Add colored output to the new test reporter.

railties/lib/rails/test_unit/minitest_plugin.rb

@@ -49,6 +49,12 @@ def self.plugin_rails_options(opts, options)
       options[:fail_fast] = true
     end
 
+    opts.on("-c", "--[no-]color",
+            "Enable color in the output") do |value|
+      options[:color] = value
+    end
+
+    options[:color] = true
     options[:output_inline] = true
     options[:patterns] = opts.order!
   end
@@ -80,6 +86,8 @@ def self.plugin_rails_init(options)
     # Disable the extra failure output after a run, unless output is deferred.
     self.hide_aggregated_results = options[:output_inline]
 
+    self.reporter.reporters.clear
+    self.reporter << SummaryReporter.new(options[:io], options)
     self.reporter << ::Rails::TestUnitReporter.new(options[:io], options)
   end
 

railties/lib/rails/test_unit/reporter.rb

@@ -6,13 +6,34 @@ class TestUnitReporter < Minitest::StatisticsReporter
     class_attribute :executable
     self.executable = "bin/rails test"
 
+    COLOR_CODES_FOR_RESULTS = {
+      "." => :green,
+      "E" => :red,
+      "F" => :red,
+      "S" => :yellow
+    }
+
+    COLOR_CODES = {
+      red: 31,
+      green: 32,
+      yellow: 33,
+      blue: 34
+    }
+
     def record(result)
       super
+      color = COLOR_CODES_FOR_RESULTS[result.result_code]
+
+      if options[:verbose]
+        io.puts color(format_line(result), color)
+      else
+        io.print color(result.result_code, color)
+      end
 
       if output_inline? && result.failure && (!result.skipped? || options[:verbose])
         io.puts
         io.puts
-        io.puts format_failures(result)
+        io.puts format_failures(result).map { |line| color(line, :red) }
         io.puts
         io.puts format_rerun_snippet(result)
         io.puts
@@ -56,6 +77,10 @@ def fail_fast?
         options[:fail_fast]
       end
 
+      def format_line(result)
+        "%s#%s = %.2f s = %s" % [result.class, result.name, result.time, result.result_code]
+      end
+
       def format_failures(result)
         result.failures.map do |failure|
           "#{failure.result_label}:\n#{result.class}##{result.name}:\n#{failure.message}\n"
@@ -76,5 +101,18 @@ def format_rerun_snippet(result)
       def app_root
         @app_root ||= defined?(ENGINE_ROOT) ? ENGINE_ROOT : Rails.root
       end
+
+      def colored_output?
+        options[:color] && io.respond_to?(:tty?) && io.tty?
+      end
+
+      def color(string, color)
+        if colored_output?
+          color = COLOR_CODES[color]
+          "\e[#{color}m#{string}\e[0m"
+        else
+          string
+        end
+      end
   end
 end

railties/test/test_unit/reporter_test.rb

@@ -1,5 +1,6 @@
 require 'abstract_unit'
 require 'rails/test_unit/reporter'
+require 'minitest/mock'
 
 class TestUnitReporterTest < ActiveSupport::TestCase
   class ExampleTest < Minitest::Test
@@ -61,15 +62,15 @@ def woot; end
     @reporter.record(failed_test)
     @reporter.report
 
-    expect = %r{\A\n\nFailure:\nTestUnitReporterTest::ExampleTest#woot:\nboo\n\nbin/rails test test/test_unit/reporter_test.rb:\d+\n\n\z}
+    expect = %r{\AF\n\nFailure:\nTestUnitReporterTest::ExampleTest#woot:\nboo\n\nbin/rails test test/test_unit/reporter_test.rb:\d+\n\n\z}
     assert_match expect, @output.string
   end
 
   test "outputs errors inline" do
     @reporter.record(errored_test)
     @reporter.report
 
-    expect = %r{\A\n\nError:\nTestUnitReporterTest::ExampleTest#woot:\nArgumentError: wups\n    No backtrace\n\nbin/rails test .*test/test_unit/reporter_test.rb:6\n\n\z}
+    expect = %r{\AE\n\nError:\nTestUnitReporterTest::ExampleTest#woot:\nArgumentError: wups\n    No backtrace\n\nbin/rails test .*test/test_unit/reporter_test.rb:\d+\n\n\z}
     assert_match expect, @output.string
   end
 
@@ -78,7 +79,7 @@ def woot; end
     verbose.record(skipped_test)
     verbose.report
 
-    expect = %r{\A\n\nSkipped:\nTestUnitReporterTest::ExampleTest#woot:\nskipchurches, misstemples\n\nbin/rails test test/test_unit/reporter_test.rb:\d+\n\n\z}
+    expect = %r{\ATestUnitReporterTest::ExampleTest#woot = 10\.00 s = S\n\n\nSkipped:\nTestUnitReporterTest::ExampleTest#woot:\nskipchurches, misstemples\n\nbin/rails test test/test_unit/reporter_test.rb:\d+\n\n\z}
     assert_match expect, @output.string
   end
 
@@ -113,6 +114,36 @@ def woot; end
     assert_no_match 'Failed tests:', @output.string
   end
 
+  test "outputs colored passing results" do
+    @output.stub(:tty?, true) do
+      colored = Rails::TestUnitReporter.new @output, color: true, output_inline: true
+      colored.record(passing_test)
+
+      expect = %r{\e\[32m\.\e\[0m}
+      assert_match expect, @output.string
+    end
+  end
+
+  test "outputs colored skipped results" do
+    @output.stub(:tty?, true) do
+      colored = Rails::TestUnitReporter.new @output, color: true, output_inline: true
+      colored.record(skipped_test)
+
+      expect = %r{\e\[33mS\e\[0m}
+      assert_match expect, @output.string
+    end
+  end
+
+  test "outputs colored failed results" do
+    @output.stub(:tty?, true) do
+      colored = Rails::TestUnitReporter.new @output, color: true, output_inline: true
+      colored.record(errored_test)
+
+      expected = %r{\e\[31mE\e\[0m\n\n\e\[31mError:\nTestUnitReporterTest::ExampleTest#woot:\nArgumentError: wups\n    No backtrace\n\e\[0m}
+      assert_match expected, @output.string
+    end
+  end
+
   private
   def assert_rerun_snippet_count(snippet_count)
     assert_equal snippet_count, @output.string.scan(%r{^bin/rails test }).size
@@ -145,6 +176,7 @@ def skipped_test
                    rescue Minitest::Assertion => e
                      e
                    end
+    st.time = 10
     st
   end
 end