Debug source cache

Author: rmosolgo

Rakefile

@@ -30,10 +30,7 @@ Rake::TestTask.new do |t|
 
   # After 2.7, there were not warnings for uninitialized ivars anymore
   if RUBY_VERSION < "3"
-    puts "Disabling warnings on Ruby #{RUBY_VERSION.inspect}"
     t.warning = false
-  else
-    puts "Enabling warnings on Ruby #{RUBY_VERSION.inspect}"
   end
 end
 

spec/graphql/dataloader/source_spec.rb

@@ -24,7 +24,9 @@ def fetch(keys)
 
     source_cache = dl.instance_variable_get(:@source_cache)
     source_cache_for_source = source_cache[FailsToLoadSource]
-    assert source_cache_for_source[[{}]].pending?, "The cache includes a pending source (#{source_cache_for_source.inspect})"
+    source_inst = source_cache_for_source[[{}]]
+    assert_instance_of FailsToLoadSource, source_inst, "The cache includes a pending source (#{source_cache_for_source.inspect})"
+    assert source_inst.pending?
   end
 
   class CustomKeySource < GraphQL::Dataloader::Source