more robust test, compatibility rails 5.0

Author: ermolaev

test/app/components/cache_component.html.erb

@@ -1 +1 @@
-<%= cache_fragment_name('key') %>
+<%= cache_fragment_name('cache-key').join(':') %>

test/view_component/view_component_test.rb

@@ -673,9 +673,10 @@ def test_inherited_inline_component_inherits_inline_method
   end
 
   def test_cache_digest
-    render_inline(CacheComponent.new)
+    cache_key = render_inline(CacheComponent.new).text
 
-    assert_text "cache_component:86b3c2843d4c0cff8a925eae1eb7353a"
+    assert_includes cache_key, "cache-key"
+    assert_match(/\w{3}/, cache_key.sub("cache-key", ""))
   end
 
 end