test: add simple linux test for all function

Author: mengzhuo

vmdetect/linux_test.go

@@ -0,0 +1,45 @@
+//go:build linux
+// +build linux
+
+package vmdetect
+
+import (
+	"reflect"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+func getFunctionName(f interface{}) string {
+	fn := runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()
+	i := strings.LastIndex(fn, ".")
+	if i > 0 {
+		return fn[i:]
+	}
+	return fn
+}
+
+func TestCheckDMITable(t *testing.T) {
+	check := -1
+	for i, f := range []func() bool{
+		checkDMITable,
+		checkKernelRingBuffer,
+		checkUML,
+		checkSysInfo,
+		checkDeviceTree,
+		checkHypervisorType,
+		checkXenProcFile,
+		checkKernelModules,
+	} {
+		inVm := f()
+		t.Logf("%s:%v", getFunctionName(f), inVm)
+		if inVm && check == -1 {
+			check = i
+		}
+	}
+	inVM, msg := IsRunningInVirtualMachine()
+	t.Log(msg)
+	if check == -1 == inVM {
+		t.Errorf("check:%d, inVm:%v", check, inVM)
+	}
+}