Fix minitest pre-push hook

Author: David Rodríguez

config/default.yml

@@ -813,8 +813,8 @@ PrePush:
   Minitest:
     enabled: false
     description: 'Running Minitest test suite'
-    command: ['ruby', '-Ilib:test', 'test']
-    required_library: 'minitest'
+    command: ['ruby', '-Ilib:test', '-rminitest', "-e 'exit! Minitest.run'"]
+    include: 'test/**/*_test.rb'
 
 # Hooks that run during `git rebase`, before any commits are rebased.
 # If a hook fails, the rebase is aborted.

lib/overcommit/hook/pre_push/minitest.rb

@@ -10,5 +10,9 @@ def run
       output = result.stdout + result.stderr
       [:fail, output]
     end
+
+    def command
+      super + included_files.map { |file| "-r#{file}" }
+    end
   end
 end

spec/overcommit/hook/pre_push/minitest_spec.rb

@@ -2,7 +2,7 @@
 
 describe Overcommit::Hook::PrePush::Minitest do
   let(:config)  { Overcommit::ConfigurationLoader.default_configuration }
-  let(:context) { double('context') }
+  let(:context) { double('context', all_files: ['test/test_foo.rb']) }
   subject { described_class.new(config, context) }
 
   context 'when minitest exits successfully' do