1 files changed, 138 insertions, 0 deletions
diff --git a/actionpack/test/dispatch/show_exceptions_test.rb b/actionpack/test/dispatch/show_exceptions_test.rb
new file mode 100644
index 0000000000..b69071b44b
--- /dev/null
+++ b/actionpack/test/dispatch/show_exceptions_test.rb
@@ -0,0 +1,138 @@
+# frozen_string_literal: true
+
+require "abstract_unit"
+
+class ShowExceptionsTest < ActionDispatch::IntegrationTest
+  class Boomer
+    def call(env)
+      req = ActionDispatch::Request.new(env)
+      case req.path
+      when "/not_found"
+        raise AbstractController::ActionNotFound
+      when "/bad_params", "/bad_params.json"
+        begin
+          raise StandardError.new
+        rescue
+          raise ActionDispatch::Http::Parameters::ParseError
+        end
+      when "/method_not_allowed"
+        raise ActionController::MethodNotAllowed, "PUT"
+      when "/unknown_http_method"
+        raise ActionController::UnknownHttpMethod
+      when "/not_found_original_exception"
+        begin
+          raise AbstractController::ActionNotFound.new
+        rescue
+          raise ActionView::Template::Error.new("template")
+        end
+      else
+        raise "puke!"
+      end
+    end
+  end
+
+  ProductionApp = ActionDispatch::ShowExceptions.new(Boomer.new, ActionDispatch::PublicExceptions.new("#{FIXTURE_LOAD_PATH}/public"))
+
+  test "skip exceptions app if not showing exceptions" do
+    @app = ProductionApp
+    assert_raise RuntimeError do
+      get "/", headers: { "action_dispatch.show_exceptions" => false }
+    end
+  end
+
+  test "rescue with error page" do
+    @app = ProductionApp
+
+    get "/", headers: { "action_dispatch.show_exceptions" => true }
+    assert_response 500
+    assert_equal "500 error fixture\n", body
+
+    get "/bad_params", headers: { "action_dispatch.show_exceptions" => true }
+    assert_response 400
+    assert_equal "400 error fixture\n", body
+
+    get "/not_found", headers: { "action_dispatch.show_exceptions" => true }
+    assert_response 404
+    assert_equal "404 error fixture\n", body
+
+    get "/method_not_allowed", headers: { "action_dispatch.show_exceptions" => true }
+    assert_response 405
+    assert_equal "", body
+
+    get "/unknown_http_method", headers: { "action_dispatch.show_exceptions" => true }
+    assert_response 405
+    assert_equal "", body
+  end
+
+  test "localize rescue error page" do
+    old_locale, I18n.locale = I18n.locale, :da
+
+    begin
+      @app = ProductionApp
+
+      get "/", headers: { "action_dispatch.show_exceptions" => true }
+      assert_response 500
+      assert_equal "500 localized error fixture\n", body
+
+      get "/not_found", headers: { "action_dispatch.show_exceptions" => true }
+      assert_response 404
+      assert_equal "404 error fixture\n", body
+    ensure
+      I18n.locale = old_locale
+    end
+  end
+
+  test "sets the HTTP charset parameter" do
+    @app = ProductionApp
+
+    get "/", headers: { "action_dispatch.show_exceptions" => true }
+    assert_equal "text/html; charset=utf-8", response.headers["Content-Type"]
+  end
+
+  test "show registered original exception for wrapped exceptions" do
+    @app = ProductionApp
+
+    get "/not_found_original_exception", headers: { "action_dispatch.show_exceptions" => true }
+    assert_response 404
+    assert_match(/404 error/, body)
+  end
+
+  test "calls custom exceptions app" do
+    exceptions_app = lambda do |env|
+      assert_kind_of AbstractController::ActionNotFound, env["action_dispatch.exception"]
+      assert_equal "/404", env["PATH_INFO"]
+      assert_equal "/not_found_original_exception", env["action_dispatch.original_path"]
+      [404, { "Content-Type" => "text/plain" }, ["YOU FAILED"]]
+    end
+
+    @app = ActionDispatch::ShowExceptions.new(Boomer.new, exceptions_app)
+    get "/not_found_original_exception", headers: { "action_dispatch.show_exceptions" => true }
+    assert_response 404
+    assert_equal "YOU FAILED", body
+  end
+
+  test "returns an empty response if custom exceptions app returns X-Cascade pass" do
+    exceptions_app = lambda do |env|
+      [404, { "X-Cascade" => "pass" }, []]
+    end
+
+    @app = ActionDispatch::ShowExceptions.new(Boomer.new, exceptions_app)
+    get "/method_not_allowed", headers: { "action_dispatch.show_exceptions" => true }
+    assert_response 405
+    assert_equal "", body
+  end
+
+  test "bad params exception is returned in the correct format" do
+    @app = ProductionApp
+
+    get "/bad_params", headers: { "action_dispatch.show_exceptions" => true }
+    assert_equal "text/html; charset=utf-8", response.headers["Content-Type"]
+    assert_response 400
+    assert_match(/400 error/, body)
+
+    get "/bad_params.json", headers: { "action_dispatch.show_exceptions" => true }
+    assert_equal "application/json; charset=utf-8", response.headers["Content-Type"]
+    assert_response 400
+    assert_equal("{\"status\":400,\"error\":\"Bad Request\"}", body)
+  end
+end