new_contents: # coding: utf-8
  import os.path
  import unittest
  from pgmagick import api
  from pgmagick import Image, Geometry, Blob
  
  
  class TestCookbook(unittest.TestCase):
  
      def setUp(self):
          self.tmp_filename_jpg = "_cookbook_test.jpg"
          self.tmp_filename_png = "_cookbook_test.png"
  
      def tearDown(self):
          if os.path.exists(self.tmp_filename_jpg):
              os.remove(self.tmp_filename_jpg)
          if os.path.exists(self.tmp_filename_png):
              os.remove(self.tmp_filename_png)
  
      def test_red_background_jpeg_image(self):
          img = api.Image((300, 200), 'red')
          img.write(self.tmp_filename_jpg)
  
      def test_transparent_png_image(self):
          img = api.Image((300, 200), 'transparent')
          img.write(self.tmp_filename_png)
  
      def test_gradient_png_image(self):
          img = api.Image((300, 200), 'gradient:#ffffff-#000000')
          img.write(self.tmp_filename_png)
  
      def test_annotate(self):
          img = api.Image((300, 200))
          img.annotate('Hello World')
          img.write(self.tmp_filename_png)
  
      def test_annotate_with_angle45(self):
          img = api.Image((300, 200))
          img.annotate('Hello World', angle=45)
          img.write(self.tmp_filename_png)
  
      def test_annotate_with_japanese_font(self):
          img = api.Image((300, 200))
          img.font("/usr/share/fonts/truetype/ttf-japanese-gothic.ttf")
          img.annotate('ようこそpgmagickへ!!')
          img.write(self.tmp_filename_png)
  
      def test_scale(self):
          img = api.Image((300, 200), 'blue')
          img.write(self.tmp_filename_png)
          img2 = api.Image(self.tmp_filename_png)
          img2.scale(0.5)
          img2.write(self.tmp_filename_png)
          self.assertEqual(img2.width, 150)
          self.assertEqual(img2.height, 100)
  
      def test_scale_with_lanczos(self):
          img = api.Image((300, 200), 'blue')
          img.write(self.tmp_filename_png)
          img2 = api.Image(self.tmp_filename_png)
          img2.scale((150, 100), 'lanczos')
          img2.write(self.tmp_filename_png)
          self.assertEqual(img2.width, 150)
          self.assertEqual(img2.height, 100)
  
      def test_scale_jpeg(self):
          img = api.Image((400, 400), 'blue')
          img.write(self.tmp_filename_jpg)
          img2 = Image(Blob(open(self.tmp_filename_jpg).read()),
                       Geometry(200, 200))
          img2.scale('200x200')
          img2.write(self.tmp_filename_jpg)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: add unit test for example of cookbook