Pretty up iterative group names

src/spectator/dsl/groups.cr

@@ -146,6 +146,8 @@ module Spectator::DSL
 
         ::Spectator::DSL::Builder.start_iterative_group(
           %collection,
+          {{collection.stringify}},
+          {{block.args.empty? ? :nil.id : block.args.first.stringify}},
           ::Spectator::Location.new({{block.filename}}, {{block.line_number}}),
           metadata
         )

src/spectator/example_builder.cr

@@ -3,7 +3,7 @@ require "./node_builder"
 module Spectator
   class ExampleBuilder < NodeBuilder
     def initialize(@context_builder : -> Context, @entrypoint : Example ->,
-      @name : String? = nil, @location : Location? = nil, @metadata : Metadata = Metadata.new)
+                   @name : String? = nil, @location : Location? = nil, @metadata : Metadata = Metadata.new)
     end
 
     def build(parent)

src/spectator/iterative_example_group_builder.cr

@@ -3,9 +3,9 @@ require "./example_group_iteration"
 
 module Spectator
   class IterativeExampleGroupBuilder(T) < ExampleGroupBuilder
-    def initialize(@collection : Enumerable(T),
-      location : Location? = nil, metadata : Metadata = Metadata.new)
-      super(nil, location, metadata)
+    def initialize(@collection : Enumerable(T), name : String? = nil, @iterator : String? = nil,
+                   location : Location? = nil, metadata : Metadata = Metadata.new)
+      super(name, location, metadata)
     end
 
     def build(parent = nil)
@@ -16,7 +16,12 @@ module Spectator
         @after_each_hooks.each { |hook| group.add_after_each_hook(hook) }
         @around_each_hooks.each { |hook| group.add_around_each_hook(hook) }
         @collection.each do |item|
-          ExampleGroupIteration.new(item, item.inspect, @location, group).tap do |iteration|
+          name = if iterator = @iterator
+                   "#{iterator}: #{item.inspect}"
+                 else
+                   item.inspect
+                 end
+          ExampleGroupIteration.new(item, name, @location, group).tap do |iteration|
             @children.each(&.build(iteration))
           end
         end

src/spectator/spec_builder.cr

@@ -76,9 +76,9 @@ module Spectator
     #
     # A set of *metadata* can be used for filtering and modifying example behavior.
     # For instance, adding a "pending" tag will mark tests as pending and skip execution.
-    def start_iterative_group(collection, location = nil, metadata = Metadata.new) : Nil
-      Log.trace { "Start iterative group: #{typeof(collection)} @ #{location}; metadata: #{metadata}" }
-      builder = IterativeExampleGroupBuilder.new(collection, location, metadata)
+    def start_iterative_group(collection, name, iterator = nil, location = nil, metadata = Metadata.new) : Nil
+      Log.trace { "Start iterative group: #{name} (#{typeof(collection)}) @ #{location}; metadata: #{metadata}" }
+      builder = IterativeExampleGroupBuilder.new(collection, name, iterator, location, metadata)
       current << builder
       @stack.push(builder)
     end