Handle HIDRAW devices that have no parents in the udev stack (BugFix) (…

…#1418)

* Only test parents of hidraw device if they exist

The parser "HID devices if nothing else is known to be
an input device on the same udev subtree" and hence tries to check
the stack of devices seen by udev, but it appears we are now
encountering hidraw devices with no parents

checkbox-support/checkbox_support/parsers/tests/test_udevadm.py

@@ -690,6 +690,11 @@ def test_LENOVO_T420(self):
         self.assertEqual(self.count(devices, "NETWORK"), 1)
         self.verify_devices(devices, expected_devices)
 
+    def test_HP_ELITEBOOK_835_13_INCH_G10(self):
+        devices = self.parse("HP_ELITEBOOK_835_13_INCH_G10")
+        self.assertEqual(len(devices), 156)
+        self.assertEqual(self.count(devices, "HIDRAW"), 1)
+
     def test_HP_ENVY_15_MEDIATEK_BT(self):
         devices = self.parse("HP_ENVY_15_MEDIATEK_BT")
         expected_devices = [

checkbox-support/checkbox_support/parsers/tests/udevadm_data/HP_ELITEBOOK_835_13_INCH_G10.lsblk

@@ -0,0 +1,14 @@
+KNAME="loop0" TYPE="loop" MOUNTPOINT="/snap/snapd/20092"
+KNAME="loop1" TYPE="loop" MOUNTPOINT="/snap/core22/864"
+KNAME="loop2" TYPE="loop" MOUNTPOINT="/snap/bare/5"
+KNAME="loop3" TYPE="loop" MOUNTPOINT="/snap/firefox/3131"
+KNAME="loop4" TYPE="loop" MOUNTPOINT="/snap/gnome-42-2204/126"
+KNAME="loop5" TYPE="loop" MOUNTPOINT="/snap/gtk-common-themes/1535"
+KNAME="loop6" TYPE="loop" MOUNTPOINT="/snap/snap-store/959"
+KNAME="loop7" TYPE="loop" MOUNTPOINT="/snap/snapd-desktop-integration/83"
+KNAME="sda" TYPE="disk" MOUNTPOINT=""
+KNAME="sda1" TYPE="part" MOUNTPOINT="/media/ubuntu/4526-3FDB"
+KNAME="nvme0n1" TYPE="disk" MOUNTPOINT=""
+KNAME="nvme0n1p1" TYPE="part" MOUNTPOINT="/boot/efi"
+KNAME="nvme0n1p2" TYPE="part" MOUNTPOINT=""
+KNAME="nvme0n1p3" TYPE="part" MOUNTPOINT="/"