update doc

frame/support/src/dispatch.rs

@@ -269,8 +269,11 @@ impl<T> Parameter for T where T: Codec + EncodeLike + Clone + Eq + fmt::Debug {}
 ///   * `fn on_finalize() -> frame_support::weights::Weight`
 ///
 /// * `offchain_worker`: Executes at the beginning of a block and produces extrinsics for a future block
-/// upon completion. Using this function will implement the
-/// [`OffchainWorker`](./traits/trait.OffchainWorker.html) trait.
+///   upon completion. Using this function will implement the
+///   [`OffchainWorker`](./traits/trait.OffchainWorker.html) trait.
+/// * `integrity_test`: Executes in a test generated by `construct_runtime`, note it doesn't
+///   executes in a externalities provided environment. Implement
+///   [`IntegrityTest`](./trait.IntegrityTest.html) trait.
 #[macro_export]
 macro_rules! decl_module {
 	// Entry point #1.