[checkbox-ce-oem] Add a test for splash screen (New)

contrib/checkbox-ce-oem/checkbox-provider-ce-oem/units/gadget/jobs.pxu

@@ -73,3 +73,22 @@ requires:
 category_id: com.canonical.certification::gadget
 estimated_duration: 5s
 command: check_gadget_interface.py --type {type} --name {name} --interface {interface}
+
+unit: job
+id: ce-oem-gadget/splash-screen
+category_id: com.canonical.certification::gadget
+_summary: Check if the splash screen appears
+_purpose: Reboot the tested machine and check if splash screen appears
+_steps:
+    - "The machine will reboot."
+    - "Check if the splash screen appears."
+    - "If running locally, start Checkbox again after reboot."
+    - "Press R to resume the test and select pass (P) if splash screen appeared or fail (F) if splash screen did not appear."
+plugin: user-interact
+user: root
+flags: preserve-locale noreturn autorestart
+imports: from com.canonical.plainbox import manifest
+requires:
+  manifest.has_gadget_splashscreen == 'True'
+command:
+  dbus-send --system --print-reply --dest=org.freedesktop.login1 /org/freedesktop/login1 "org.freedesktop.login1.Manager.Reboot" boolean:true

contrib/checkbox-ce-oem/checkbox-provider-ce-oem/units/gadget/manifest.pxu

@@ -3,3 +3,8 @@ id: need_gadget_interface_test
 _name: Gadget
 _promt: Does platform have plugs and slots been defined in Gadget snap and need to be verify?
 value-type: bool
+
+unit: manifest entry
+id: has_gadget_splashscreen
+_name: Is splash screen enabled?
+value-type: bool

contrib/checkbox-ce-oem/checkbox-provider-ce-oem/units/gadget/test-plan.pxu

@@ -12,6 +12,7 @@ unit: test plan
 _name: gadget related manual tests
 _description: Manual gadget related tests for devices
 include:
+    ce-oem-gadget/splash-screen
 
 id: ce-oem-gadget-automated
 unit: test plan