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BUG: Prediction fails on empty frames #367

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BUG: Prediction fails on empty frames #367

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8 changes: 8 additions & 0 deletions trackpy/tests/test_predict.py
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Original file line number Diff line number Diff line change
Expand Up @@ -86,6 +86,14 @@ def test_simple_predict(self):
pred.link_df_iter, 0.45)
assert all(ll.values == 3)

def test_empty_predict(self):
"""Check what happens if there is an empty frame"""
pred = self.predict_class()
empty = pandas.DataFrame({'x': [], 'y': [], 'frame': []})
ll = get_linked_lengths((self.mkframe(0), self.mkframe(0.25), empty, self.mkframe(0.65)),
pred.link_df_iter, 0.45)
assert all(ll.values == 3)

def test_big_predict(self):
Nside = Nside_oversize
pred = self.predict_class()
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