Deprecate py-button, py-inputbox, py-box and py-title (#931)

pyscriptjs/tests/integration/test_py_inputbox.py

@@ -20,3 +20,23 @@ class TestPyInputBox(PyScriptTest):
         input.press("Enter")
 
         assert self.console.log.lines == [self.PY_COMPLETE, "Hello"]
+
+    def test_deprecated_element(self):
+        self.pyscript_run(
+            """
+            <py-inputbox label="my input">
+                import js
+                def on_keypress(evt):
+                    if evt.key == "Enter":
+                        js.console.log(evt.target.value)
+            </py-inputbox>
+            """
+        )
+        banner = self.page.locator(".py-warning")
+        banner_content = banner.inner_text()
+        expected = (
+            "The element <py-input> is deprecated, "
+            'use <input class="py-input"> instead.'
+        )
+
+        assert banner_content == expected