Convert attributes test to GreenDots (#574)

.rubocop.yml

@@ -6,4 +6,7 @@ AllCops:
   TargetRubyVersion: 2.7
 
 Style/ExplicitBlockArgument:
-  Enabled: false
+  Enabled: false
+
+Style/MixinUsage:
+  Enabled: false

gd/phlex/sgml/attributes.rb

@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+include TestHelper
+
+class ToStrable
+	def to_str
+		"foo"
+	end
+end
+
+test "with symbol-keyed hash attributes" do
+	component = build_component_with_template do
+		div data: { name: { first_name: "Joel" } }
+	end
+
+	expect(component.new).to_render %(<div data-name-first-name="Joel"></div>)
+end
+
+test "with string-keyed hash attributes" do
+	component = build_component_with_template do
+		div data: { "name" => { "first_name" => "Joel" } }
+	end
+
+	expect(component.new).to_render %(<div data-name-first_name="Joel"></div>)
+end
+
+test "with an array of symbols and strings" do
+	component = build_component_with_template do
+		div class: ["bg-red-500", :rounded]
+	end
+
+	expect(component.new).to_render %(<div class="bg-red-500 rounded"></div>)
+end
+
+test "with a set of symbols and strings" do
+	component = build_component_with_template do
+		div class: Set.new(["bg-red-500", :rounded])
+	end
+
+	expect(component.new).to_render %(<div class="bg-red-500 rounded"></div>)
+end
+
+test "with a to_str-able object" do
+	component = build_component_with_template do
+		div class: ToStrable.new
+	end
+
+	expect(component.new).to_render %(<div class="foo"></div>)
+end
+
+test "with numeric integer/float" do
+	component = build_component_with_template do
+		input type: "range", min: 0, max: 10, step: 0.5
+	end
+
+	expect(component.new).to_render %(<input type="range" min="0" max="10" step="0.5">)
+end
+
+if RUBY_ENGINE == "ruby"
+	context "with unique tag attributes" do
+		let def component
+			build_component_with_template do
+				div class: SecureRandom.hex
+			end
+		end
+
+		let def report
+			component.call
+
+			MemoryProfiler.report do
+				2.times { component.call }
+			end
+		end
+
+		test "doesn't leak memory" do
+			expect(report.total_retained) == 0
+		end
+	end
+end

gd/support/helper.rb

@@ -1,3 +1,23 @@
 # frozen_string_literal: true
 
 require "phlex"
+require "bundler"
+
+Bundler.require :test
+
+module TestHelper
+	def build_component_with_template(&block)
+		Class.new(Phlex::HTML) { define_method(:template, &block) }
+	end
+end
+
+module ToRender
+	def to_render(expected_output)
+		output = subject.call
+		assert(output == expected_output) { "Expected `#{output.inspect}` to equal `#{expected_output.inspect}`." }
+	end
+end
+
+GreenDots.configure do |config|
+	config.register_matcher ToRender, Phlex::SGML
+end