Clear the font caches on every test. This should prevent problems whe…

…re setting font properties will leak over into another test.
matplotlib · mdboom · Sep 19, 2013 · Sep 18, 2013 · Sep 18, 2013 · 9eda53b2fc1bd3eba48e7e37f9829794ab416b12
commit 9eda53b2fc1bd3eba48e7e37f9829794ab416b12
diff --git a/lib/matplotlib/tests/__init__.py b/lib/matplotlib/tests/__init__.py
@@ -3,6 +3,8 @@

 import difflib

+from matplotlib import rcParams, rcdefaults, use
+

 _multiprocess_can_split_ = True

@@ -12,6 +14,7 @@ def setup():
    # it during all of the tests.
    import locale
    import warnings
+    from matplotlib.backends import backend_agg, backend_pdf, backend_svg

    try:
        locale.setlocale(locale.LC_ALL, str('en_US.UTF-8'))
@@ -28,11 +31,17 @@ def setup():
    # These settings *must* be hardcoded for running the comparison
    # tests and are not necessarily the default values as specified in
    # rcsetup.py
-    rcdefaults() # Start with all defaults
+    rcdefaults()  # Start with all defaults
    rcParams['font.family'] = 'Bitstream Vera Sans'
    rcParams['text.hinting'] = False
    rcParams['text.hinting_factor'] = 8

+    # Clear the font caches.  Otherwise, the hinting mode can travel
+    # from one test to another.
+    backend_agg.RendererAgg._fontd.clear()
+    backend_pdf.RendererPdf.truetype_font_cache.clear()
+    backend_svg.RendererSVG.fontd.clear()
+

 def assert_str_equal(reference_str, test_str,
                     format_str='String {str1} and {str2} do not match:\n{differences}'):