Revert "Remove solver argument from other notebooks"

This reverts commit 3af12ec693f6ed3671545bbadb60fbbe94e4e3bc.

.gitlab-ci.yml

@@ -1,11 +1,30 @@
-conda:
-  image: continuumio/miniconda3:latest
+image: continuumio/miniconda3:latest
 
+before_script:
+  - conda install mamba -c conda-forge
+  - mamba env update -n fine --file=requirements.yml
+  - mamba env update -n fine --file=requirements_dev.yml
+  - mamba info --envs
+  - source activate fine
+  - python -m pip install -e .
+
+test-code:
+  stage: test
+  script:
+    - python -m pytest --cov=FINE test/
+
+test-notebooks:
+  stage: test
   script:
-    - conda install mamba -c conda-forge
-    - mamba env update -n fine --file=requirements.yml
-    - mamba env update -n fine --file=requirements_dev.yml
-    - mamba info --envs
-    - source activate fine
-    - python -m pip install -e .
-    - python -m pytest --cov=FINE test/
+    # Run nbval to test all notebooks in examples folder
+    #   and show 20 longest cell executing durations
+    # With 'nbval-lax', notebooks are only tested for execution errors
+    # Cells tagged 'nbval-check-output' are checked for consistent output
+    # Cells tagged 'nbval-skip' are skipped
+    - python -m pytest --nbval-lax --current-env --durations=20 examples/
+  # Only test examples notebooks for branches master, develop and 47-test-notebooks
+  only:
+    refs:
+      - master
+      - develop
+      - 47-test-notebooks