add tests for tutorials

tests/test_tutorial/test_request_form_models/test_tutorial003.py

@@ -0,0 +1,43 @@
+import importlib
+
+import pytest
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture(
+    name="client",
+    params=[
+        "tutorial003_py310",
+        "tutorial003_an_py310",
+    ],
+)
+def get_client(request: pytest.FixtureRequest):
+    mod = importlib.import_module(f"docs_src.request_form_models.{request.param}")
+
+    client = TestClient(mod.app)
+    return client
+
+
+def test_get_form(client: TestClient):
+    """The form has a checkbox that is by default checked"""
+    response = client.get("/form")
+    response.raise_for_status()
+    assert '<input type="checkbox" name="checkbox"' in response.text
+    assert 'checked="checked"' in response.text
+
+
+def test_post_form_checked(client: TestClient):
+    """When the checkbox is checked, the value is (correctly) True"""
+    response = client.post("/form", data={"checkbox": "on"})
+    response.raise_for_status()
+    assert response.json() == {"checkbox": True}
+
+
+def test_post_form_unchecked(client: TestClient):
+    """
+    When the checkbox is not checked,
+    the value is (maybe correctly but undesirably) still True
+    """
+    response = client.post("/form", data={"checkbox": ""})
+    response.raise_for_status()
+    assert response.json() == {"checkbox": True}

tests/test_tutorial/test_request_form_models/test_tutorial004.py

@@ -0,0 +1,44 @@
+import importlib
+
+import pytest
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture(
+    name="client",
+    params=[
+        "tutorial004_py310",
+        "tutorial004_an_py310",
+    ],
+)
+def get_client(request: pytest.FixtureRequest):
+    mod = importlib.import_module(f"docs_src.request_form_models.{request.param}")
+
+    client = TestClient(mod.app)
+    return client
+
+
+def test_get_form(client: TestClient):
+    """The form has a checkbox that is by default checked"""
+    response = client.get("/form")
+    response.raise_for_status()
+    assert '<input type="checkbox" name="checkbox"' in response.text
+    assert 'checked="checked"' in response.text
+
+
+def test_post_form_checked(client: TestClient):
+    """When the checkbox is checked, the value is (correctly) True"""
+    response = client.post("/form", data={"checkbox": "on"})
+    response.raise_for_status()
+    assert response.json() == {"checkbox": True}
+
+
+def test_post_form_unchecked(client: TestClient):
+    """
+    When the checkbox is not checked,
+    now that we have a model validator that can differentiate defaults vs. undefined,
+    the checkbox is correctly false.
+    """
+    response = client.post("/form", data={"checkbox": ""})
+    response.raise_for_status()
+    assert response.json() == {"checkbox": False}