adding a draft of a smoke test; fix var name in notebook

examples/PySDM_examples/deJong_Azimi/box.ipynb

@@ -128,7 +128,7 @@
     "        cloudy_data_0d.MOM_data['Golovin']['aDists'][j][0],\n",
     "        cloudy_data_0d.MOM_data['Golovin']['aDists'][j][1],\n",
     "        cloudy_data_0d.MOM_data['Golovin']['aDists'][j][2]\n",
-    "    ) * 3 * m_plt**2 * si.ug / si.cm**3\n",
+    "    ) * 3 * m_plt_ug**2 * si.ug / si.cm**3\n",
     "    ax.plot(\n",
     "        in_unit(r_plt, si.um),\n",
     "        in_unit(a_dmdlnr, si.kg / si.m**3),\n",

tests/smoke_tests/box/dejong_azimi/test_box.py

@@ -0,0 +1,31 @@
+""" regression tests asserting on values from the plots """
+
+from pathlib import Path
+
+import pytest
+
+from PySDM_examples.utils import notebook_vars
+from PySDM_examples import deJong_Azimi
+
+from PySDM.physics import si
+
+PLOT = False
+
+
+@pytest.fixture(scope="session", name="variables")
+def variables_fixture():
+    return notebook_vars(
+        file=Path(deJong_Azimi.__file__).parent / "box.ipynb", plot=PLOT
+    )
+
+
+def test_settings_a(variables):
+    pass
+
+
+def test_settings_b(variables):
+    pass
+
+
+def test_settings_c(variables):
+    pass