bdd: Skip JS prompt() tests on PyQt < 5.3.1.

Those versions had a PyQt bug when overloading javaScriptPrompt, so we don't do
that there.

pytest.ini

@@ -12,6 +12,7 @@ markers =
     frozen: Tests which can only be run if sys.frozen is True.
     integration: Tests which test a bigger portion of code, run without coverage.
     skip: Always skipped test.
+    pyqt531_or_newer: Needs PyQt 5.3.1 or newer.
 flakes-ignore =
     UnusedImport
     UnusedVariable

tests/conftest.py

@@ -39,7 +39,7 @@ from helpers.messagemock import message_mock
 from qutebrowser.config import config
 from qutebrowser.utils import objreg
 
-from PyQt5.QtCore import QEvent, QSize, Qt
+from PyQt5.QtCore import QEvent, QSize, Qt, PYQT_VERSION
 from PyQt5.QtWidgets import QWidget, QHBoxLayout, QVBoxLayout
 from PyQt5.QtNetwork import QNetworkCookieJar
 import xvfbwrapper
@@ -66,6 +66,8 @@ def _apply_platform_markers(item):
         ('not_xvfb', item.config.xvfb_display is not None,
             "Can't be run with Xvfb."),
         ('skip', True, "Always skipped."),
+        ('pyqt531_or_newer', PYQT_VERSION < 0x050301,
+            "Needs PyQt 5.3.1 or newer"),
     ]
 
     for searched_marker, condition, default_reason in markers:

tests/integration/features/prompts.feature

@@ -6,28 +6,6 @@ Feature: Prompts
 
     # Javascript
 
-    Scenario: Javascript prompt
-        When I open data/prompt/jsprompt.html
-        And I click the button
-        And I press the keys "prompt test"
-        And I run :prompt-accept
-        Then the javascript message "Prompt reply: prompt test" should be logged
-
-    Scenario: Rejected javascript prompt
-        When I open data/prompt/jsprompt.html
-        And I click the button
-        And I press the keys "prompt test"
-        And I run :leave-mode
-        Then the javascript message "Prompt reply: null" should be logged
-
-    Scenario: Using content -> ignore-javascript-prompt
-        When I set content -> ignore-javascript-prompt to true
-        And I open data/prompt/jsprompt.html
-        # Can't use "I click the button" as it waits for a key mode change
-        And I run :hint
-        And I run :follow-hint a
-        Then the javascript message "Prompt reply: null" should be logged
-
     Scenario: Javascript alert
         When I open data/prompt/jsalert.html
         And I click the button
@@ -59,3 +37,28 @@ Feature: Prompts
         And I click the button
         And I run :leave-mode
         Then the javascript message "confirm reply: false" should be logged
+
+    @pyqt531_or_newer
+    Scenario: Javascript prompt
+        When I open data/prompt/jsprompt.html
+        And I click the button
+        And I press the keys "prompt test"
+        And I run :prompt-accept
+        Then the javascript message "Prompt reply: prompt test" should be logged
+
+    @pyqt531_or_newer
+    Scenario: Rejected javascript prompt
+        When I open data/prompt/jsprompt.html
+        And I click the button
+        And I press the keys "prompt test"
+        And I run :leave-mode
+        Then the javascript message "Prompt reply: null" should be logged
+
+    @pyqt531_or_newer
+    Scenario: Using content -> ignore-javascript-prompt
+        When I set content -> ignore-javascript-prompt to true
+        And I open data/prompt/jsprompt.html
+        # Can't use "I click the button" as it waits for a key mode change
+        And I run :hint
+        And I run :follow-hint a
+        Then the javascript message "Prompt reply: null" should be logged