simple end-to-end test

.github/workflows/test.yml

@@ -37,6 +37,9 @@ jobs:
       - name: Install dev dependencies
         run: pip install -r requirements-dev.txt
 
+      - name: Install browsers
+        run: playwright install
+
       - name: Test
         run: coverage run -m pytest -v
 

README.md

@@ -41,6 +41,7 @@ python3 -m venv .venv
 source .venv/bin/activate
 pip install -r requirements-dev.txt
 pre-commit install
+playwright install
 ```
 
 Now install the application itself and run it:

dp_creator_ii/app.py

@@ -3,10 +3,6 @@
 
 from shiny import App, ui, reactive, render
 
-config_path = Path(__file__).parent / "config.json"
-config = json.loads(config_path.read_text())
-config_path.unlink()
-
 
 def dataset_panel():
     return ui.nav_panel(
@@ -48,6 +44,10 @@ def results_panel():
 
 
 def server(input, output, session):
+    config_path = Path(__file__).parent / "config.json"
+    config = json.loads(config_path.read_text())
+    config_path.unlink()
+
     csv_path = reactive.value(config["csv_path"])
     unit_of_privacy = reactive.value(config["unit_of_privacy"])
 

dp_creator_ii/tests/test_app.py

@@ -0,0 +1,13 @@
+from shiny.run import ShinyAppProc
+from playwright.sync_api import Page, expect
+from shiny.pytest import create_app_fixture
+
+
+app = create_app_fixture("../app.py")
+
+
+# TODO: Why is incomplete coverage reported here?
+def test_app(page: Page, app: ShinyAppProc):  # pragma: no cover
+    page.goto(app.url)
+    expect(page).to_have_title("DP Creator II")
+    expect(page.locator("body")).to_contain_text("TODO: Pick dataset")

requirements-dev.in

@@ -11,6 +11,7 @@ pre-commit
 
 # Testing:
 pytest
+pytest-playwright
 mypy
 coverage
 

requirements-dev.txt

@@ -73,6 +73,8 @@ flit==3.9.0
     # via -r requirements-dev.in
 flit-core==3.9.0
     # via flit
+greenlet==3.0.3
+    # via playwright
 h11==0.14.0
     # via uvicorn
 htmltools==0.5.3
@@ -200,6 +202,8 @@ platformdirs==4.3.6
     #   black
     #   jupyter-core
     #   virtualenv
+playwright==1.47.0
+    # via pytest-playwright
 pluggy==1.5.0
     # via pytest
 polars==1.1.0
@@ -221,6 +225,8 @@ pyarrow==17.0.0
     # via opendp
 pycodestyle==2.12.1
     # via flake8
+pyee==12.0.0
+    # via playwright
 pyflakes==3.2.0
     # via flake8
 pygments==2.18.0
@@ -232,13 +238,22 @@ pyproject-hooks==1.1.0
     #   build
     #   pip-tools
 pytest==8.3.3
+    # via
+    #   -r requirements-dev.in
+    #   pytest-base-url
+    #   pytest-playwright
+pytest-base-url==2.1.0
+    # via pytest-playwright
+pytest-playwright==0.5.2
     # via -r requirements-dev.in
 python-dateutil==2.9.0.post0
     # via
     #   jupyter-client
     #   shinywidgets
 python-multipart==0.0.9
     # via shiny
+python-slugify==8.0.4
+    # via pytest-playwright
 pyyaml==6.0.2
     # via
     #   jupytext
@@ -256,7 +271,9 @@ referencing==0.35.1
     #   jsonschema
     #   jsonschema-specifications
 requests==2.32.3
-    # via flit
+    # via
+    #   flit
+    #   pytest-base-url
 rpds-py==0.20.0
     # via
     #   jsonschema
@@ -286,6 +303,8 @@ stack-data==0.6.3
     # via ipython
 starlette==0.38.5
     # via shiny
+text-unidecode==1.3
+    # via python-slugify
 threadpoolctl==3.5.0
     # via scikit-learn
 tinycss2==1.3.0
@@ -312,6 +331,7 @@ typing-extensions==4.12.2
     # via
     #   htmltools
     #   mypy
+    #   pyee
     #   shiny
 uc-micro-py==1.0.3
     # via linkify-it-py