77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
// Copyright 2017 the gousb Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gousb
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import (
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"bytes"
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"encoding/hex"
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"fmt"
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"io/ioutil"
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"os"
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"reflect"
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"testing"
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)
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func bytesFromHexFile(path string) ([]byte, error) {
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f, err := os.Open(path)
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if err != nil {
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return nil, fmt.Errorf("Open(): %v", err)
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}
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defer f.Close()
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hexData, err := ioutil.ReadAll(f)
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if err != nil {
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return nil, fmt.Errorf("ReadAll(): %v", err)
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}
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hexData = bytes.TrimSpace(hexData)
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if len(hexData)%2 == 1 {
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return nil, fmt.Errorf("hex data file has %d characters, expected an even number", len(hexData))
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}
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data := make([]byte, len(hexData)/2)
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_, err = hex.Decode(data, hexData)
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if err != nil {
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return nil, fmt.Errorf("failed to decode hex data: %v", err)
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}
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return data, nil
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}
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func TestDeviceDescriptor(t *testing.T) {
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path := "testdata/mouse_device_desc.hex"
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descData, err := bytesFromHexFile(path)
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if err != nil {
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t.Fatalf("loading data from %q failed: %v", path, err)
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}
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got, err := deviceDescFromBytes(descData)
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if err != nil {
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t.Fatalf("failed to decode device descriptor from %q: %v", path, err)
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}
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// based on device descriptor as presented in mouse_lsusb.txt
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want := &DeviceDesc{
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Spec: Version(2, 0),
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Class: ClassPerInterface,
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SubClass: ClassPerInterface,
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Protocol: Protocol(0),
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MaxControlPacketSize: 32,
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Vendor: ID(0x046d),
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Product: ID(0xc526),
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Device: Version(5, 0),
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Configs: make(map[int]ConfigDesc),
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}
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if !reflect.DeepEqual(got, want) {
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t.Errorf("Got descriptor: %+v\nwant: %+v", got, want)
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}
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}
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