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diff --git a/silx/image/test/test_bb.py b/silx/image/test/test_bb.py
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+++ b/silx/image/test/test_bb.py
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+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2016 European Synchrotron Radiation Facility
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# ###########################################################################*/
+"""Basic tests for Bounding box"""
+
+__authors__ = ["H. Payno"]
+__license__ = "MIT"
+__date__ = "27/09/2019"
+
+
+import unittest
+import numpy
+from silx.image._boundingbox import _BoundingBox
+
+
+class TestBB(unittest.TestCase):
+    """Some simple test on the bounding box class"""
+    def test_creation(self):
+        """test some constructors"""
+        pts = numpy.array([(0, 0), (10, 20), (20, 0)])
+        bb = _BoundingBox.from_points(pts)
+        self.assertTrue(bb.bottom_left == (0, 0))
+        self.assertTrue(bb.top_right == (20, 20))
+        pts = numpy.array([(0, 10), (10, 20), (45, 30), (35, 0)])
+        bb = _BoundingBox.from_points(pts)
+        self.assertTrue(bb.bottom_left == (0, 0))
+        print(bb.top_right)
+        self.assertTrue(bb.top_right == (45, 30))
+
+    def test_isIn_pt(self):
+        """test the isIn function with points"""
+        bb = _BoundingBox(bottom_left=(6, 2), top_right=(12, 6))
+        self.assertTrue(bb.contains((10, 4)))
+        self.assertTrue(bb.contains((6, 2)))
+        self.assertTrue(bb.contains((12, 2)))
+        self.assertFalse(bb.contains((0, 0)))
+        self.assertFalse(bb.contains((20, 0)))
+        self.assertFalse(bb.contains((10, 0)))
+
+    def test_collide(self):
+        """test the collide function"""
+        bb1 = _BoundingBox(bottom_left=(6, 2), top_right=(12, 6))
+        self.assertTrue(bb1.collide(_BoundingBox(bottom_left=(6, 2), top_right=(12, 6))))
+        bb1 = _BoundingBox(bottom_left=(6, 2), top_right=(12, 6))
+        self.assertFalse(bb1.collide(_BoundingBox(bottom_left=(12, 2), top_right=(12, 2))))
+
+    def test_isIn_bb(self):
+        """test the isIn function with other bounding box"""
+        bb1 = _BoundingBox(bottom_left=(6, 2), top_right=(12, 6))
+        self.assertTrue(bb1.contains(_BoundingBox(bottom_left=(6, 2), top_right=(12, 6))))
+        bb1 = _BoundingBox(bottom_left=(6, 2), top_right=(12, 6))
+        self.assertTrue(bb1.contains(_BoundingBox(bottom_left=(12, 2), top_right=(12, 2))))
+        self.assertFalse(_BoundingBox(bottom_left=(12, 2), top_right=(12, 2)).contains(bb1))
+
+
+def suite():
+    test_suite = unittest.TestSuite()
+    for TestClass in (TestBB,):
+        test_suite.addTest(
+            unittest.defaultTestLoader.loadTestsFromTestCase(TestClass))
+    return test_suite
+
+
+if __name__ == '__main__':
+    unittest.main(defaultTest='suite')