Return true from run method if successful

src/spectator/spec.cr

@@ -13,7 +13,9 @@ module Spectator
     end
 
     # Runs all selected examples and returns the results.
-    def run
+    # True will be returned if the spec ran successfully,
+    # or false if there was at least one failure.
+    def run : Bool
       runner = Runner.new(examples, @config.formatter, @config.run_flags)
       runner.run
     end

src/spectator/spec/runner.cr

@@ -34,9 +34,7 @@ module Spectator
         profile = Profile.generate(@examples) if @run_flags.profile? && report.counts.run > 0
         summarize(report, profile)
 
-        false # TODO: Report real result
-
-
+        report.counts.fail.zero?
       ensure
         close
       end