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biopython/Tests/test_Consensus.py
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  BioSQL/ Bio/ Tests/ Scripts/ Doc/ setup.py

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2024-06-26 15:31:39 +09:00

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Python

# Copyright (C) 2013 by Yanbo Ye (yeyanbo289@gmail.com)
# This code is part of the Biopython distribution and governed by its
# license. Please see the LICENSE file that should have been included
# as part of this package.
"""Unit tests for the Bio.Phylo.Consensus module."""
import os
import tempfile
import unittest
# from io import StringIO
from Bio import Align
from Bio import AlignIO
from Bio import Phylo
from Bio.Phylo import BaseTree
from Bio.Phylo import Consensus
from Bio.Phylo.Consensus import _BitString
from Bio.Phylo.TreeConstruction import DistanceCalculator
from Bio.Phylo.TreeConstruction import DistanceTreeConstructor
temp_dir = tempfile.mkdtemp()
class BitStringTest(unittest.TestCase):
"""Test for _BitString class."""
def test_bitstring(self):
bitstr1 = _BitString("0011")
bitstr2 = _BitString("0101")
bitstr3 = _BitString("0001")
bitstr4 = _BitString("0010")
self.assertRaises(TypeError, _BitString, "10O1")
self.assertEqual(bitstr1 & bitstr2, _BitString("0001"))
self.assertEqual(bitstr1 | bitstr2, _BitString("0111"))
self.assertEqual(bitstr1 ^ bitstr2, _BitString("0110"))
self.assertFalse(bitstr1.contains(bitstr2))
self.assertTrue(bitstr1.contains(bitstr1))
self.assertTrue(bitstr1.contains(bitstr3))
self.assertTrue(bitstr1.contains(bitstr4))
self.assertFalse(bitstr1.independent(bitstr2))
self.assertFalse(bitstr1.independent(bitstr4))
self.assertTrue(bitstr2.independent(bitstr4))
self.assertTrue(bitstr3.independent(bitstr4))
self.assertFalse(bitstr1.iscompatible(bitstr2))
self.assertTrue(bitstr1.iscompatible(bitstr3))
self.assertTrue(bitstr1.iscompatible(bitstr4))
self.assertTrue(bitstr2.iscompatible(bitstr4))
self.assertTrue(bitstr3.iscompatible(bitstr4))
class ConsensusTest(unittest.TestCase):
"""Test for consensus methods."""
def setUp(self):
self.trees = list(Phylo.parse("./TreeConstruction/trees.tre", "newick"))
def test_count_clades(self):
bitstr_counts, len_trees = Consensus._count_clades(self.trees)
self.assertEqual(len_trees, len(self.trees))
self.assertEqual(len(bitstr_counts), 6)
self.assertEqual(bitstr_counts[_BitString("11111")][0], 3)
self.assertEqual(bitstr_counts[_BitString("11000")][0], 2)
self.assertEqual(bitstr_counts[_BitString("00111")][0], 3)
self.assertEqual(bitstr_counts[_BitString("00110")][0], 2)
self.assertEqual(bitstr_counts[_BitString("00011")][0], 1)
self.assertEqual(bitstr_counts[_BitString("01111")][0], 1)
def test_strict_consensus(self):
ref_trees = list(Phylo.parse("./TreeConstruction/strict_refs.tre", "newick"))
# three trees
consensus_tree = Consensus.strict_consensus(self.trees)
# tree_file = StringIO()
# Phylo.write(consensus_tree, tree_file, 'newick')
self.assertTrue(Consensus._equal_topology(consensus_tree, ref_trees[0]))
# tree 1 and tree 2
consensus_tree = Consensus.strict_consensus(self.trees[:2])
# tree_file = StringIO()
# Phylo.write(consensus_tree, tree_file, 'newick')
self.assertTrue(Consensus._equal_topology(consensus_tree, ref_trees[1]))
# tree 1 and tree 3
consensus_tree = Consensus.strict_consensus(self.trees[::2])
# tree_file = StringIO()
# Phylo.write(consensus_tree, tree_file, 'newick')
self.assertTrue(Consensus._equal_topology(consensus_tree, ref_trees[2]))
# tree_file.close()
def test_majority_consensus(self):
ref_trees = Phylo.parse("./TreeConstruction/majority_ref.tre", "newick")
ref_tree = next(ref_trees)
consensus_tree = Consensus.majority_consensus(self.trees)
self.assertTrue(Consensus._equal_topology(consensus_tree, ref_tree))
ref_tree = next(ref_trees)
consensus_tree = Consensus.majority_consensus(self.trees, 1)
self.assertTrue(Consensus._equal_topology(consensus_tree, ref_tree))
def test_adam_consensus(self):
ref_trees = list(Phylo.parse("./TreeConstruction/adam_refs.tre", "newick"))
# three trees
consensus_tree = Consensus.adam_consensus(self.trees)
# tree_file = '/home/yeyanbo/adam.tres'
# tree_file = StringIO()
# Phylo.write(consensus_tree, tree_file, 'newick')
self.assertTrue(Consensus._equal_topology(consensus_tree, ref_trees[0]))
# tree 1 and tree 2
consensus_tree = Consensus.adam_consensus(self.trees[:2])
# tree_file = StringIO()
# Phylo.write(consensus_tree, tree_file, 'newick')
self.assertTrue(Consensus._equal_topology(consensus_tree, ref_trees[1]))
# tree 1 and tree 3
consensus_tree = Consensus.adam_consensus(self.trees[::2])
# tree_file = StringIO()
# Phylo.write(consensus_tree, tree_file, 'newick')
self.assertTrue(Consensus._equal_topology(consensus_tree, ref_trees[2]))
# tree_file.close()
def test_get_support(self):
support_tree = Consensus.get_support(self.trees[0], self.trees)
clade = support_tree.common_ancestor(
[support_tree.find_any(name="Beta"), support_tree.find_any(name="Gamma")]
)
self.assertEqual(clade.confidence, 2 * 100.0 / 3)
clade = support_tree.common_ancestor(
[support_tree.find_any(name="Alpha"), support_tree.find_any(name="Beta")]
)
self.assertEqual(clade.confidence, 3 * 100.0 / 3)
clade = support_tree.common_ancestor(
[support_tree.find_any(name="Delta"), support_tree.find_any(name="Epsilon")]
)
self.assertEqual(clade.confidence, 2 * 100.0 / 3)
class BootstrapTest(unittest.TestCase):
"""Test for bootstrap methods."""
def setUp(self):
self.msa = AlignIO.read("TreeConstruction/msa.phy", "phylip")
self.alignment = Align.read("TreeConstruction/msa.phy", "phylip")
def test_bootstrap(self):
msa_list = list(Consensus.bootstrap(self.msa, 100))
self.assertEqual(len(msa_list), 100)
self.assertEqual(len(msa_list[0]), len(self.msa))
self.assertEqual(len(msa_list[0][0]), len(self.msa[0]))
def test_bootstrap_trees_msa(self):
calculator = DistanceCalculator("blosum62")
constructor = DistanceTreeConstructor(calculator)
trees = list(Consensus.bootstrap_trees(self.msa, 100, constructor))
self.assertEqual(len(trees), 100)
self.assertIsInstance(trees[0], BaseTree.Tree)
def test_bootstrap_trees(self):
calculator = DistanceCalculator("blosum62")
constructor = DistanceTreeConstructor(calculator)
trees = list(Consensus.bootstrap_trees(self.alignment, 100, constructor))
self.assertEqual(len(trees), 100)
self.assertIsInstance(trees[0], BaseTree.Tree)
def test_bootstrap_consensus_msa(self):
calculator = DistanceCalculator("blosum62")
constructor = DistanceTreeConstructor(calculator, "nj")
tree = Consensus.bootstrap_consensus(
self.msa, 100, constructor, Consensus.majority_consensus
)
self.assertIsInstance(tree, BaseTree.Tree)
Phylo.write(tree, os.path.join(temp_dir, "bootstrap_consensus.tre"), "newick")
def test_bootstrap_consensus(self):
calculator = DistanceCalculator("blosum62")
constructor = DistanceTreeConstructor(calculator, "nj")
tree = Consensus.bootstrap_consensus(
self.alignment, 100, constructor, Consensus.majority_consensus
)
self.assertIsInstance(tree, BaseTree.Tree)
Phylo.write(tree, os.path.join(temp_dir, "bootstrap_consensus.tre"), "newick")
if __name__ == "__main__":
runner = unittest.TextTestRunner(verbosity=2)
unittest.main(testRunner=runner)