Use QtTest and QTimer.singleShot() to check the font dialog

Author: Lee Miller

src/bitmessageqt/tests/settings.py

@@ -2,10 +2,13 @@
 import threading
 import time
 
-from main import TestBase
+from PyQt4 import QtCore, QtGui, QtTest
+
 from bmconfigparser import config
 from bitmessageqt import settings
 
+from .main import TestBase
+
 
 class TestSettings(TestBase):
     """A test case for the "Settings" dialog"""
@@ -41,13 +44,34 @@ def test_styling(self):
         self.assertIs(font_setting, None)
         style_control = self.dialog.comboBoxStyle
         self.assertEqual(style_control.currentText(), 'GTK+')
+
+        def call_font_dialog():
+            """A function to get the open font dialog and accept it"""
+            font_dialog = QtGui.QApplication.activeModalWidget()
+            self.assertTrue(isinstance(font_dialog, QtGui.QFontDialog))
+            selected_font = font_dialog.currentFont()
+            self.assertEqual(
+                config.safeGet('bitmessagesettings', 'font'), '{},{}'.format(
+                    selected_font.family(), selected_font.pointSize()))
+
+            font_dialog.accept()
+            self.dialog.accept()
+            self.assertEqual(
+                config.safeGet('bitmessagesettings', 'windowstyle'),
+                style_control.currentText())
+
+        def click_font_button():
+            """Use QtTest to click the button"""
+            QtTest.QTest.mouseClick(
+                self.dialog.buttonFont, QtCore.Qt.LeftButton)
+
         style_count = style_control.count()
         self.assertGreater(style_count, 1)
         for i in range(style_count):
             if i != style_control.currentIndex():
                 style_control.setCurrentIndex(i)
                 break
-        self.dialog.accept()
-        self.assertEqual(
-            config.safeGet('bitmessagesettings', 'windowstyle'),
-            style_control.currentText())
+
+        QtCore.QTimer.singleShot(30, click_font_button)
+        QtCore.QTimer.singleShot(60, call_font_dialog)
+        time.sleep(2)