Minor updates to plotsaver tests for compatability

Changes in matplotlib 2.2 require doubles for sizes
and setting the font manually avoids any issues if
fonts are not available on all platforms.
Refs #27631

qt/python/mantidqt/project/test/test_plotssaver.py

@@ -9,7 +9,6 @@
 from __future__ import (absolute_import, division, print_function, unicode_literals)
 
 import matplotlib
-import platform
 import unittest
 
 from mantid.api import AnalysisDataService as ADS
@@ -33,11 +32,11 @@ class PlotsSaverTest(unittest.TestCase):
                                                         u'background_color': u'#ffffff',
                                                         u'edge_color': u'#000000',
                                                         u'transparency': 0.5,
-                                                        u'entries_font': u'Bitstream Vera Sans',
-                                                        u'entries_size': 10,
+                                                        u'entries_font': u'DejaVu Sans',
+                                                        u'entries_size': 10.0,
                                                         u'entries_color': u'#000000',
-                                                        u'title_font': u'Bitstream Vera Sans',
-                                                        u'title_size': 12,
+                                                        u'title_font': u'DejaVu Sans',
+                                                        u'title_size': 12.0,
                                                         u'title_color': u'#000000',
                                                         u'marker_size': 2.0,
                                                         u'box_visible': True,
@@ -128,11 +127,6 @@ class PlotsSaverTest(unittest.TestCase):
 
         self.loader_plot_dict[u'creationArguments'] = [[{u"specNum": 2, "function": "plot"}]]
 
-        # The original font isn't available on Windows so it has to be changed.
-        if platform.system() == "Windows":
-            self.loader_plot_dict[u'axes'][0][u'legend'][u'entries_font'] = 'DejaVu Sans'
-            self.loader_plot_dict[u'axes'][0][u'legend'][u'title_font'] = 'DejaVu Sans'
-
         self.maxDiff = None
         self.assertDictEqual(return_value, self.loader_plot_dict)
 
@@ -142,11 +136,6 @@ class PlotsSaverTest(unittest.TestCase):
 
         expected_value = self.loader_plot_dict["axes"][0]
 
-        # The original font isn't available on Windows so it has to be changed.
-        if platform.system() == "Windows":
-            self.loader_plot_dict[u'axes'][0][u'legend'][u'entries_font'] = 'DejaVu Sans'
-            self.loader_plot_dict[u'axes'][0][u'legend'][u'title_font'] = 'DejaVu Sans'
-
         self.maxDiff = None
         self.assertDictEqual(return_value, expected_value)