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Diffstat (limited to 'Lib/test/test_statistics.py')
| -rw-r--r-- | Lib/test/test_statistics.py | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Lib/test/test_statistics.py b/Lib/test/test_statistics.py index 70d269d..3e6e17a 100644 --- a/Lib/test/test_statistics.py +++ b/Lib/test/test_statistics.py @@ -1972,6 +1972,27 @@ class TestFMean(unittest.TestCase): with self.assertRaises(ValueError): fmean([Inf, -Inf]) + def test_weights(self): + fmean = statistics.fmean + StatisticsError = statistics.StatisticsError + self.assertEqual( + fmean([10, 10, 10, 50], [0.25] * 4), + fmean([10, 10, 10, 50])) + self.assertEqual( + fmean([10, 10, 20], [0.25, 0.25, 0.50]), + fmean([10, 10, 20, 20])) + self.assertEqual( # inputs are iterators + fmean(iter([10, 10, 20]), iter([0.25, 0.25, 0.50])), + fmean([10, 10, 20, 20])) + with self.assertRaises(StatisticsError): + fmean([10, 20, 30], [1, 2]) # unequal lengths + with self.assertRaises(StatisticsError): + fmean(iter([10, 20, 30]), iter([1, 2])) # unequal lengths + with self.assertRaises(StatisticsError): + fmean([10, 20], [-1, 1]) # sum of weights is zero + with self.assertRaises(StatisticsError): + fmean(iter([10, 20]), iter([-1, 1])) # sum of weights is zero + # === Tests for variances and standard deviations === |