coverage: report branch coverage

Author: DannyBen

spec/spec_helper.rb

@@ -4,6 +4,16 @@
   SimpleCov.start do
     enable_coverage :branch
   end
+
+  SimpleCov.at_exit do
+    SimpleCov.result.format!
+
+    result = SimpleCov.result
+    if result.total_branches&.positive?
+      covered_branches_percent = 100.0 * result.covered_branches / result.total_branches
+      puts "Branch coverage: #{result.covered_branches} / #{result.total_branches} branches (#{covered_branches_percent.round(2)}%) covered."
+    end
+  end
 end
 
 require 'rubygems'