Test if stdin gets closed when starting QProcess

tests/end2end/data/userscripts/test_stdinclose.py

@@ -0,0 +1,7 @@
+#!/usr/bin/python3
+
+import sys
+import os
+sys.stdin.read()
+with open(os.environ['QUTE_FIFO'], 'wb') as fifo:
+    fifo.write(b':message-info "stdin closed"\n')

tests/end2end/features/spawn.feature

@@ -55,3 +55,8 @@ Feature: :spawn
         Then the following tabs should be open:
             - about:blank
             - about:blank (active)
+
+    Scenario: Running :spawn with userscript that expects the stdin getting closed
+        When I open about:blank
+	And I run :spawn -u (testdata)/userscripts/test_stdinclose.py
+	Then "stdin closed" should be logged