fixup! Add inital image comparison tests for transects

pyproject.toml

@@ -5,6 +5,12 @@ requires = [
 build-backend = "setuptools.build_meta"
 
 [tool.pytest.ini_options]
+addopts = [
+	# TODO Work around till the mpl-baseline-path ini option is included in the
+	# next pytest-mpl release.
+	"--mpl-baseline-path", "tests/baseline_images",
+]
+
 testpaths = ["tests"]
 filterwarnings = [
 	"error",
@@ -18,6 +24,11 @@ markers = [
 	"tutorial: Tests that involve the tutorial datasets",
 ]
 
+mpl-use-full-test-name = true
+# TODO This option will be included in the next version of pytest-mpl.
+# Till then, it is added using addopts above
+# mpl-baseline-path = "tests/baseline_images"
+
 [tool.mypy]
 python_version = "3.9"
 plugins = ["numpy.typing.mypy_plugin"]

tests/test_plot.py

@@ -52,6 +52,7 @@ def test_add_landmarks():
         assert text.xy == landmark[1].coords.xy
 
 
+@pytest.mark.mpl_image_compare
 @pytest.mark.matplotlib(mock_coast=True)
 @pytest.mark.tutorial
 def test_plot(
@@ -68,8 +69,7 @@ def test_plot(
     axes = figure.axes[0]
     assert axes.get_title() == 'Temperature\n2022-05-11T14:00'
 
-    matplotlib.pyplot.savefig(tmp_path / 'plot.png')
-    logger.info("Saved plot to %r", tmp_path / 'plot.png')
+    return figure
 
 
 @pytest.mark.matplotlib(mock_coast=True)

tests/test_transect.py

@@ -11,7 +11,7 @@
 
 
 @pytest.mark.mpl_image_compare
-@pytest.mark.matplotlib(mock_coast=True)
+@pytest.mark.matplotlib
 @pytest.mark.tutorial
 def test_plot(
     datasets: pathlib.Path,