1 files changed, 72 insertions, 0 deletions
diff --git a/railties/test/rails_info_test.rb b/railties/test/rails_info_test.rb
new file mode 100644
index 0000000000..d167a86e56
--- /dev/null
+++ b/railties/test/rails_info_test.rb
@@ -0,0 +1,72 @@
+# frozen_string_literal: true
+
+require "abstract_unit"
+
+class InfoTest < ActiveSupport::TestCase
+  def test_property_with_block_swallows_exceptions_and_ignores_property
+    assert_nothing_raised do
+      Rails::Info.module_eval do
+        property("Bogus") { raise }
+      end
+    end
+    assert_not property_defined?("Bogus")
+  end
+
+  def test_property_with_string
+    Rails::Info.module_eval do
+      property "Hello", "World"
+    end
+    assert_property "Hello", "World"
+  end
+
+  def test_property_with_block
+    Rails::Info.module_eval do
+      property("Goodbye") { "World" }
+    end
+    assert_property "Goodbye", "World"
+  end
+
+  def test_rails_version
+    assert_property "Rails version",
+      File.read(File.realpath("../../RAILS_VERSION", __dir__)).chomp
+  end
+
+  def test_html_includes_middleware
+    Rails::Info.module_eval do
+      property "Middleware", ["Rack::Lock", "Rack::Static"]
+    end
+
+    html = Rails::Info.to_html
+    assert_includes html, '<tr><td class="name">Middleware</td>'
+    properties.value_for("Middleware").each do |value|
+      assert_includes html, "<li>#{CGI.escapeHTML(value)}</li>"
+    end
+  end
+
+  def test_json_includes_middleware
+    Rails::Info.module_eval do
+      property "Middleware", ["Rack::Lock", "Rack::Static"]
+    end
+
+    hash = JSON.parse(Rails::Info.to_json)
+    assert_includes hash.keys, "Middleware"
+    properties.value_for("Middleware").each do |value|
+      assert_includes hash["Middleware"], value
+    end
+  end
+
+  private
+    def properties
+      Rails::Info.properties
+    end
+
+    def property_defined?(property_name)
+      properties.names.include? property_name
+    end
+
+    def assert_property(property_name, value)
+      raise "Property #{property_name.inspect} not defined" unless
+        property_defined? property_name
+      assert_equal value, properties.value_for(property_name)
+    end
+end