add a finishing test

lib/speech/audio_to_text.rb

@@ -21,6 +21,10 @@ def to_text
       JSON.parse(File.read(self.captured_file))
     end
 
+    def clean
+      File.unlink self.captured_file if self.captured_file && File.exist?(self.captured_file)
+    end
+
   protected
 
     def convert_chunk(easy, chunk, options={})

test/audio_to_text_test.rb

@@ -0,0 +1,20 @@
+require 'test/unit'
+$:.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')
+require 'speech'
+
+class SpeechAudioToTextTest < Test::Unit::TestCase
+  def test_audio_to_text
+    audio = Speech::AudioToText.new("i-like-pickles.wav")
+    captured_json = audio.to_text
+    assert captured_json
+    assert captured_json.key?("captured_json")
+    assert !captured_json['captured_json'].empty?
+    assert_equal ['captured_json', 'confidence'], captured_json.keys.sort
+    assert_equal "I like pickles", captured_json['captured_json'].flatten.first
+    assert captured_json['confidence'] > 0.9
+#    {"captured_json"=>[["I like pickles", 0.92731786]], "confidence"=>0.92731786}
+#    puts captured_json.inspect
+  ensure
+    audio.clean
+  end
+end