allow to run unit-tests inside a container

Makefile

@@ -74,25 +74,25 @@ $(BUILDDIR)/$(BINARY_NAME): $(GOFILES) | $(BUILDDIR)
 	@cd $(BASE)/cmd/$(BINARY_NAME) && CGO_ENABLED=0 go build $(LDFLAGS) -o $(BUILDDIR)/$(BINARY_NAME) -tags no_openssl -v
 
 $(GOLINT): | $(BASE) ; $(info  building golint...)
-	$Q go install golang.org/x/lint/golint@latest
+	$(call go-install-tool,$(GOLINT),golang.org/x/lint/golint@latest)
 
 $(GOCOVMERGE): | $(BASE) ; $(info  building gocovmerge...)
-	$Q go install github.com/wadey/gocovmerge@latest
+	$(call go-install-tool,$(GOCOVMERGE),github.com/wadey/gocovmerge@latest)
 
 $(GOCOV): | $(BASE) ; $(info  building gocov...)
-	$Q go install github.com/axw/gocov/gocov@v1.1.0
+	$(call go-install-tool,$(GOCOV),github.com/axw/gocov/gocov@v1.1.0)
 
 $(GCOV2LCOV): | $(BASE) ; $(info  building gcov2lcov...)
-	$Q go install github.com/jandelgado/gcov2lcov@latest
+	$(call go-install-tool,$(GCOV2LCOV),github.com/jandelgado/gcov2lcov@latest)
 
 $(GOCOVXML): | $(BASE) ; $(info  building gocov-xml...)
-	$Q go install github.com/AlekSi/gocov-xml@latest
+	$(call go-install-tool,$(GOCOVXML),github.com/AlekSi/gocov-xml@latest)
 
 $(GO2XUNIT): | $(BASE) ; $(info  building go2xunit...)
-	$Q go install github.com/tebeka/go2xunit@latest
+	$(call go-install-tool,$(GO2XUNIT),github.com/tebeka/go2xunit@latest)
 
 $(GOMOCKERY): | $(BASE) ; $(info  building go2xunit...)
-	$Q go install github.com/vektra/mockery/v2@latest
+	$(call go-install-tool,$(GOMOCKERY),github.com/vektra/mockery/v2@latest)
 
 TEST_TARGETS := test-default test-bench test-short test-verbose test-race
 .PHONY: $(TEST_TARGETS) test-xml check test tests
@@ -166,3 +166,13 @@ mockery: | $(BASE) $(GOMOCKERY) ; $(info  Running mockery...) @ ## Run golint on
 help: ; @ ## Display this help message
 	@grep -E '^[ a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
 		awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-15s\033[0m %s\n", $$1, $$2}'
+
+
+# go-install-tool will 'go install' any package $2 and install it to $1.
+define go-install-tool
+@[ -f $(1) ] || { \
+set -e ;\
+echo "Downloading $(2)" ;\
+GOBIN=$(GOBIN) go install -mod=mod $(2) ;\
+}
+endef

pkg/infoprovider/vhostNetInfoProvider.go

@@ -26,6 +26,15 @@ import (
 	"github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/types"
 )
 
+var (
+	// HostNet variable for vhost-net device path
+	// used to check path for unit-tests
+	HostNet = "/dev/vhost-net"
+	// HostTun variable for tun device path
+	// used to check path for unit-tests
+	HostTun = "/dev/net/tun"
+)
+
 /*
 VhostNetInfoProvider wraps any DeviceInfoProvider and adds a vhost-net device
 */
@@ -39,7 +48,7 @@ func NewVhostNetInfoProvider() types.DeviceInfoProvider {
 
 // VhostNetDeviceExist returns true if /dev/vhost-net exists
 func VhostNetDeviceExist() bool {
-	_, err := os.Stat("/dev/vhost-net")
+	_, err := os.Stat(HostNet)
 	return err == nil
 }
 
@@ -57,7 +66,7 @@ func getVhostNetDeviceSpec() []*pluginapi.DeviceSpec {
 
 // TunDeviceExist returns true if /dev/net/tun exists
 func tunDeviceExist() bool {
-	_, err := os.Stat("/dev/net/tun")
+	_, err := os.Stat(HostTun)
 	return err == nil
 }
 

pkg/infoprovider/vhostNetInfoProvider_test.go

@@ -18,11 +18,15 @@
 package infoprovider_test
 
 import (
+	"path/filepath"
+
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
 	pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
 
 	"github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/infoprovider"
+	"github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/utils"
 )
 
 var _ = Describe("vdpaInfoProvider", func() {
@@ -35,6 +39,18 @@ var _ = Describe("vdpaInfoProvider", func() {
 	})
 	Describe("GetDeviceSpecs", func() {
 		It("should return correct specs for vhost net device", func() {
+			fakeFs := &utils.FakeFilesystem{
+				Dirs: []string{"/dev/net/"},
+				Files: map[string][]byte{
+					"/dev/vhost-net": nil,
+					"/dev/net/tun":   nil},
+			}
+			defer fakeFs.Use()()
+			//nolint: gocritic
+			infoprovider.HostNet = filepath.Join(fakeFs.RootDir, "/dev/vhost-net")
+			//nolint: gocritic
+			infoprovider.HostTun = filepath.Join(fakeFs.RootDir, "/dev/net/tun")
+
 			dip := infoprovider.NewVhostNetInfoProvider()
 			Expect(dip.GetDeviceSpecs()).To(Equal([]*pluginapi.DeviceSpec{
 				{

pkg/netdevice/pciNetDevice_test.go

@@ -15,13 +15,15 @@
 package netdevice_test
 
 import (
+	"path/filepath"
 	"testing"
 
 	"github.com/jaypipes/ghw"
 	"github.com/jaypipes/pcidb"
 	pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
 
 	"github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/factory"
+	"github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/infoprovider"
 	"github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/netdevice"
 	"github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/types"
 	"github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/types/mocks"
@@ -252,7 +254,11 @@ var _ = Describe("PciNetDevice", func() {
 					"sys/bus/pci/devices/0000:00:00.1",
 					"sys/kernel/iommu_groups/0",
 					"sys/bus/pci/drivers/vfio-pci",
-					// "dev/vhost-net", FIXME: /dev folder is not mocked
+					"dev/net",
+				},
+				Files: map[string][]byte{
+					"/dev/vhost-net": nil,
+					"/dev/net/tun":   nil,
 				},
 				Symlinks: map[string]string{
 					"sys/bus/pci/devices/0000:00:00.1/iommu_group": "../../../../kernel/iommu_groups/0",
@@ -266,6 +272,11 @@ var _ = Describe("PciNetDevice", func() {
 				defer fs.Use()()
 				utils.SetDefaultMockNetlinkProvider()
 
+				//nolint: gocritic
+				infoprovider.HostNet = filepath.Join(fs.RootDir, "/dev/vhost-net")
+				//nolint: gocritic
+				infoprovider.HostTun = filepath.Join(fs.RootDir, "/dev/net/tun")
+
 				dev, err := netdevice.NewPciNetDevice(in, f, rc, vhost_net_selector_index)
 
 				Expect(dev.GetDriver()).To(Equal("vfio-pci"))