1 files changed, 128 insertions, 0 deletions
diff --git a/actionpack/test/controller/new_base/render_layout_test.rb b/actionpack/test/controller/new_base/render_layout_test.rb
new file mode 100644
index 0000000000..806c6206dc
--- /dev/null
+++ b/actionpack/test/controller/new_base/render_layout_test.rb
@@ -0,0 +1,128 @@
+# frozen_string_literal: true
+
+require "abstract_unit"
+
+module ControllerLayouts
+  class ImplicitController < ::ApplicationController
+    self.view_paths = [ActionView::FixtureResolver.new(
+      "layouts/application.html.erb" => "Main <%= yield %> Layout",
+      "layouts/override.html.erb"    => "Override! <%= yield %>",
+      "basic.html.erb"               => "Hello world!",
+      "controller_layouts/implicit/layout_false.html.erb" => "hi(layout_false.html.erb)"
+    )]
+
+    def index
+      render template: "basic"
+    end
+
+    def override
+      render template: "basic", layout: "override"
+    end
+
+    def layout_false
+      render layout: false
+    end
+
+    def builder_override
+    end
+  end
+
+  class ImplicitNameController < ::ApplicationController
+    self.view_paths = [ActionView::FixtureResolver.new(
+      "layouts/controller_layouts/implicit_name.html.erb" => "Implicit <%= yield %> Layout",
+      "basic.html.erb" => "Hello world!"
+    )]
+
+    def index
+      render template: "basic"
+    end
+  end
+
+  class RenderLayoutTest < Rack::TestCase
+    test "rendering a normal template, but using the implicit layout" do
+      get "/controller_layouts/implicit/index"
+
+      assert_body   "Main Hello world! Layout"
+      assert_status 200
+    end
+
+    test "rendering a normal template, but using an implicit NAMED layout" do
+      get "/controller_layouts/implicit_name/index"
+
+      assert_body "Implicit Hello world! Layout"
+      assert_status 200
+    end
+
+    test "overriding an implicit layout with render :layout option" do
+      get "/controller_layouts/implicit/override"
+      assert_body "Override! Hello world!"
+    end
+  end
+
+  class LayoutOptionsTest < Rack::TestCase
+    testing ControllerLayouts::ImplicitController
+
+    test "rendering with :layout => false leaves out the implicit layout" do
+      get :layout_false
+      assert_response "hi(layout_false.html.erb)"
+    end
+  end
+
+  class MismatchFormatController < ::ApplicationController
+    self.view_paths = [ActionView::FixtureResolver.new(
+      "layouts/application.html.erb" => "<html><%= yield %></html>",
+      "controller_layouts/mismatch_format/index.xml.builder" => "xml.instruct!",
+      "controller_layouts/mismatch_format/implicit.builder" => "xml.instruct!",
+      "controller_layouts/mismatch_format/explicit.js.erb" => "alert('foo');"
+    )]
+
+    def explicit
+      render layout: "application"
+    end
+  end
+
+  class MismatchFormatTest < Rack::TestCase
+    testing ControllerLayouts::MismatchFormatController
+
+    XML_INSTRUCT = %Q(<?xml version="1.0" encoding="UTF-8"?>\n)
+
+    test "if XML is selected, an HTML template is not also selected" do
+      get :index, params: { format: "xml" }
+      assert_response XML_INSTRUCT
+    end
+
+    test "if XML is implicitly selected, an HTML template is not also selected" do
+      get :implicit
+      assert_response XML_INSTRUCT
+    end
+
+    test "a layout for JS is ignored even if explicitly provided for HTML" do
+      get :explicit, params: { format: "js" }
+      assert_response "alert('foo');"
+    end
+  end
+
+  class FalseLayoutMethodController < ::ApplicationController
+    self.view_paths = [ActionView::FixtureResolver.new(
+      "controller_layouts/false_layout_method/index.js.erb" => "alert('foo');"
+    )]
+
+    layout :which_layout?
+
+    def which_layout?
+      false
+    end
+
+    def index
+    end
+  end
+
+  class FalseLayoutMethodTest < Rack::TestCase
+    testing ControllerLayouts::FalseLayoutMethodController
+
+    test "access false layout returned by a method/proc" do
+      get :index, params: { format: "js" }
+      assert_response "alert('foo');"
+    end
+  end
+end