Better tests directory structure (#2231)

tests/image_specific_tests/scipy-notebook/data/matplotlib/matplotlib_1.py

@@ -0,0 +1,27 @@
+# type: ignore
+# Matplotlib: Create a simple plot example.
+# Refs: https://matplotlib.org/stable/gallery/lines_bars_and_markers/simple_plot.html
+
+# Optional test with [Matplotlib Jupyter Integration](https://github.com/matplotlib/ipympl)
+# %matplotlib widget
+import matplotlib.pyplot as plt
+import numpy as np
+
+# Data for plotting
+t = np.arange(0.0, 2.0, 0.01)
+s = 1 + np.sin(2 * np.pi * t)
+
+fig, ax = plt.subplots()
+ax.plot(t, s)
+
+ax.set(
+    xlabel="time (s)",
+    ylabel="voltage (mV)",
+    title="About as simple as it gets, folks",
+)
+ax.grid()
+
+# Note that the test can be run headless by checking if an image is produced
+file_path = "/tmp/test.png"
+fig.savefig(file_path)
+print(f"File {file_path} saved")

tests/image_specific_tests/scipy-notebook/data/matplotlib/matplotlib_fonts_1.py

@@ -0,0 +1,25 @@
+# Matplotlib: Test tex fonts
+import matplotlib
+import matplotlib.pyplot as plt
+
+matplotlib.rcParams["pgf.texsystem"] = "pdflatex"
+matplotlib.rcParams.update(
+    {
+        "font.family": "serif",
+        "font.size": 18,
+        "axes.labelsize": 20,
+        "axes.titlesize": 24,
+        "figure.titlesize": 28,
+    }
+)
+matplotlib.rcParams["text.usetex"] = True
+
+fig, ax = plt.subplots(1, 1)
+x = [1, 2]
+y = [1, 2]
+ax.plot(x, y, label="a label")
+ax.legend(fontsize=15)
+
+file_path = "/tmp/test_fonts.png"
+fig.savefig(file_path)
+print(f"File {file_path} saved")