Add a test for find_tex_file(..., format=...)

jkseppan · jkseppan · commit c68e6ebd2a9d · 2018-01-12T18:24:52.000+02:00
diff --git a/lib/matplotlib/tests/test_dviread.py b/lib/matplotlib/tests/test_dviread.py
@@ -13,6 +13,7 @@
 import json
 import pytest
 import sqlite3
+import warnings
 
 
 def test_PsfontsMap(monkeypatch):
@@ -163,3 +164,18 @@ def test_find_tex_files(tmpdir):
             {'foo.pfb': '{s}tmp{s}foo.pfb'.format(s=os.path.sep),
              'cmr10.tfm': '{s}usr{s}local{s}cmr10.tfm'.format(s=os.path.sep)}
         assert mock_popen.called
+
+
+def test_find_tex_file_format():
+    with mock.patch('matplotlib.dviread.subprocess.Popen') as mock_popen:
+        mock_proc = mock.Mock()
+        stdout = b'/foo/bar/baz\n'
+        mock_proc.configure_mock(**{'communicate.return_value': (stdout, b'')})
+        mock_popen.return_value = mock_proc
+
+        warnings.filterwarnings(
+            'ignore',
+            'The format option to find_tex_file is deprecated.*',
+            UserWarning)
+        assert dr.find_tex_file('foobar', format='tfm') == '/foo/bar/baz'
+        assert mock_popen.called
