selective_rendering_from_cache.test.rb

# frozen_string_literal: true

class CacheTest < Phlex::HTML
	attr_reader :cache_store

	def initialize(page_id, cache_store:)
		@page_id = page_id
		@cache_store = cache_store
	end

	def view_template
		cache(@page_id) do
			h1 { "Page #{@page_id}" }
			fragment("outer") do
				div(id: "page") do
					cache do
						section do
							fragment("list") do
								ul do
									fragment("foo") { li { 1 } }
									li { 2 }
									li { 3 }
								end
							end
						end
					end
				end
			end
		end
	end
end

test "rendering a component with caches and fragments" do
	cache_store = Phlex::FIFOCacheStore.new
	output = CacheTest.new(1, cache_store:).call
	assert_equal_html output, "<h1>Page 1</h1><div id=\"page\"><section><ul><li>1</li><li>2</li><li>3</li></ul></section></div>"

	output = CacheTest.new(1, cache_store:).call
	assert_equal_html output, "<h1>Page 1</h1><div id=\"page\"><section><ul><li>1</li><li>2</li><li>3</li></ul></section></div>"
end

test "rendering a component with caches and fragments" do
	cache_store = Phlex::FIFOCacheStore.new
	output = CacheTest.new(1, cache_store:).call
	assert_equal_html output, "<h1>Page 1</h1><div id=\"page\"><section><ul><li>1</li><li>2</li><li>3</li></ul></section></div>"

	output = CacheTest.new(2, cache_store:).call
	assert_equal_html output, "<h1>Page 2</h1><div id=\"page\"><section><ul><li>1</li><li>2</li><li>3</li></ul></section></div>"
end

test "rendering a specific fragment from within a cache" do
	cache_store = Phlex::FIFOCacheStore.new
	2.times do
		output = CacheTest.new(2, cache_store:).call(fragments: ["list"])
		assert_equal_html output, "<ul><li>1</li><li>2</li><li>3</li></ul>"
	end
end

test "rendering a nested fragment from within a cache" do
	cache_store = Phlex::FIFOCacheStore.new
	output = CacheTest.new(1, cache_store:).call(fragments: ["foo"])
	assert_equal_html output, "<li>1</li>"
end

test "rendering multiple fragments from within a cache" do
	cache_store = Phlex::FIFOCacheStore.new
	output = CacheTest.new(1, cache_store:).call(fragments: ["list", "foo"])
	assert_equal_html output, "<ul><li>1</li><li>2</li><li>3</li></ul>"
end

test "rendering multiple fragments out of order from within a cache" do
	cache_store = Phlex::FIFOCacheStore.new
	output = CacheTest.new(1, cache_store:).call(fragments: ["foo", "list"])
	assert_equal_html output, "<ul><li>1</li><li>2</li><li>3</li></ul>"
end

test "cache contains full value if initially rendered as a fragment" do
	cache_store = Phlex::FIFOCacheStore.new
	output = CacheTest.new(1, cache_store:).call(fragments: ["foo"])
	assert_equal_html output, "<li>1</li>"

	output = CacheTest.new(1, cache_store:).call
	assert_equal_html output, "<h1>Page 1</h1><div id=\"page\"><section><ul><li>1</li><li>2</li><li>3</li></ul></section></div>"
end

test "fetching a nested fragment from a cached value" do
	cache_store = Phlex::FIFOCacheStore.new
	CacheTest.new(1, cache_store:).call # Cache the outer cache for key = 1, and the inner cache for all other keys
	output = CacheTest.new(2, cache_store:).call(fragments: ["foo"])
	assert_equal_html output, "<li>1</li>"
end