Fixed database typo and removed unnecessary class identifier.

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

@@ -0,0 +1,70 @@
+from matplotlib.font_manager import FontProperties
+
+
+# Attributes on FontProperties object to check for consistency
+keys = [
+    "get_family",
+    "get_style",
+    "get_variant",
+    "get_weight",
+    "get_size",
+    ]
+
+
+def test_fontconfig_pattern():
+    """Test converting a FontProperties to string then back."""
+
+    # Defaults
+    test = "defaults "
+    f1 = FontProperties()
+    s = str(f1)
+
+    f2 = FontProperties(s)
+    for k in keys:
+        assert getattr(f1, k)() == getattr(f2, k)(), test + k
+
+    # Basic inputs
+    test = "basic "
+    f1 = FontProperties(family="serif", size=20, style="italic")
+    s = str(f1)
+
+    f2 = FontProperties(s)
+    for k in keys:
+        assert getattr(f1, k)() == getattr(f2, k)(), test + k
+
+    # Full set of inputs.
+    test = "full "
+    f1 = FontProperties(family="sans-serif", size=24, weight="bold",
+                        style="oblique", variant="small-caps",
+                        stretch="expanded")
+    s = str(f1)
+
+    f2 = FontProperties(s)
+    for k in keys:
+        assert getattr(f1, k)() == getattr(f2, k)(), test + k
+
+
+def test_fontconfig_str():
+    """Test FontProperties string conversions for correctness."""
+
+    # Known good strings taken from actual font config specs on a linux box
+    # and modified for MPL defaults.
+
+    # Default values found by inspection.
+    test = "defaults "
+    s = ("sans\\-serif:style=normal:variant=normal:weight=normal"
+         ":stretch=normal:size=12.0")
+    font = FontProperties(s)
+    right = FontProperties()
+    for k in keys:
+        assert getattr(font, k)() == getattr(right, k)(), test + k
+
+    test = "full "
+    s = ("serif:size=24:style=oblique:variant=small-caps:weight=bold"
+         ":stretch=expanded")
+    font = FontProperties(s)
+    right = FontProperties(family="serif", size=24, weight="bold",
+                           style="oblique", variant="small-caps",
+                           stretch="expanded")
+    for k in keys:
+        assert getattr(font, k)() == getattr(right, k)(), test + k