Add simple tests for QtWebEngine renderer crash/kill

pytest.ini

@@ -23,6 +23,7 @@ markers =
     qtwebengine_osx_xfail: Tests which fail on OS X with QtWebEngine
     js_prompt: Tests needing to display a javascript prompt
     this: Used to mark tests during development
+    no_invalid_lines: Don't fail on unparseable lines in end2end tests
 qt_log_level_fail = WARNING
 qt_log_ignore =
     ^SpellCheck: .*

tests/end2end/features/misc.feature

@@ -641,3 +641,15 @@ Feature: Various utility commands.
     Scenario: Trying to enter command mode with :enter-mode
         When I run :enter-mode command
         Then the error "Mode command can't be entered manually!" should be shown
+
+    ## Renderer crashes
+
+    @qtwebkit_skip @no_invalid_lines
+    Scenario: Renderer crash
+        When I run :open -t chrome://crash
+        Then the error "Renderer process crashed" should be shown
+
+    @qtwebkit_skip @no_invalid_lines
+    Scenario: Renderer kill
+        When I run :open -t chrome://kill
+        Then the error "Renderer process was killed" should be shown

tests/end2end/fixtures/quteprocess.py

@@ -244,7 +244,8 @@ class QuteProc(testprocess.Process):
             if not line.strip():
                 return None
             elif (is_ignored_qt_message(line) or
-                  is_ignored_lowlevel_message(line)):
+                  is_ignored_lowlevel_message(line) or
+                  self.request.node.get_marker('no_invalid_lines')):
                 return None
             else:
                 raise