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// Copyright 2025 The Prometheus Authors
// 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.
//go:build linux
// +build linux
package sysfs
import (
"testing"
"github.com/google/go-cmp/cmp"
)
func TestPciDevices(t *testing.T) {
fs, err := NewFS(sysTestFixtures)
if err != nil {
t.Fatal(err)
}
got, err := fs.PciDevices()
if err != nil {
t.Fatal(err)
}
var (
LinkSpeed8GTs = 8.0
LinkWidth4 = 4.0
LinkWidth8 = 8.0
)
want := PciDevices{
"0000:00:02:1": PciDevice{
Location: PciDeviceLocation{
Segment: 0,
Bus: 0,
Device: 2,
Function: 1,
},
ParentLocation: nil,
Class: 0x060400,
Vendor: 0x1022,
Device: 0x1634,
SubsystemVendor: 0x17aa,
SubsystemDevice: 0x5095,
Revision: 0x00,
MaxLinkSpeed: &LinkSpeed8GTs,
MaxLinkWidth: &LinkWidth8,
CurrentLinkSpeed: &LinkSpeed8GTs,
CurrentLinkWidth: &LinkWidth4,
},
"0000:01:00:0": PciDevice{
Location: PciDeviceLocation{
Segment: 0,
Bus: 1,
Device: 0,
Function: 0,
},
ParentLocation: &PciDeviceLocation{
Segment: 0,
Bus: 0,
Device: 2,
Function: 1,
},
Class: 0x010802,
Vendor: 0xc0a9,
Device: 0x540a,
SubsystemVendor: 0xc0a9,
SubsystemDevice: 0x5021,
Revision: 0x01,
MaxLinkSpeed: &LinkSpeed8GTs,
MaxLinkWidth: &LinkWidth4,
CurrentLinkSpeed: &LinkSpeed8GTs,
CurrentLinkWidth: &LinkWidth4,
},
}
if diff := cmp.Diff(want, got); diff != "" {
t.Fatalf("unexpected PciDevices (-want +got):\n%s", diff)
}
}
func TestParseDeviceLocation(t *testing.T) {
got, err := parsePciDeviceLocation("0001:9b:0c.0")
if err != nil {
t.Fatal(err)
}
want := &PciDeviceLocation{
Segment: 1,
Bus: 0x9b,
Device: 0xc,
Function: 0,
}
if diff := cmp.Diff(want, got); diff != "" {
t.Fatalf("unexpected location (-want +got):\n%s", diff)
}
}
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