Display summary from default formatter

src/spectator/formatters/default_formatter.cr

@@ -9,6 +9,9 @@ module Spectator
 
       def end_suite(results : TestResults)
         puts
+        puts
+        puts finish_time_string(results)
+        puts result_string(results)
       end
 
       def start_example(example : Example)
@@ -26,6 +29,22 @@ module Spectator
           "F".colorize.red
         end
       end
+
+      private def finish_time_string(results)
+        "Finished in #{human_time(results.runtime)}"
+      end
+
+      private def result_string(results)
+        examples = results.examples
+        failures = results.failed_examples
+        errors = results.errored_examples
+        pending = results.pending_examples
+        "#{examples} examples, #{failures} failures, #{errors} errors, #{pending} pending"
+      end
+
+      private def human_time(span : Time::Span)
+        span.to_s
+      end
     end
   end
 end

src/spectator/test_results.cr

@@ -8,12 +8,24 @@ module Spectator
       @results = results.to_a
     end
 
+    def examples
+      @results.size
+    end
+
     def successful_examples
-      @results.select { |result| result.successful? }
+      @results.count(&.successful?)
     end
 
     def failed_examples
-      @results.select { |result| result.failed? }
+      @results.count(&.failed?)
+    end
+
+    def errored_examples
+      @results.count(&.errored?)
+    end
+
+    def pending_examples
+      @results.count(&.pending?)
     end
 
     def example_runtime