External command 'brew test'.

Library/Contributions/examples/brew-test.rb

@@ -0,0 +1,20 @@
+ARGV.formulae.each do |f|
+  # Cannot test uninstalled formulae
+  unless f.installed?
+    puts "#{f.name} not installed"
+    next
+  end
+
+  # Cannot test formulae without a test method
+  unless f.respond_to? :test
+    puts "#{f.name} defines no test"
+    next
+  end
+
+  puts "Testing #{f.name}"
+  begin
+    f.test
+  rescue
+    puts "#{f.name}: failed"
+  end
+end