Test for multiple warnings in pyfunction

tests/test_pyfunction.rs

@@ -672,3 +672,42 @@ fn test_pyfunction_deprecated() {
         );
     });
 }
+
+#[test]
+fn test_pyfunction_multiple_warnings() {
+    #[pyfunction]
+    #[pyo3(warn(message = "this function raises warning"))]
+    #[pyo3(warn(message = "this function raises FutureWarning", category = PyFutureWarning))]
+    fn function_with_multiple_warnings() {}
+
+    Python::with_gil(|py| {
+        let f = wrap_pyfunction_bound!(function_with_multiple_warnings)(py).unwrap();
+        py_expect_warning!(
+            py,
+            f,
+            "f()",
+            [
+                ("this function raises warning", PyUserWarning),
+                ("this function raises FutureWarning", PyFutureWarning)
+            ]
+        );
+    });
+
+    #[pyfunction]
+    #[pyo3(warn(message = "this function raises warning"))]
+    #[pyo3(deprecated = "this function is deprecated")]
+    fn function_with_warning_and_deprecated() {}
+
+    Python::with_gil(|py| {
+        let f = wrap_pyfunction_bound!(function_with_warning_and_deprecated)(py).unwrap();
+        py_expect_warning!(
+            py,
+            f,
+            "f()",
+            [
+                ("this function raises warning", PyUserWarning),
+                ("this function is deprecated", PyDeprecationWarning)
+            ]
+        );
+    });
+}