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// Copyright 2017 the gousb Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package gousb
import "testing"
func TestEndpointReadStream(t *testing.T) {
t.Parallel()
lib := newFakeLibusb()
ctx := newContextWithImpl(lib)
defer func() {
if err := ctx.Close(); err != nil {
t.Errorf("Context.Close: %v", err)
}
}()
goodTransfers := 7
done := make(chan struct{})
go func() {
var num int
for {
xfr := lib.waitForSubmitted(done)
if xfr == nil {
return
}
if num < goodTransfers {
xfr.setData(make([]byte, len(xfr.buf)))
xfr.setStatus(TransferCompleted)
} else {
xfr.setStatus(TransferError)
}
num++
}
}()
dev, err := ctx.OpenDeviceWithVIDPID(0x9999, 0x0001)
if err != nil {
t.Fatalf("OpenDeviceWithVIDPID(9999, 0001): %v", err)
}
defer dev.Close()
cfg, err := dev.Config(1)
if err != nil {
t.Fatalf("%s.Config(1): %v", dev, err)
}
defer cfg.Close()
intf, err := cfg.Interface(0, 0)
if err != nil {
t.Fatalf("%s.Interface(0, 0): %v", cfg, err)
}
defer intf.Close()
ep, err := intf.InEndpoint(2)
if err != nil {
t.Fatalf("%s.Endpoint(2): %v", intf, err)
}
stream, err := ep.NewStream(1024, 5)
if err != nil {
t.Fatalf("%s.NewStream(1024, 5): %v", ep, err)
}
defer stream.Close()
var got int
want := goodTransfers * 512 // EP max packet size is 512
buf := make([]byte, 1024)
for got <= want {
num, err := stream.Read(buf)
if err != nil {
break
}
got += num
}
if got != want {
t.Errorf("stream.Read(): read %d bytes, want %d", got, want)
}
close(done)
}
func TestEndpointWriteStream(t *testing.T) {
t.Parallel()
lib := newFakeLibusb()
ctx := newContextWithImpl(lib)
defer func() {
if err := ctx.Close(); err != nil {
t.Errorf("Context.Close: %v", err)
}
}()
done := make(chan struct{})
total := 0
num := 0
go func() {
for {
xfr := lib.waitForSubmitted(done)
if xfr == nil {
return
}
xfr.setData(make([]byte, len(xfr.buf)))
xfr.setStatus(TransferCompleted)
num++
total += xfr.length
}
}()
dev, err := ctx.OpenDeviceWithVIDPID(0x9999, 0x0001)
if err != nil {
t.Fatalf("OpenDeviceWithVIDPID(9999, 0001): %v", err)
}
defer dev.Close()
cfg, err := dev.Config(1)
if err != nil {
t.Fatalf("%s.Config(1): %v", dev, err)
}
defer cfg.Close()
intf, err := cfg.Interface(0, 0)
if err != nil {
t.Fatalf("%s.Interface(0, 0): %v", cfg, err)
}
defer intf.Close()
ep, err := intf.OutEndpoint(1)
if err != nil {
t.Fatalf("%s.Endpoint(1): %v", intf, err)
}
bufSize := 1024
stream, err := ep.NewStream(bufSize, 5)
if err != nil {
t.Fatalf("%s.NewStream(%d, 5): %v", ep, bufSize, err)
}
defer stream.Close()
for i := 0; i < 5; i++ {
if n, err := stream.Write(make([]byte, bufSize*2)); err != nil {
t.Fatalf("stream.Write: got error %v", err)
} else if n != bufSize*2 {
t.Fatalf("stream.Write: %d, want %d", n, bufSize*2)
}
}
if err := stream.Close(); err != nil {
t.Fatalf("stream.Close: got error %v", err)
}
if got, want := stream.Written(), 10240; got != want { // 5 stream.Writes, each with 2048 bytes
t.Errorf("stream.Written: got %d, want %d", got, want)
}
done <- struct{}{}
if w := stream.Written(); total != w {
t.Errorf("received data: got %d, but stream.Written returned %d, results should be identical", total, w)
}
if wantXfers := 20; num != wantXfers { // transferred 10240 bytes, device max packet size is 512
t.Errorf("received transfers: got %d, want %d", num, wantXfers)
}
}
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