def test_weight_assigned_correctly(self):
self.assertAlmostEquals(2.955684590875269,
frecency.score_item([50, 30, 600, 200], 600),
places=10)
self.assertAlmostEquals(2.3168950227541245,
frecency.score_item([50, 30.4, 200], 330),
places=10)
self.assertAlmostEquals(0.2865047968601901,
frecency.score_item([500], 400),
places=10)
def test_negative_recency_works(self):
self.assertAlmostEquals(5.859195364518158,
frecency.score_item([50, -10, 60, 200, -500], 600),
places=10)
self.assertAlmostEquals(6.804121392023058,
frecency.score_item([-300, 12, -72.5, 120, -50], 300),
places=10)
self.assertAlmostEquals(1.9477340410546757,
frecency.score_item([-200], 300),
places=10)
self.assertAlmostEquals(6.905469613962053,
frecency.score_item([-50, -10, -60, -200, -500], 600),
places=10)
def test_empty_list_returns_zero(self):
self.assertEquals(0, frecency.score_item([], 600))
self.assertEquals(0, frecency.score_item([], 10.2))
self.assertEquals(0, frecency.score_item([], 0))
self.assertEquals(0, frecency.score_item([], -600))
