add more test on compressor logic

tests/tests/compressor.py

+import base64
 import os
 
+from mock import patch
+
 from django.test import TestCase
 
 from pipeline.conf import settings
 from pipeline.compressors import Compressor
 from pipeline.compressors.yui import YUICompressor
 
+
 class CompressorTest(TestCase):
     def setUp(self):
+        self.compressor = Compressor()
         self.old_pipeline_url = settings.PIPELINE_URL
+        self.old_pipeline_root = settings.PIPELINE_ROOT
         settings.PIPELINE_URL = 'http://localhost/static/'
 
     def test_js_compressor_class(self):
-        compressor = Compressor()
-        self.assertEquals(compressor.js_compressor, YUICompressor)
+        self.assertEquals(self.compressor.js_compressor, YUICompressor)
 
     def test_css_compressor_class(self):
-        compressor = Compressor()
-        self.assertEquals(compressor.css_compressor, YUICompressor)
+        self.assertEquals(self.compressor.css_compressor, YUICompressor)
 
     def test_concatenate_and_rewrite(self):
-        compressor = Compressor()
-        css = compressor.concatenate_and_rewrite([
-            os.path.join(settings.PIPELINE_ROOT, 'css/first.css'),
-            os.path.join(settings.PIPELINE_ROOT, 'css/second.css')
+        css = self.compressor.concatenate_and_rewrite([
+            'css/first.css',
+            'css/second.css'
         ])
         self.assertEquals(""".concat {\n  display: none;\n}\n.concatenate {\n  display: block;\n}""", css)
 
     def test_concatenate(self):
-        compressor = Compressor()
-        js = compressor.concatenate([
-            os.path.join(settings.PIPELINE_ROOT, 'js/first.js'),
-            os.path.join(settings.PIPELINE_ROOT, 'js/second.js')
+        js = self.compressor.concatenate([
+            'js/first.js',
+            'js/second.js'
         ])
         self.assertEquals("""(function() { function concat() {\n  console.log(arguments);\n}\nfunction cat() {\n  console.log("hello world");\n} }).call(this);""", js)
 
+    @patch.object(base64, 'b64encode')
+    def test_encoded_content(self, mock):
+        encoded = self.compressor.encoded_content('images/arrow.png')
+        self.assertTrue(mock.called)
+        mock.reset_mock()
+        encoded = self.compressor.encoded_content('images/arrow.png')
+        self.assertFalse(mock.called)
+
+    def test_relative_path(self):
+        settings.PIPELINE_ROOT = '/var/www/static/'
+        relative_path = self.compressor.relative_path('/var/www/static/images/sprite.png')
+        self.assertEquals(relative_path, '/images/sprite.png')
+
+    def test_absolute_path(self):
+        absolute_path = self.compressor.absolute_path('../../images/sprite.png',
+            'css/plugins/gallery.css')
+        self.assertEquals(absolute_path, 'images/sprite.png')
+        absolute_path = self.compressor.absolute_path('/images/sprite.png',
+            'css/plugins/gallery.css')
+        self.assertEquals(absolute_path, '/images/sprite.png')
+
+    def test_template_name(self):
+        name = self.compressor.template_name('templates/photo/detail.jst',
+            'templates/')
+        self.assertEquals(name, 'photo_detail')
+        name = self.compressor.template_name('templates/photo_edit.jst', '')
+        self.assertEquals(name, 'photo_edit')
+
+    def test_embeddable(self):
+        self.assertFalse(self.compressor.embeddable('images/sprite.png', None))
+        self.assertFalse(self.compressor.embeddable('images/arrow.png', 'datauri'))
+        self.assertTrue(self.compressor.embeddable('images/embed/arrow.png', 'datauri'))
+        self.assertFalse(self.compressor.embeddable('images/arrow.dat', 'datauri'))
+
+    def test_construct_asset_path(self):
+        asset_path = self.compressor.construct_asset_path("../../images/sprite.png",
+            "css/plugins/gallery.css")
+        self.assertEquals(asset_path, "http://localhost/static/images/sprite.png")
+        asset_path = self.compressor.construct_asset_path("/images/sprite.png",
+            "css/plugins/gallery.css")
+        self.assertEquals(asset_path, "http://localhost/static/images/sprite.png")
+
     def test_url_rewrite(self):
-        compressor = Compressor()
-        output = compressor.concatenate_and_rewrite([
-            os.path.join(settings.PIPELINE_ROOT, 'css/urls.css'),
+        output = self.compressor.concatenate_and_rewrite([
+            'css/urls.css',
         ])
         self.assertEquals(""".relative-url {
   background-image: url(http://localhost/static/images/sprite-buttons.png);
@@ -52,3 +95,4 @@ class CompressorTest(TestCase):
 
     def tearDown(self):
         settings.PIPELINE_URL = self.old_pipeline_url
+        settings.PIPELINE_ROOT = self.old_pipeline_root