Adjust output formatting for fail-blank mode

README.md

@@ -124,7 +124,7 @@ In no particular order, features that have been implemented and are planned:
 - [ ] Runner
     - [X] Fail fast
     - [ ] Test filtering - by name, context, and tags
-    - [ ] Fail on no tests
+    - [X] Fail on no tests
     - [ ] Randomize test order
     - [ ] Dry run - for validation and checking formatted output
     - [X] Config block in `spec_helper.cr`

src/spectator/formatting/stats_counter.cr

@@ -2,12 +2,12 @@ module Spectator::Formatting
   # Produces a stringified stats counter from result totals.
   private struct StatsCounter
     # Creates the instance with each of the counters.
-    private def initialize(@examples : Int32, @failures : Int32, @errors : Int32, @pending : Int32)
+    private def initialize(@examples : Int32, @failures : Int32, @errors : Int32, @pending : Int32, @failed : Bool)
     end
 
     # Creates the instance from the counters in a report.
     def initialize(report)
-      initialize(report.example_count, report.failed_count, report.error_count, report.pending_count)
+      initialize(report.example_count, report.failed_count, report.error_count, report.pending_count, report.failed?)
     end
 
     # Produces a colorized formatting for the stats,
@@ -15,7 +15,7 @@ module Spectator::Formatting
     def color
       if @errors > 0
         Color.error(self)
-      elsif @failures > 0
+      elsif @failed || @failures > 0
         Color.failure(self)
       elsif @pending > 0
         Color.pending(self)

src/spectator/formatting/suite_summary.cr

@@ -10,12 +10,19 @@ module Spectator::Formatting
     # A block describing each failure is displayed.
     # At the end, the totals and runtime are printed.
     def end_suite(report)
+      ran_anything = report.examples_ran > 0
       @io.puts
       @io.puts
-      failures(report.failures) if report.failed?
+      failures(report.failures) if report.failed? && ran_anything
       stats(report)
       remaining(report) if report.remaining?
-      failure_commands(report.failures) if report.failed?
+      if report.failed?
+        if ran_anything
+          failure_commands(report.failures)
+        else # fail-blank mode.
+          @io.puts Color.failure("Failing because no tests were run (fail-blank)")
+        end
+      end
     end
 
     # Produces the failure section of the summary.