Aliases capture_output to capture_io for test-unit compatiblity.

test/benchmark/test_benchmark.rb

@@ -34,12 +34,8 @@ class TestBenchmark < Test::Unit::TestCase
     end
   end
 
-  def capture_output
-    capture_io { yield }.first.gsub(/[ \-]\d\.\d{6}/, ' --time--')
-  end
-
   def capture_bench_output(type, *args, &block)
-    capture_output { bench(type, *args, &block) }
+    capture_output { bench(type, *args, &block) }.first.gsub(/[ \-]\d\.\d{6}/, ' --time--')
   end
 
   def test_tms_outputs_nicely
@@ -85,7 +81,7 @@ BENCH
 
   def test_bm_returns_an_Array_of_the_times_with_the_labels
     [:bm, :bmbm].each do |meth|
-      capture_io do
+      capture_output do
         results = bench(meth)
         assert_instance_of(Array, results)
         assert_equal(labels.size, results.size)

test/csv/interface/test_read.rb

@@ -104,7 +104,7 @@ class TestCSVInterfaceRead < Test::Unit::TestCase
   end
 
   def test_open_encoding_nonexistent
-    _output, error = capture_io do
+    _output, error = capture_output do
       CSV.open(@input.path, encoding: "nonexistent") do
       end
     end

test/irb/test_context.rb

@@ -68,7 +68,7 @@ module TestIRB
         "_\n",
       ])
       irb = IRB::Irb.new(IRB::WorkSpace.new(Object.new), input)
-      out, err = capture_io do
+      out, err = capture_output do
         irb.eval_input
       end
       assert_empty err

test/webrick/utils.rb

@@ -45,7 +45,7 @@ module TestWEBrick
       :Logger => WEBrick::Log.new(log_ary, WEBrick::BasicLog::WARN),
       :AccessLog => [[access_log_ary, ""]]
     }.update(config))
-    server = capture_io {break klass.new(config)}
+    server = capture_output {break klass.new(config)}
     server_thread = server.start
     server_thread2 = Thread.new {
       server_thread.join

tool/lib/minitest/unit.rb

@@ -480,6 +480,7 @@ module MiniTest
 
       return captured_stdout.string, captured_stderr.string
     end
+    alias capture_output capture_io
 
     ##
     # Captures $stdout and $stderr into strings, using Tempfile to