From e9b649b3455c63859f1b865a8684607d6ff5b050 Mon Sep 17 00:00:00 2001
From: Dylan Thacker-Smith <dylan.smith@shopify.com>
Date: Tue, 21 Jan 2020 15:09:22 -0500
Subject: [PATCH] Fix Liquid::Template inheritance (#1227)

self.class.default_resource_limits would return `nil` in a subclass, since
the attribute isn't set on subclasses.
---
 lib/liquid/template.rb          | 5 ++---
 test/unit/template_unit_test.rb | 7 +++++++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/lib/liquid/template.rb b/lib/liquid/template.rb
index 4cdf837..a15d3e6 100644
--- a/lib/liquid/template.rb
+++ b/lib/liquid/template.rb
@@ -119,14 +119,13 @@ module Liquid
       # To enable profiling, pass in <tt>profile: true</tt> as an option.
       # See Liquid::Profiler for more information
       def parse(source, options = {})
-        template = Template.new
-        template.parse(source, options)
+        new.parse(source, options)
       end
     end
 
     def initialize
       @rethrow_errors  = false
-      @resource_limits = ResourceLimits.new(self.class.default_resource_limits)
+      @resource_limits = ResourceLimits.new(Template.default_resource_limits)
     end
 
     # Parse source code.
diff --git a/test/unit/template_unit_test.rb b/test/unit/template_unit_test.rb
index 4e02c2d..b756694 100644
--- a/test/unit/template_unit_test.rb
+++ b/test/unit/template_unit_test.rb
@@ -77,4 +77,11 @@ class TemplateUnitTest < Minitest::Test
   ensure
     Template.tags.delete('fake')
   end
+
+  class TemplateSubclass < Liquid::Template
+  end
+
+  def test_template_inheritance
+    assert_equal("foo", TemplateSubclass.parse("foo").render)
+  end
 end