54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
from astrai.data import ResumableDistributedSampler
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def test_random_sampler_consistency(random_dataset):
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"""Test RandomSampler produces consistent results with same seed"""
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dataset = random_dataset
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# Create two samplers with same seed
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sampler1 = ResumableDistributedSampler(dataset, seed=42)
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sampler2 = ResumableDistributedSampler(dataset, seed=42)
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indices1 = list(iter(sampler1))
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indices2 = list(iter(sampler2))
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assert indices1 == indices2
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def test_random_sampler_different_seeds(random_dataset):
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"""Test RandomSampler produces different results with different seeds"""
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dataset = random_dataset
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# Create two samplers with different seeds
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sampler1 = ResumableDistributedSampler(dataset, seed=42)
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sampler2 = ResumableDistributedSampler(dataset, seed=123)
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indices1 = list(iter(sampler1))
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indices2 = list(iter(sampler2))
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# Very high probability they should be different
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assert indices1 != indices2
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def test_sampler_across_epochs(random_dataset):
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"""Test sampler behavior across multiple epochs"""
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dataset = random_dataset
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n = len(dataset)
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sampler = ResumableDistributedSampler(dataset, seed=42)
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# Get indices for first epoch
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epoch1_indices = list(iter(sampler))
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assert len(epoch1_indices) == n
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# Get indices for second epoch
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epoch2_indices = list(iter(sampler))
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assert len(epoch2_indices) == n
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# Check that epochs have different order (should be random)
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assert epoch1_indices != epoch2_indices
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# Check that all indices are present in each epoch
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assert set(epoch1_indices) == set(range(n))
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assert set(epoch2_indices) == set(range(n))
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