fix meta data not hydrating for first cache

This affects caching's first hit when used with Superglue's deferred and
fragment. Fragments and deferred would be missing when it should be populated.

This fixes it by moving the meta data hydration to always, and we also
add a test for it.

Author: jho406

lib/props_template/extension_manager.rb

@@ -86,12 +86,13 @@ def handle_cache(options)
           result
         end
 
+        meta, raw_json = state.split("\n")
+        next_deferred, next_fragments = Oj.load(meta)
+        deferred.push(*next_deferred)
+        fragments.push(*next_fragments)
+
         if !recently_cached
-          meta, raw_json = state.split("\n")
-          next_deferred, next_fragments = Oj.load(meta)
           base.stream.push_json(raw_json)
-          deferred.push(*next_deferred)
-          fragments.push(*next_fragments)
         end
       else
         yield

spec/extensions/defer_extension_spec.rb

@@ -474,7 +474,18 @@
       json.deferred json.deferred!
     PROPS
 
-    render(props)
+    json = render(props)
+
+    expect(json).to eql_json({
+      outer: {
+        inner: {
+          greeting: {}
+        }
+      },
+      deferred: [
+        {url: "/some_url?props_at=outer.inner.greeting", path: "outer.inner.greeting", type: "auto"}
+      ]
+    })
     json = render(props)
 
     expect(json).to eql_json({