Add test file

Author: lcd1232

.github/workflows/test.yml

@@ -0,0 +1,59 @@
+name: Test
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v3
+      with:
+        enable-cache: true
+
+    - name: Install dependencies
+      run: |
+        uv sync --dev
+
+    - name: Lint with black
+      run: |
+        uv run black --check .
+
+    - name: Sort imports with isort
+      run: |
+        uv run isort --check-only .
+
+    - name: Type check with mypy
+      run: |
+        uv run mypy tempmail
+
+    - name: Test with pytest
+      run: |
+        uv run pytest tests/ -v --cov=tempmail --cov-report=xml --cov-report=term-missing
+
+    - name: Upload coverage to Codecov
+      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.11'
+      uses: codecov/codecov-action@v4
+      with:
+        file: ./coverage.xml
+        flags: unittests
+        name: codecov-umbrella
+        fail_ci_if_error: false