From b53651850c7187652caae3277c6aac603c189f4f Mon Sep 17 00:00:00 2001
From: Chuck McCallum <mccallucc@gmail.com>
Date: Wed, 25 Sep 2024 16:16:35 -0400
Subject: [PATCH] simple end-to-end test

---
 .github/workflows/test.yml      |  3 +++
 README.md                       |  1 +
 dp_creator_ii/app.py            |  8 ++++----
 dp_creator_ii/tests/test_app.py | 13 +++++++++++++
 requirements-dev.in             |  1 +
 requirements-dev.txt            | 22 +++++++++++++++++++++-
 6 files changed, 43 insertions(+), 5 deletions(-)
 create mode 100644 dp_creator_ii/tests/test_app.py

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4f4bdb8..ecc48ab 100644
--- a/.github/workflows/test.yml
+++ b/.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
 
diff --git a/README.md b/README.md
index 18d7308..925c4bd 100644
--- a/README.md
+++ b/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:
diff --git a/dp_creator_ii/app.py b/dp_creator_ii/app.py
index cc80753..e6c1d35 100644
--- a/dp_creator_ii/app.py
+++ b/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"])
 
diff --git a/dp_creator_ii/tests/test_app.py b/dp_creator_ii/tests/test_app.py
new file mode 100644
index 0000000..ec1ea58
--- /dev/null
+++ b/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")
diff --git a/requirements-dev.in b/requirements-dev.in
index a2b13b8..f2eb714 100644
--- a/requirements-dev.in
+++ b/requirements-dev.in
@@ -11,6 +11,7 @@ pre-commit
 
 # Testing:
 pytest
+pytest-playwright
 mypy
 coverage
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index cce38d6..7916b16 100644
--- a/requirements-dev.txt
+++ b/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
@@ -232,6 +238,13 @@ 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
@@ -239,6 +252,8 @@ python-dateutil==2.9.0.post0
     #   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