Add system test using JavaScript

Signed-off-by: Kenji Okimoto <okimoto@clear-code.com>

test/application_system_test_case.rb

@@ -0,0 +1,6 @@
+require "test_helper"
+
+class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
+  driven_by :selenium, using: :headless_chrome, screen_size: [1920, 1080]
+  # TODO enable screenshot
+end

test/system/source_and_output_test.rb

@@ -0,0 +1,102 @@
+require "application_system_test_case"
+
+class SourceAndOutputTest < ApplicationSystemTestCase
+  setup do
+    login_with(FactoryBot.build(:user))
+    @daemon = stub_daemon
+  end
+
+  attribute :js, true
+  test "config is blank" do
+    @daemon.agent.config_write("")
+    visit(source_and_output_daemon_setting_path)
+
+    page.has_content?(I18n.t("fluentd.settings.source_and_output.setting_empty"))
+    page.has_css?(".input .empty")
+    page.has_css?(".output .empty")
+  end
+
+  sub_test_case "config is given" do
+    setup do
+      config = <<-CONFIG.strip_heredoc
+        <source>
+          # http://docs.fluentd.org/articles/in_forward
+          type forward
+          port 24224
+        </source>
+
+        <match debug.*>
+          # http://docs.fluentd.org/articles/out_stdout
+          type stdout
+        </match>
+
+        <match s3.*>
+          type s3
+          aws_key_id fofoaiofa
+          aws_sec_key aaaaaaaaaaaaaae
+          s3_bucket test
+          s3_endpoint s3-us-west-1.amazonaws.com
+          format out_file
+          include_time_key false
+          add_newline false
+          output_tag true
+          output_time true
+          store_as gzip
+          use_ssl true
+          buffer_type memory
+        </match>
+      CONFIG
+      @daemon.agent.config_write(config)
+      visit(source_and_output_daemon_setting_path)
+    end
+
+    attribute :js, true
+    test "elements" do
+      assert do
+        !page.has_content?(I18n.t("fluentd.settings.source_and_output.setting_empty"))
+      end
+     assert do
+        page.has_css?('.input .card .card-header')
+      end
+      assert do
+        page.has_css?('.output .card .card-header')
+      end
+    end
+
+    attribute :js, true
+    test ".card-body is hidden by default and click .card-header for display"  do
+      assert do
+        !page.has_css?('.input .card .card-body')
+      end
+      assert do
+        !page.has_css?('.output .card .card-body')
+      end
+      all(".input .card .card-header").first.click
+      assert do
+        page.has_css?('.input .card .card-body')
+      end
+      all(".output .card .card-header").first.click
+      assert do
+        page.has_css?('.output .card .card-body')
+      end
+    end
+
+    attribute :js, true
+    test "display plugin name" do
+      within ".input" do
+        assert do
+          page.has_content?("forward")
+        end
+      end
+
+      within ".output" do
+        assert do
+          page.has_content?("stdout")
+        end
+        assert do
+          page.has_content?("s3")
+        end
+      end
+    end
+  end
+end