Refactor class level DSL with macros to convert blocks to instance-scoped methods

spec/application_mode_spec.cr

@@ -8,6 +8,10 @@ private class MyApp < Kemal::Application
   get "/route2" do |env|
     "Route 2"
   end
+
+  get "/file" do |env|
+    send_file env, "Serdar".to_slice
+  end
 end
 
 describe MyApp do
@@ -24,4 +28,23 @@ describe MyApp do
       end
     end
   end
+
+  it "sends file with binary stream" do
+    request = HTTP::Request.new("GET", "/file")
+    response = call_request_on_app(MyApp.new, request)
+    response.status_code.should eq(200)
+    response.headers["Content-Type"].should eq("application/octet-stream")
+    response.headers["Content-Length"].should eq("6")
+  end
+
+  it "responds to delayed route" do
+    app = MyApp.new
+    app.setup
+    app.get "/delayed" do |env|
+      "Happy addition!"
+    end
+    request = HTTP::Request.new("GET", "/delayed")
+    client_response = call_request_on_app(app, request)
+    client_response.body.should eq("Happy addition!")
+  end
 end