Add ascend methods

src/spectator/example.cr

@@ -151,6 +151,15 @@ module Spectator
       klass.cast(@context)
     end
 
+    # Yields this example and all parent groups.
+    def ascend
+      node = self
+      while node
+        yield node
+        node = node.group?
+      end
+    end
+
     # Constructs the full name or description of the example.
     # This prepends names of groups this example is part of.
     def to_s(io)

src/spectator/example_group.cr

@@ -72,11 +72,13 @@ module Spectator
 
     delegate size, unsafe_fetch, to: @nodes
 
-    # Creates a child that is attched to the group.
-    # Yields zero or more times to create the child.
-    # The group the child should be attached to is provided as a block argument.
-    def create_child
-      yield self
+    # Yields this group and all parent groups.
+    def ascend
+      group = self
+      while group
+        yield group
+        group = group.group?
+      end
     end
 
     # Removes the specified *node* from the group.