err != nil {
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t.Fatalf("unexpected error digesting random content: %v", err)
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}
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driver := inmemory.New()
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path := "/random"
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fw, err := newFileWriter(driver, path)
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if err != nil {
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t.Fatalf("unexpected error creating fileWriter: %v", err)
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}
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defer fw.Close()
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n, err = fw.Write(content)
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if err != nil {
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t.Fatalf("unexpected error writing content: %v", err)
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}
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if n != len(content) {
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t.Fatalf("unexpected write length: %d != %d", n, len(content))
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}
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fr, err := newFileReader(driver, path)
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if err != nil {
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t.Fatalf("unexpected error creating fileReader: %v", err)
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}
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defer fr.Close()
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verifier := digest.NewDigestVerifier(dgst)
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io.Copy(verifier, fr)
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if !verifier.Verified() {
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t.Fatalf("unable to verify write data")
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}
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// Check the seek position is equal to the content length
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end, err := fw.Seek(0, os.SEEK_END)
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if err != nil {
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t.Fatalf("unexpected error seeking: %v", err)
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}
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if end != int64(len(content)) {
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t.Fatalf("write did not advance offset: %d != %d", end, len(content))
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}
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// Double the content, but use the WriteAt method
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doubled := append(content, content...)
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doubledgst, err := digest.FromReader(bytes.NewReader(doubled))
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if err != nil {
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t.Fatalf("unexpected error digesting doubled content: %v", err)
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}
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n, err = fw.WriteAt(content, end)
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if err != nil {
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t.Fatalf("unexpected error writing content at %d: %v", end, err)
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}
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if n != len(content) {
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t.Fatalf("writeat was short: %d != %d", n, len(content))
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}
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fr, err = newFileReader(driver, path)
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if err != nil {
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t.Fatalf("unexpected error creating fileReader: %v", err)
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}
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defer fr.Close()
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verifier = digest.NewDigestVerifier(doubledgst)
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io.Copy(verifier, fr)
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if !verifier.Verified() {
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t.Fatalf("unable to verify write data")
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}
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// Check that WriteAt didn't update the offset.
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end, err = fw.Seek(0, os.SEEK_END)
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if err != nil {
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t.Fatalf("unexpected error seeking: %v", err)
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}
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if end != int64(len(content)) {
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t.Fatalf("write did not advance offset: %d != %d", end, len(content))
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}
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// Now, we copy from one path to another, running the data through the
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// fileReader to fileWriter, rather than the driver.Move command to ensure
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// everything is working correctly.
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fr, err = newFileReader(driver, path)
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if err != nil {
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t.Fatalf("unexpected error creating fileReader: %v", err)
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}
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defer fr.Close()
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fw, err = newFileWriter(driver, "/copied")
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if err != nil {
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t.Fatalf("unexpected error creating fileWriter: %v", err)
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}
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defer fw.Close()
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nn, err := io.Copy(fw, fr)
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if err != nil {
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t.Fatalf("unexpected error copying data: %v", err)
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}
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if nn != int64(len(doubled)) {
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t.Fatalf("unexpected copy length: %d != %d", nn, len(doubled))
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}
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fr, err = newFileReader(driver, "/copied")
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if err != nil {
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t.Fatalf("unexpected error creating fileReader: %v", err)
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}
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defer fr.Close()
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verifier = digest.NewDigestVerifier(doubledgst)
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io.Copy(verifier, fr)
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if !verifier.Verified() {
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t.Fatalf("unable to verify write data")
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}
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}
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