Add a test for output-base-name with a .py file

Author: asmeurer

lib/matplotlib/tests/test_sphinxext.py

@@ -96,9 +96,10 @@ def plot_directive_file(num):
     assert filecmp.cmp(range_6, plot_file(17))
     # plot 22 is from the range6.py file again, but a different function
     assert filecmp.cmp(range_10, img_dir / 'range6_range10.png')
-    # plots 23 and 24 use a custom base name
-    assert filecmp.cmp(range_4, img_dir / 'custom-base-name-1.png')
-    assert filecmp.cmp(range_6, img_dir / 'custom-base-name-2.png')
+    # plots 23 through 25 use a custom base name
+    assert filecmp.cmp(range_6, img_dir / 'custom-base-name-6.png')
+    assert filecmp.cmp(range_10, img_dir / 'custom-base-name-10.png')
+    assert filecmp.cmp(range_4, img_dir / 'custom-base-name-4.png')
 
     # Modify the included plot
     contents = (tmp_path / 'included_plot_21.rst').read_bytes()

lib/matplotlib/tests/tinypages/some_plots.rst

@@ -175,14 +175,17 @@ Plot 22 uses a different specific function in a file with plot commands:
 
 .. plot:: range6.py range10
 
-Plots 23 and 24 use output-base-name.
+Plots 23 through 25 use output-base-name.
 
 .. plot::
-   :output-base-name: custom-base-name-1
+   :output-base-name: custom-base-name-6
 
-   plt.plot(range(4))
+   plt.plot(range(6))
 
 .. plot::
-   :output-base-name: custom-base-name-2
+   :output-base-name: custom-base-name-10
 
-   plt.plot(range(6))
+   plt.plot(range(10))
+
+.. plot:: range4.py
+   :output-base-name: custom-base-name-4