Trace hook invocation

src/spectator/example_group.cr

@@ -15,13 +15,19 @@ module Spectator
         parent.call_once_before_all
       end
 
-      hooks.each(&.call)
+      hooks.each do |hook|
+        Log.trace { "Invoking hook #{hook}" }
+        hook.call
+      end
     end
 
     group_event after_all do |hooks|
       Log.trace { "Processing after_all hooks" }
 
-      hooks.each(&.call)
+      hooks.each do |hook|
+        Log.trace { "Invoking hook #{hook}" }
+        hook.call
+      end
 
       if (parent = group?)
         parent.call_once_after_all
@@ -35,13 +41,19 @@ module Spectator
         parent.call_before_each(example)
       end
 
-      hooks.each(&.call(example))
+      hooks.each do |hook|
+        Log.trace { "Invoking hook #{hook}" }
+        hook.call(example)
+      end
     end
 
     example_event after_each do |hooks, example|
       Log.trace { "Processing after_each hooks" }
 
-      hooks.each(&.call(example))
+      hooks.each do |hook|
+        Log.trace { "Invoking hook #{hook}" }
+        hook.call(example)
+      end
 
       if (parent = group?)
         parent.call_after_each(example)

src/spectator/example_group_hook.cr

@@ -28,5 +28,21 @@ module Spectator
     def call : Nil
       @delegate.call
     end
+
+    # Produces the string representation of the hook.
+    # Includes the source and label if they're not nil.
+    def to_s(io)
+      io << "example group hook"
+
+      if (label = @label)
+        io << ' '
+        io << label
+      end
+
+      if (source = @source)
+        io << " @ "
+        io << source
+      end
+    end
   end
 end

src/spectator/example_hook.cr

@@ -30,5 +30,21 @@ module Spectator
     def call(example : Example) : Nil
       @delegate.call(example)
     end
+
+    # Produces the string representation of the hook.
+    # Includes the source and label if they're not nil.
+    def to_s(io)
+      io << "example hook"
+
+      if (label = @label)
+        io << ' '
+        io << label
+      end
+
+      if (source = @source)
+        io << " @ "
+        io << source
+      end
+    end
   end
 end