[liked_list] false takes precedence over nil

gateway/src/apicast/linked_list.lua

@@ -10,7 +10,7 @@ local noop = function() end
 
 local empty_t = setmetatable({}, { __newindex = noop })
 local __index = function(t,k)
-    return t.current[k] or t.next[k]
+    if t.current[k] == nil then return t.next[k] else return t.current[k] end
 end
 
 local ro_mt = {

spec/linked_list_spec.lua

@@ -26,6 +26,12 @@ describe('linked_list', function()
       assert.same({ b = 2 }, list.next.current)
       assert.same({ c = 3 }, list.next.next)
     end)
+
+    it('takes false over nil', function()
+      local list = linked_list.readonly({ a = false }, { a = 'value' })
+
+      assert.is_false(list.a)
+    end)
   end)
 
   describe('readwrite', function()
@@ -54,5 +60,13 @@ describe('linked_list', function()
       assert.same({ b = 2 }, list.next.current)
       assert.same({ c = 3 }, list.next.next)
     end)
+
+    it('can override values with false', function()
+      local list = linked_list.readwrite({  }, { a = 'value' })
+
+      list.a = false
+
+      assert.is_false(list.a)
+    end)
   end)
 end)