コード例 #1
0
ファイル: test_hash_utils.py プロジェクト: Gointer/pants
  def test_compute_shard_distribution(self):
    # Check that shard distribution isn't obviously broken.
    nshards = 7
    mean_samples_per_shard = 10000
    nsamples = nshards * mean_samples_per_shard

    distribution = [0] * nshards
    for n in range(0, nsamples):
      shard = Sharder.compute_shard(str(n), nshards)
      distribution[shard] += 1

    variance = sum([(x - mean_samples_per_shard) ** 2 for x in distribution]) / nshards
    stddev = math.sqrt(variance)

    # We arbitrarily assert that a stddev of less than 1% of the mean is good enough
    # for sanity-checking purposes.
    self.assertLess(stddev, 100)
コード例 #2
0
ファイル: test_hash_utils.py プロジェクト: triplequote/pants
  def test_compute_shard_distribution(self):
    # Check that shard distribution isn't obviously broken.
    nshards = 7
    mean_samples_per_shard = 10000
    nsamples = nshards * mean_samples_per_shard

    distribution = [0] * nshards
    for n in range(0, nsamples):
      shard = Sharder.compute_shard(str(n), nshards)
      distribution[shard] += 1

    variance = sum([(x - mean_samples_per_shard) ** 2 for x in distribution]) / nshards
    stddev = math.sqrt(variance)

    # We arbitrarily assert that a stddev of less than 1% of the mean is good enough
    # for sanity-checking purposes.
    self.assertLess(stddev, 100)
コード例 #3
0
ファイル: test_hash_utils.py プロジェクト: zvikihouzz/pants
 def test_compute_shard(self):
     # Spot-check a couple of values, to make sure compute_shard doesn't do something
     # completely degenerate.
     self.assertEqual(31, Sharder.compute_shard('', 42))
     self.assertEqual(35, Sharder.compute_shard('foo', 42))
     self.assertEqual(5, Sharder.compute_shard('bar', 42))
コード例 #4
0
ファイル: test_hash_utils.py プロジェクト: Gointer/pants
 def test_compute_shard(self):
   # Spot-check a couple of values, to make sure compute_shard doesn't do something
   # completely degenerate.
   self.assertEqual(31, Sharder.compute_shard('', 42))
   self.assertEqual(35, Sharder.compute_shard('foo', 42))
   self.assertEqual(5, Sharder.compute_shard('bar', 42))