// Copyright 2013 Google Inc. All rights reserved. // Copyright 2016 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 usb import "testing" func TestListDevices(t *testing.T) { orig := libusb defer func() { libusb = orig }() libusb = newFakeLibusb() c := NewContext() defer c.Close() c.Debug(0) descs := []*Descriptor{} devs, err := c.ListDevices(func(desc *Descriptor) bool { descs = append(descs, desc) return true }) defer func() { for _, d := range devs { d.Close() } }() if err != nil { t.Fatalf("ListDevices(): %s", err) } if got, want := len(devs), len(fakeDevices); got != want { t.Fatalf("len(devs) = %d, want %d (based on num fake devs)", got, want) } if got, want := len(devs), len(descs); got != want { t.Fatalf("len(devs) = %d, want %d (based on num opened devices)", got, want) } for i := range devs { if got, want := devs[i].Descriptor, descs[i]; got != want { t.Errorf("dev[%d].Descriptor = %p, want %p", i, got, want) } } } func TestOpenDeviceWithVidPid(t *testing.T) { orig := libusb defer func() { libusb = orig }() libusb = newFakeLibusb() for _, d := range []struct { vid, pid int exists bool }{ {0x7777, 0x0003, false}, {0x8888, 0x0001, false}, {0x8888, 0x0002, true}, {0x9999, 0x0001, true}, {0x9999, 0x0002, false}, } { c := NewContext() dev, err := c.OpenDeviceWithVidPid(d.vid, d.pid) if (dev != nil) != d.exists { t.Errorf("OpenDeviceWithVidPid(%s/%s): device != nil is %v, want %v", ID(d.vid), ID(d.pid), dev != nil, d.exists) } if err != nil { t.Errorf("OpenDeviceWithVidPid(%s/%s): got error %v, want nil", ID(d.vid), ID(d.pid), err) } if dev != nil { if dev.Descriptor.Vendor != ID(d.vid) || dev.Descriptor.Product != ID(d.pid) { t.Errorf("OpenDeviceWithVidPid(%s/%s): the device returned has VID/PID %s/%s, different from specified in the arguments", ID(d.vid), ID(d.pid), dev.Descriptor.Vendor, dev.Descriptor.Product) } dev.Close() } } }