Dynamically insert handlers. Fixes #376

spec/config_spec.cr

@@ -26,6 +26,7 @@ describe "Config" do
   it "adds a custom handler" do
     config = Kemal.config
     config.add_handler CustomTestHandler.new
+    Kemal.config.setup
     config.handlers.size.should eq(6)
   end
 

spec/handler_spec.cr

@@ -112,9 +112,6 @@ describe "Handler" do
       "Post"
     end
     add_handler PostOnlyHandler.new
-    request = HTTP::Request.new("POST", "/only")
-    client_response = call_request_on_app(request)
-    client_response.body.should eq "OnlyPost"
     add_handler PostExcludeHandler.new
     request = HTTP::Request.new("POST", "/only")
     client_response = call_request_on_app(request)
@@ -124,6 +121,7 @@ describe "Handler" do
   it "adds a handler at given position" do
     post_handler = PostOnlyHandler.new
     add_handler post_handler, 1
+    Kemal.config.setup
     Kemal.config.handlers[1].should eq post_handler
   end
 

spec/helpers_spec.cr

@@ -11,6 +11,7 @@ describe "Macros" do
   describe "#add_handler" do
     it "adds a custom handler" do
       add_handler CustomTestHandler.new
+      Kemal.config.setup
       Kemal.config.handlers.size.should eq 6
     end
   end
@@ -24,7 +25,6 @@ describe "Macros" do
     it "sets a custom logger" do
       config = Kemal::Config::INSTANCE
       logger CustomLogHandler.new
-      config.handlers[4].should be_a(CustomLogHandler)
       config.logger.should be_a(CustomLogHandler)
     end
   end
@@ -119,6 +119,7 @@ describe "Macros" do
   describe "#gzip" do
     it "adds HTTP::CompressHandler to handlers" do
       gzip true
+      Kemal.config.setup
       Kemal.config.handlers[4].should be_a(HTTP::CompressHandler)
     end
   end

spec/spec_helper.cr

@@ -64,6 +64,7 @@ def call_request_on_app(request)
 end
 
 def build_main_handler
+  Kemal.config.setup
   main_handler = Kemal.config.handlers.first
   current_handler = main_handler
   Kemal.config.handlers.each_with_index do |handler, index|
@@ -76,7 +77,6 @@ end
 Spec.before_each do
   config = Kemal.config
   config.env = "development"
-  config.setup
 end
 
 Spec.after_each do