Skip know failures for wx on macOS

Author: itziakos

chaco/plots/tests/test_image_plot.py

@@ -9,10 +9,9 @@
 # Thanks for using Enthought open source!
 
 import os
-
+import platform
 import tempfile
 from contextlib import contextmanager
-
 import unittest
 
 import numpy as np
@@ -207,6 +206,9 @@ def test_map_screen(self):
 
     # regression test for enthought/chaco#528
     @unittest.skipIf(is_null, "Skip on 'null' toolkit")
+    @unittest.skipIf(
+        ETSConfig.toolkit == "wx" and platform.system() == 'Darwin',
+        "Test does not work correctly on wx; https://github.com/enthought/chaco/issues/919")
     def test_resize_to_zero(self):
         class TestResize(HasTraits):
             plot = Instance(Component)

chaco/tests/test_plot.py

@@ -9,6 +9,7 @@
 # Thanks for using Enthought open source!
 
 import unittest
+import platform
 
 import numpy as np
 from numpy import arange, array
@@ -171,6 +172,10 @@ def _plot_default(self):
 @unittest.skipIf(ETSConfig.toolkit == "null", "Skip on 'null' toolkit")
 class TestEmptyPlot(unittest.TestCase, EnableTestAssistant):
 
+
+    @unittest.skipIf(
+        ETSConfig.toolkit == "wx" and platform.system() == 'Darwin',
+        "Test does not work correctly on wx; https://github.com/enthought/chaco/issues/919")
     def test_dont_crash_on_click(self):
         from traitsui.testing.api import UITester
         tester = UITester()

chaco/tools/tests/test_cursor_tool.py

@@ -8,6 +8,7 @@
 #
 # Thanks for using Enthought open source!
 import unittest
+import platform
 
 import numpy as np
 
@@ -26,6 +27,9 @@ class TestCursorTool(unittest.TestCase, EnableTestAssistant):
 
     # regression test for enthought/chaco#289
     @unittest.skipIf(ETSConfig.toolkit == "null", "Skip on 'null' toolkit")
+    @unittest.skipIf(
+        ETSConfig.toolkit == "wx" and platform.system() == 'Darwin',
+        "Test does not work correctly on wx; https://github.com/enthought/chaco/issues/919")
     def test_use_with_log_mappers(self):
         class TestCursor(HasTraits):
             plot = Instance(Plot)