mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
572ce80230
This commit adds a transfer manager which deduplicates and schedules transfers, and also an upload manager and download manager that build on top of the transfer manager to provide high-level interfaces for uploads and downloads. The push and pull code is modified to use these building blocks. Some benefits of the changes: - Simplification of push/pull code - Pushes can upload layers concurrently - Failed downloads and uploads are retried after backoff delays - Cancellation is supported, but individual transfers will only be cancelled if all pushes or pulls using them are cancelled. - The distribution code is decoupled from Docker Engine packages and API conventions (i.e. streamformatter), which will make it easier to split out. This commit also includes unit tests for the new distribution/xfer package. The tests cover 87.8% of the statements in the package. Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
94 lines
2.4 KiB
Go
94 lines
2.4 KiB
Go
package ioutils
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import (
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"fmt"
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"io/ioutil"
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"strings"
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"testing"
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"time"
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"golang.org/x/net/context"
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)
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// Implement io.Reader
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type errorReader struct{}
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func (r *errorReader) Read(p []byte) (int, error) {
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return 0, fmt.Errorf("Error reader always fail.")
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}
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func TestReadCloserWrapperClose(t *testing.T) {
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reader := strings.NewReader("A string reader")
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wrapper := NewReadCloserWrapper(reader, func() error {
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return fmt.Errorf("This will be called when closing")
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})
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err := wrapper.Close()
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if err == nil || !strings.Contains(err.Error(), "This will be called when closing") {
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t.Fatalf("readCloserWrapper should have call the anonymous func and thus, fail.")
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}
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}
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func TestReaderErrWrapperReadOnError(t *testing.T) {
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called := false
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reader := &errorReader{}
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wrapper := NewReaderErrWrapper(reader, func() {
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called = true
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})
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_, err := wrapper.Read([]byte{})
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if err == nil || !strings.Contains(err.Error(), "Error reader always fail.") {
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t.Fatalf("readErrWrapper should returned an error")
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}
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if !called {
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t.Fatalf("readErrWrapper should have call the anonymous function on failure")
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}
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}
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func TestReaderErrWrapperRead(t *testing.T) {
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reader := strings.NewReader("a string reader.")
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wrapper := NewReaderErrWrapper(reader, func() {
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t.Fatalf("readErrWrapper should not have called the anonymous function")
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})
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// Read 20 byte (should be ok with the string above)
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num, err := wrapper.Read(make([]byte, 20))
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if err != nil {
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t.Fatal(err)
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}
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if num != 16 {
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t.Fatalf("readerErrWrapper should have read 16 byte, but read %d", num)
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}
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}
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func TestHashData(t *testing.T) {
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reader := strings.NewReader("hash-me")
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actual, err := HashData(reader)
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if err != nil {
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t.Fatal(err)
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}
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expected := "sha256:4d11186aed035cc624d553e10db358492c84a7cd6b9670d92123c144930450aa"
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if actual != expected {
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t.Fatalf("Expecting %s, got %s", expected, actual)
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}
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}
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type perpetualReader struct{}
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func (p *perpetualReader) Read(buf []byte) (n int, err error) {
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for i := 0; i != len(buf); i++ {
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buf[i] = 'a'
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}
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return len(buf), nil
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}
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func TestCancelReadCloser(t *testing.T) {
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ctx, _ := context.WithTimeout(context.Background(), 100*time.Millisecond)
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cancelReadCloser := NewCancelReadCloser(ctx, ioutil.NopCloser(&perpetualReader{}))
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for {
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var buf [128]byte
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_, err := cancelReadCloser.Read(buf[:])
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if err == context.DeadlineExceeded {
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break
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} else if err != nil {
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t.Fatalf("got unexpected error: %v", err)
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}
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}
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}
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