test: assert field pacing wiring; simplify NullField

tests/unit/test_fields.py

@@ -85,3 +85,47 @@ class TestNullField:
         el = NullField(name="missing")
         if el:
             pytest.fail("NullField must be falsy")
+
+
+class TestPacingWiring:
+    def _spy_page(self, page):
+        page.pacing = MagicMock()
+        page.pacing.delay.return_value = 0.0
+        return page
+
+    def test_text_set_value_paces_text(self, page):
+        self._spy_page(page)
+        TextField(page, accessors=ACCESSORS, name="username").set_value("x")
+        page.pacing.delay.assert_called_once_with("text")
+
+    def test_select_set_value_paces_select(self, page, monkeypatch):
+        import wabot.fields as fields_mod
+
+        monkeypatch.setattr(fields_mod, "Select", MagicMock())
+        self._spy_page(page)
+        SelectField(page, accessors=("id", "state"), name="state").set_value(value="CO")
+        page.pacing.delay.assert_called_once_with("select")
+
+    def test_select_by_index_paces_select(self, page, monkeypatch):
+        import wabot.fields as fields_mod
+
+        monkeypatch.setattr(fields_mod, "Select", MagicMock())
+        self._spy_page(page)
+        SelectField(page, accessors=("id", "state"), name="state").select_by_index(2)
+        page.pacing.delay.assert_called_once_with("select")
+
+    def test_set_checked_paces_checkbox(self, page):
+        self._spy_page(page)
+        CheckField(page, accessors=("id", "agree"), name="agree").set_checked(True)
+        page.pacing.delay.assert_called_once_with("checkbox")
+
+    def test_click_and_go_paces_navigate(self, page):
+        self._spy_page(page)
+        PageObject(page, accessors=ACCESSORS, name="username").click_and_go()
+        page.pacing.delay.assert_called_once_with("navigate")
+
+
+class TestTruthiness:
+    def test_real_field_is_truthy(self, page):
+        # locks the other end of the `if el:` guard contract (NullField is falsy)
+        assert bool(TextField(page, accessors=ACCESSORS, name="username")) is True