Shift tag parsing into parse method

test/integration/tag_test.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class TagTest < Minitest::Test
+  include Liquid
+
+  def test_all_tags_with_no_parse_can_render
+    Template.tags.each do |key, _tag|
+      Template.tags[key].new(key, '', ParseContext.new).render(Context.new)
+      assert_nil(nil)
+    end
+  end
+
+  def test_all_tags_are_registered
+    tags = Template.tags.map { |key, _tag| key }
+    expected_tags = %w(tablerow echo if break for assign ifchanged case include continue capture decrement unless increment comment raw render cycle)
+    assert_equal(expected_tags, tags)
+  end
+end