add tests in a GitHub Action

.dockerignore

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+.git/
+dist
+.egg/
+*.egg-info
+**/*.pyc
+**/*.swp
+**/__pycache__
+

.github/main.workflow

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+workflow "Quality" {
+  on = "push"
+  resolves = ["test"]
+}
+
+action "test" {
+  uses = "actions/docker/cli@master"
+  args = "build --target test ."
+}
+

Dockerfile

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+FROM python:3 AS poetry
+ENV PATH="/root/.poetry/bin:${PATH}"
+RUN curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python
+
+
+FROM poetry AS base
+RUN mkdir /app
+WORKDIR /app
+COPY pyproject.* .
+RUN poetry install -n
+COPY . /app
+
+
+FROM base AS Test
+RUN poetry run pytest