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# Copyright (C) 2009 by Eric Talevich (eric.talevich@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 Bio.Phylo functions with external dependencies."""
import unittest
from io import StringIO
# Check for any missing dependencies at the top level so we can skip
from Bio import MissingExternalDependencyError
from Bio import Phylo
try:
import matplotlib
except ImportError:
raise MissingExternalDependencyError(
"Install matplotlib if you want to use Bio.Phylo._utils."
) from None
# Don't use the Wx backend for matplotlib, use the simpler postscript
# backend -- we're not going to display or save the plot anyway, so it
# doesn't matter much, as long as it's not Wx. See:
# http://lists.open-bio.org/pipermail/biopython-dev/2012-April/009559.html
matplotlib.use("ps")
try:
from matplotlib import pyplot
except ImportError:
# Can fail here with font problems
raise MissingExternalDependencyError(
"Install matplotlib if you want to use Bio.Phylo._utils."
) from None
# Example PhyloXML file
EX_DOLLO = "PhyloXML/o_tol_332_d_dollo.xml"
EX_APAF = "PhyloXML/apaf.xml"
class UtilTests(unittest.TestCase):
"""Tests for various utility functions."""
def test_draw(self):
"""Run the tree layout algorithm, but don't display it."""
pyplot.ioff() # Turn off interactive display
dollo = Phylo.read(EX_DOLLO, "phyloxml")
apaf = Phylo.read(EX_APAF, "phyloxml")
Phylo.draw(dollo, do_show=False)
Phylo.draw(apaf, do_show=False)
# Fancier options
Phylo.draw(apaf, do_show=False, branch_labels={apaf.root: "Root"})
Phylo.draw(
apaf, do_show=False, branch_labels=lambda c: c.branch_length # noqa: E731
)
def test_draw_with_label_colors_dict(self):
"""Layout tree with label colors as dict.
Run the tree layout algorithm with a label_colors argument passed in
as a dictionary. Don't display tree.
"""
pyplot.ioff() # Turn off interactive display
dollo = Phylo.read(EX_DOLLO, "phyloxml")
apaf = Phylo.read(EX_APAF, "phyloxml")
label_colors_dollo = {"f_50": "red", "f_34": "blue"}
label_colors_apaf = {"22_MOUSE": "red", "18_NEMVE": "blue"}
Phylo.draw(dollo, label_colors=label_colors_dollo, do_show=False)
Phylo.draw(apaf, label_colors=label_colors_apaf, do_show=False)
def test_draw_with_label_colors_callable(self):
"""Layout tree with label colors as callable.
Run the tree layout algorithm with a label_colors argument passed in
as a callable. Don't display tree.
"""
pyplot.ioff() # Turn off interactive display
dollo = Phylo.read(EX_DOLLO, "phyloxml")
apaf = Phylo.read(EX_APAF, "phyloxml")
label_colors_dollo = lambda label: "r" if label == "f_50" else "k" # noqa: E731
label_colors_apaf = lambda label: "r" # noqa: E731
Phylo.draw(dollo, label_colors=label_colors_dollo, do_show=False)
Phylo.draw(apaf, label_colors=label_colors_apaf, do_show=False)
def test_draw_ascii(self):
"""Tree to Graph conversion."""
handle = StringIO()
tree = Phylo.read(EX_APAF, "phyloxml")
Phylo.draw_ascii(tree, file=handle)
Phylo.draw_ascii(tree, file=handle, column_width=120)
handle.close()
if __name__ == "__main__":
runner = unittest.TextTestRunner(verbosity=2)
unittest.main(testRunner=runner)
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