fpga tests cleanup

- used t.Run api for better visibility
- used ioutil.TempDir to create temporary directories

Signed-off-by: Ed Bartosh <eduard.bartosh@intel.com>

cmd/fpga_plugin/dfl_test.go

@@ -15,13 +15,12 @@
 package main
 
 import (
-	"fmt"
+	"io/ioutil"
 	"os"
 	"path"
 	"reflect"
 	"strings"
 	"testing"
-	"time"
 
 	dpapi "github.com/intel/intel-device-plugins-for-kubernetes/pkg/deviceplugin"
 	pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
@@ -48,10 +47,15 @@ func TestNewDevicePluginDFL(t *testing.T) {
 	}
 
 	for _, tcase := range tcases {
+		t.Run(tcase.mode, func(t *testing.T) {
 			_, err := newDevicePluginDFL("", "", tcase.mode)
 			if tcase.expectedErr && err == nil {
-			t.Error("No error generated when creating Cache with invalid parameters")
+				t.Error("Unexpected success")
 			}
+			if !tcase.expectedErr && err != nil {
+				t.Errorf("Unexpected error: %+v", err)
+			}
+		})
 	}
 }
 
@@ -282,7 +286,10 @@ func TestGetAfuTreeDFL(t *testing.T) {
 }
 
 func TestScanFPGAsDFL(t *testing.T) {
-	tmpdir := fmt.Sprintf("/tmp/fpgaplugin-TestDiscoverFPGAs-%d", time.Now().Unix())
+	tmpdir, err := ioutil.TempDir("", "TestScanFPGAsDFL")
+	if err != nil {
+		t.Fatalf("can't create temporary directory: %+v", err)
+	}
 	sysfs := path.Join(tmpdir, "sys", "class", "fpga_region")
 	devfs := path.Join(tmpdir, "dev")
 	tcases := []struct {
@@ -490,6 +497,7 @@ func TestScanFPGAsDFL(t *testing.T) {
 	}
 
 	for _, tcase := range tcases {
+		t.Run(tcase.name, func(t *testing.T) {
 			err := createTestDirs(devfs, sysfs, tcase.devfsdirs, tcase.sysfsdirs, tcase.sysfsfiles)
 			if err != nil {
 				t.Fatalf("%+v", err)
@@ -497,8 +505,8 @@ func TestScanFPGAsDFL(t *testing.T) {
 
 			plugin, err := newDevicePluginDFL(sysfs, devfs, tcase.mode)
 			if err != nil {
-			t.Errorf("Test case '%s': %+v", tcase.name, err)
+				t.Errorf("error creating DFL plugin: %+v", err)
-			continue
+				return
 			}
 			plugin.getDevTree = func(devices []device) dpapi.DeviceTree {
 				return dpapi.NewDeviceTree()
@@ -507,15 +515,16 @@ func TestScanFPGAsDFL(t *testing.T) {
 			_, err = plugin.scanFPGAs()
 			if tcase.errorContains != "" {
 				if err == nil || !strings.Contains(err.Error(), tcase.errorContains) {
-				t.Errorf("Test case '%s': expected error '%s', but got '%v'", tcase.name, tcase.errorContains, err)
+					t.Errorf("expected error '%s', but got '%v'", tcase.errorContains, err)
 				}
 			} else if err != nil {
-			t.Errorf("Test case '%s': expected no error, but got '%+v'", tcase.name, err)
+				t.Errorf("expected no error, but got '%+v'", err)
 			}
 
 			err = os.RemoveAll(tmpdir)
 			if err != nil {
 				t.Fatal(err)
 			}
+		})
 	}
 }

cmd/fpga_plugin/opae_test.go

@@ -15,13 +15,12 @@
 package main
 
 import (
-	"fmt"
+	"io/ioutil"
 	"os"
 	"path"
 	"reflect"
 	"strings"
 	"testing"
-	"time"
 
 	dpapi "github.com/intel/intel-device-plugins-for-kubernetes/pkg/deviceplugin"
 	pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
@@ -48,10 +47,15 @@ func TestNewDevicePluginOPAE(t *testing.T) {
 	}
 
 	for _, tcase := range tcases {
+		t.Run(tcase.mode, func(t *testing.T) {
 			_, err := newDevicePluginOPAE("", "", tcase.mode)
 			if tcase.expectedErr && err == nil {
-			t.Error("No error generated when creating Cache with invalid parameters")
+				t.Error("Unexpected success")
 			}
+			if !tcase.expectedErr && err != nil {
+				t.Errorf("Unexpected error: %+v", err)
+			}
+		})
 	}
 }
 
@@ -233,7 +237,10 @@ func TestGetAfuTreeOPAE(t *testing.T) {
 }
 
 func TestScanFPGAsOPAE(t *testing.T) {
-	tmpdir := fmt.Sprintf("/tmp/fpgaplugin-TestDiscoverFPGAs-%d", time.Now().Unix())
+	tmpdir, err := ioutil.TempDir("", "TestScanFPGAsOPAE")
+	if err != nil {
+		t.Fatalf("can't create temporary directory: %+v", err)
+	}
 	sysfs := path.Join(tmpdir, "sys", "class", "fpga")
 	devfs := path.Join(tmpdir, "dev")
 	tcases := []struct {
@@ -353,6 +360,7 @@ func TestScanFPGAsOPAE(t *testing.T) {
 	}
 
 	for _, tcase := range tcases {
+		t.Run(tcase.name, func(t *testing.T) {
 			err := createTestDirs(devfs, sysfs, tcase.devfsdirs, tcase.sysfsdirs, tcase.sysfsfiles)
 			if err != nil {
 				t.Fatalf("%+v", err)
@@ -371,15 +379,16 @@ func TestScanFPGAsOPAE(t *testing.T) {
 			_, err = plugin.scanFPGAs()
 			if tcase.errorContains != "" {
 				if err == nil || !strings.Contains(err.Error(), tcase.errorContains) {
-				t.Errorf("Test case '%s': expected error '%s', but got '%v'", tcase.name, tcase.errorContains, err)
+					t.Errorf("expected error '%s', but got '%v'", tcase.errorContains, err)
 				}
 			} else if err != nil {
-			t.Errorf("Test case '%s': expected no error, but got '%+v'", tcase.name, err)
+				t.Errorf("expected no error, but got '%+v'", err)
 			}
 
 			err = os.RemoveAll(tmpdir)
 			if err != nil {
 				t.Fatal(err)
 			}
+		})
 	}
 }