Add pytest-mpl image comparison tests and update CI workflow

.travis.yml

@@ -1,12 +1,21 @@
-# Travis Continuos Integration
-# Currently only tests notebook files
-# Based on https://conda.pydata.org/docs/travis.html
-sudo: false # use container based build
+# Travis Continuous Integration
+# Mamba links:
+# https://mamba.readthedocs.io/en/latest/installation.html
+# Sample travis file:
+# https://conda.pydata.org/docs/travis.html
+# Avoiding duplicate branch-pr triggers:
+# https://github.com/travis-ci/travis-ci/issues/1147#issuecomment-160820262
+dist: xenial
+sudo: false  # use container based build
 language: python
-dist: focal
+
 notifications:
   email: false
 
+branches:
+  only:
+    - master
+
 python:
   - "3.7"
 
@@ -18,25 +27,22 @@ before_install:
           echo "Only doc files were updated, not running the CI."
           exit
         fi
-  - wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
-  - bash miniconda.sh -b -p $HOME/miniconda
-  - export PATH="$HOME/miniconda/bin:$PATH"
-  - hash -r
-  - conda config --set always_yes yes --set changeps1 no --set show_channel_urls true
-  - conda update -q conda
-  - conda info -a
+  - curl micro.mamba.pm/install.sh | bash
+  - export PATH="$HOME/micromamba/bin:$PATH"
+  - micromamba config set always_yes true
+  - micromamba config set changeps1 false
+  - micromamba config set show_channel_urls true
+  - micromamba shell init --shell=bash --prefix=~/micromamba
 
 install:
-  - conda env create --file ci/environment.yml
-  - source activate proplot-dev
-  - conda list
-  - which conda
+  - . ~/.bashrc
   - which python
+  - which micromamba
+  - micromamba env create --file ci/environment.yml
+  - micromamba activate proplot-dev
   - python setup.py sdist bdist_wheel
   - pip install --user ./dist/*.whl
+  - micromamba list
 
 script:
   - ci/run-linter.sh
-  - pushd docs
-  - make html
-  - popd

ci/environment.yml

@@ -7,12 +7,12 @@ channels:
 dependencies:
   - python==3.8
   - numpy==1.19.5
-  - pandas
-  - xarray
   - matplotlib==3.2.2
   - cartopy==0.20.2
-  - ipykernel
-  - pandoc
+  - seaborn
+  - pandas
+  - xarray
+  - pint
   - python-build
   - setuptools
   - setuptools_scm
@@ -26,14 +26,6 @@ dependencies:
     - black
     - doc8
     - pytest
-    - pytest-sugar
     - pyqt5
-    - docutils==0.16
-    - sphinx>=3.0
-    - sphinx-copybutton
-    - sphinx-rtd-light-dark
-    - jinja2==2.11.3
-    - markupsafe==2.0.1
-    - nbsphinx==0.8.1
     - jupytext
-    - git+https://github.com/proplot-dev/sphinx-automodapi@proplot-mods
+    - git+https://github.com/proplot-dev/pytest-mpl@proplot-mods

ci/run-linter.sh

@@ -12,6 +12,9 @@ flake8 proplot docs --exclude .ipynb_checkpoints --max-line-length=88 --ignore=W
 echo '[isort]'
 isort --recursive --check-only --line-width=88 --skip __init__.py --multi-line=3 --force-grid-wrap=0 --trailing-comma proplot
 
+echo '[pytest]'
+pytest proplot
+
 # echo '[black]'
 # black --check -S proplot