Add basic testing of wxagg backend.

anntzer · anntzer · commit a2664e078b85 · 2017-05-27T15:17:13.000-07:00
wxPython provides Trusty wheels, so use them.
diff --git a/.travis.yml b/.travis.yml
@@ -123,10 +123,20 @@ install:
         pyparsing!=2.1.6 \
         python-dateutil \
         sphinx
-    # GUI toolkits are pip-installable only for some versions of Python so don't
-    # fail if we can't install them.
-    pip install pyqt5 || true
-    python -c 'import PyQt5.QtCore' || true
+    # GUI toolkits are pip-installable only for some versions of Python so
+    # don't fail if we can't install them.  Make it easier to check whether the
+    # install was successful by trying to import the toolkit (sometimes, the
+    # install appears to be successful but shared libraries cannot be loaded at
+    # runtime, so an actual import is a better check).
+    pip install pyqt5 &&
+      python -c 'import PyQt5.QtCore' ||
+      true
+    pip install -U --pre \
+      -f https://wxpython.org/Phoenix/release-extras/linux/gtk3/ubuntu-14.04 \
+      wxPython &&
+      python -c 'import wx' ||
+      true
+
     if [[ $BUILD_DOCS == true ]]; then
       pip install $PRE -r doc-requirements.txt
     fi
diff --git a/lib/matplotlib/tests/test_backends_interactive.py b/lib/matplotlib/tests/test_backends_interactive.py
@@ -29,7 +29,8 @@ def _get_available_backends():
                 reason="Could not import {!r}".format(module_name))(backend)
             for module_name, backend in [
                 ("PyQt5", "qt5agg"),
-                ("tkinter", "tkagg")]]
+                ("tkinter", "tkagg"),
+                ("wx", "wxagg")]]
 
 
 _test_script = """\
