Add validateRichMenu

Author: kcvlex

lib/client.ts

@@ -722,6 +722,13 @@ export default class Client {
     );
     return ensureJSON(res);
   }
+
+  public async validateRichMenu(richMenu: Types.RichMenu): Promise<{}> {
+    return await this.http.post<{}>(
+      `${MESSAGING_API_PREFIX}/richmenu/validate`,
+      richMenu,
+    );
+  }
 }
 
 export class OAuth {

test/client.spec.ts

@@ -1053,6 +1053,17 @@ describe("client", () => {
     await client.getBotInfo();
     equal(scope.isDone(), true);
   });
+
+  it("validateRichMenu", async () => {
+    const scope = mockPost(
+      MESSAGING_API_PREFIX,
+      `/richmenu/validate`,
+      richMenu,
+    );
+
+    await client.validateRichMenu(richMenu);
+    equal(scope.isDone(), true);
+  });
 });
 
 const oauth = new OAuth();