Testing feature detector

tests/detectors/test_feature_detector.py

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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# thumbor imaging service
+# https://github.com/thumbor/thumbor/wiki
+
+# Licensed under the MIT license:
+# http://www.opensource.org/licenses/mit-license
+# Copyright (c) 2011 globo.com timehome@corp.globo.com
+
+from os.path import abspath
+from unittest import TestCase
+import mock
+
+from preggy import expect
+
+from thumbor.detectors.feature_detector import Detector as FeatureDetector
+from thumbor.engines.pil import Engine as PilEngine
+
+
+class FeatureDetectorTestCase(TestCase):
+    def setUp(self):
+        self.context = mock.Mock(request=mock.Mock(focal_points=[]))
+        self.engine = PilEngine(self.context)
+        self.context.modules.engine = self.engine
+
+    def test_should_detect_multiple_points(self):
+        with open(abspath('./tests/fixtures/images/no_face.jpg')) as f:
+            self.engine.load(f.read(), None)
+
+        FeatureDetector(self.context, 0, None).detect(lambda: None)
+        detection_result = self.context.request.focal_points
+        expect(detection_result).to_be_greater_than(1)
+        expect(detection_result[0].origin).to_equal('alignment')
+
+    def test_should_not_detect_points(self):
+        with open(abspath('./tests/fixtures/images/white-block.png')) as f:
+            self.engine.load(f.read(), None)
+
+        FeatureDetector(self.context, 0, []).detect(lambda: None)
+        detection_result = self.context.request.focal_points
+        expect(detection_result).to_length(0)