workflow

.github/ISSUE_TEMPLATE/workflows/pythonpackage.yml

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+name: Test Rich module
+
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        python-version: ["3.7", "3.8", "3.9"]
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+          architecture: x64
+      - name: Install and configure Poetry
+        uses: snok/install-poetry@v1.1.6
+        with:
+          version: 1.1.6
+          virtualenvs-in-project: true
+      - name: Install dependencies
+        run: poetry install
+        if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
+      - name: Format check with black
+        run: |
+          source $VENV
+          make format-check
+      - name: Typecheck with mypy
+        run: |
+          source $VENV
+          make typecheck
+      - name: Test with pytest
+        run: |
+          source $VENV
+          pytest tests -v --cov=./src/textual --cov-report=xml:./coverage.xml --cov-report term-missing
+      - name: Upload code coverage
+        uses: codecov/codecov-action@v1.0.10
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          file: ./coverage.xml
+          name: rich
+          flags: unittests
+          env_vars: OS,PYTHON

CHANGELOG.md

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+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [Unreleased] - yyyy-mm-dd
+
+Here we write upgrading notes for brands. It's a team effort to make them as
+straightforward as possible.

Makefile

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+test:
+	pytest --cov-report term-missing --cov=textual tests/ -vv
+typecheck:
+	mypy -p rich --strict

tests/test_geometry.py

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+import pytest
+
+from textual.geometry import clamp, Point, Dimensions, Region
+
+
+def test_clamp():
+    assert clamp(5, 0, 10) == 5
+    assert clamp(-1, 0, 10) == 0
+    assert clamp(11, 0, 10) == 10
+    assert clamp(0, 0, 10) == 0
+    assert clamp(10, 0, 10) == 10
+
+
+def test_point_is_origin():
+    assert Point(0, 0).is_origin
+    assert not Point(1, 0).is_origin
+
+
+def test_point_add():
+    assert Point(1, 1) + Point(2, 2) == Point(3, 3)
+    assert Point(1, 2) + Point(3, 4) == Point(4, 6)
+    with pytest.raises(TypeError):
+        Point(1, 1) + "foo"
+
+
+def test_point_sub():
+    assert Point(1, 1) - Point(2, 2) == Point(-1, -1)
+    assert Point(3, 4) - Point(2, 1) == Point(1, 3)
+    with pytest.raises(TypeError):
+        Point(1, 1) - "foo"
+
+
+def test_point_blend():
+    assert Point(1, 2).blend(Point(3, 4), 0) == Point(1, 2)
+    assert Point(1, 2).blend(Point(3, 4), 1) == Point(3, 4)
+    assert Point(1, 2).blend(Point(3, 4), 0.5) == Point(2, 3)