try nbval instead of treon

.github/workflows/tests.yml

@@ -39,4 +39,4 @@ jobs:
             - name: Test examples
               run: |
                   cd examples
-                  treon -v example.ipynb
+                  pytest --nbval -v example.ipynb

examples/example.ipynb

@@ -13,7 +13,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -41,7 +41,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [
     {
@@ -75,28 +75,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [
     {
-     "data": {
-      "text/plain": [
-       "[<pCrunch.io.openfast.OpenFASTBinary at 0x13b007610>,\n",
-       " <pCrunch.io.openfast.OpenFASTBinary at 0x13b008750>,\n",
-       " <pCrunch.io.openfast.OpenFASTBinary at 0x13b0b2e10>]"
-      ]
-     },
-     "execution_count": 8,
-     "metadata": {},
-     "output_type": "execute_result"
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[<class 'pCrunch.io.openfast.OpenFASTBinary'>, <class 'pCrunch.io.openfast.OpenFASTBinary'>, <class 'pCrunch.io.openfast.OpenFASTBinary'>]\n"
+     ]
     }
    ],
    "source": [
     "# The new framework provides an object oriented framework to interact with\n",
     "# output files. The easiest way to use this is to use the 'load_FAST_out' function.\n",
     "\n",
     "outputs = load_FAST_out(outfiles[:3])\n",
-    "outputs"
+    "print([type(m) for m in outputs])"
    ]
   },
   {

pyproject.toml

@@ -60,7 +60,7 @@ dependencies = ["fatpack", "numpy", "pandas", "pyyaml", "ruamel.yaml", "scipy"]
 # projects.
 [project.optional-dependencies] # Optional
 dev = ["pre-commit", "pylint", "flake8", "black", "isort"]
-test = ["pytest", "pytest-cov", "treon"]
+test = ["pytest", "pytest-cov", "nbval"]
 docs = ["sphinx", "sphinx_rtd_theme"]
 
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