Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/matplotlib/tests/test_matplotlib.py

@@ -0,0 +1,44 @@
+import os
+import subprocess
+import sys
+
+import pytest
+
+import matplotlib
+
+
+@pytest.mark.skipif(
+    os.name == "nt", reason="chmod() doesn't work as is on Windows")
+@pytest.mark.skipif(os.name != "nt" and os.geteuid() == 0,
+                    reason="chmod() doesn't work as root")
+def test_tmpconfigdir_warning(tmpdir):
+    """Test that a warning is emitted if a temporary configdir must be used."""
+    mode = os.stat(tmpdir).st_mode
+    try:
+        os.chmod(tmpdir, 0)
+        proc = subprocess.run(
+            [sys.executable, "-c", "import matplotlib"],
+            env={**os.environ, "MPLCONFIGDIR": str(tmpdir)},
+            stderr=subprocess.PIPE, universal_newlines=True, check=True)
+        assert "set the MPLCONFIGDIR" in proc.stderr
+    finally:
+        os.chmod(tmpdir, mode)
+
+
+def test_use_doc_standard_backends():
+    """
+    Test that the standard backends mentioned in the docstring of
+    matplotlib.use() are the same as in matplotlib.rcsetup.
+    """
+    def parse(key):
+        backends = []
+        for line in matplotlib.use.__doc__.split(key)[1].split('\n'):
+            if not line.strip():
+                break
+            backends += [e.strip() for e in line.split(',') if e]
+        return backends
+
+    assert (set(parse('- interactive backends:\n')) ==
+            set(matplotlib.rcsetup.interactive_bk))
+    assert (set(parse('- non-interactive backends:\n')) ==
+            set(matplotlib.rcsetup.non_interactive_bk))