Shorten test paths: rename image_specific_tests => by_image

tests/by_image/scipy-notebook/test_matplotlib.py

@@ -0,0 +1,55 @@
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+import logging
+from pathlib import Path
+
+import pytest  # type: ignore
+
+from tests.utils.tracked_container import TrackedContainer
+
+LOGGER = logging.getLogger(__name__)
+THIS_DIR = Path(__file__).parent.resolve()
+
+
+@pytest.mark.parametrize(
+    "test_file,expected_file,description",
+    [
+        (
+            "matplotlib_1.py",
+            "test.png",
+            "Test that matplotlib can plot a graph and write it as an image ...",
+        ),
+        (
+            "matplotlib_fonts_1.py",
+            "test_fonts.png",
+            "Test cm-super latex labels in matplotlib ...",
+        ),
+    ],
+)
+def test_matplotlib(
+    container: TrackedContainer, test_file: str, expected_file: str, description: str
+) -> None:
+    """Various tests performed on matplotlib
+
+    - Test that matplotlib is able to plot a graph and write it as an image
+    - Test matplotlib latex fonts, which depend on the cm-super package
+    """
+    host_data_dir = THIS_DIR / "data/matplotlib"
+    cont_data_dir = "/home/jovyan/data"
+    output_dir = "/tmp"
+    LOGGER.info(description)
+    running_container = container.run_detached(
+        volumes={str(host_data_dir): {"bind": cont_data_dir, "mode": "ro"}},
+        tty=True,
+        command=["bash", "-c", "sleep infinity"],
+    )
+    command = f"python {cont_data_dir}/{test_file}"
+    cmd = running_container.exec_run(command)
+    LOGGER.debug(cmd.output.decode())
+    assert cmd.exit_code == 0, f"Command {command} failed"
+    # Checking if the file is generated
+    # https://stackoverflow.com/a/15895594/4413446
+    command = f"test -s {output_dir}/{expected_file}"
+    cmd = running_container.exec_run(command)
+    LOGGER.debug(cmd.output.decode())
+    assert cmd.exit_code == 0, f"Command {command} failed"