Add basic test

.github/workflows/test.yml

@@ -0,0 +1,41 @@
+name: Test
+
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-22.04
+    timeout-minutes: 2
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+          cache: pip
+
+      # ref: https://github.com/pre-commit/action
+      # Run "pre-commit run --all-files"
+      - uses: pre-commit/[email protected]
+
+  test:
+    runs-on: ubuntu-22.04
+    timeout-minutes: 2
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+          cache: pip
+
+      - run: |
+          pip install ".[test]"
+
+      - run: |
+          python -mpytest -v

tests/test_project_costs.py

@@ -0,0 +1,26 @@
+from difflib import unified_diff
+from pathlib import Path
+
+import yaml
+
+from aws_project_costs.project_costs import analyse_costs_csv
+
+# from aws_project_costs.schema import validate
+
+EXAMPLE_DIR = Path(__file__).parent / ".." / "example"
+
+
+def test_analyse_costs_csv(tmp_path):
+    config_yaml = EXAMPLE_DIR / "projects.yaml"
+    input_csv = EXAMPLE_DIR / "2024-01-01_2024-02-01.csv"
+    output_csv = tmp_path / "output.csv"
+    reference_csv = EXAMPLE_DIR / "output.csv"
+
+    with (config_yaml).open() as f:
+        cfg = yaml.safe_load(f)
+    analyse_costs_csv(cfg, input_csv, output_csv)
+
+    reference = reference_csv.read_text().splitlines()
+    output = output_csv.read_text().splitlines()
+    diff = list(unified_diff(reference, output))
+    assert not diff, "\n".join(diff)