134 lines
3.7 KiB
Python
134 lines
3.7 KiB
Python
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import tempfile
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from PIL import Image
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import numpy
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from pathlib import Path
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import pytest
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from pymol import cmd
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def datafile(filename: str) -> Path:
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"""
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Return path to filename, the current directory and the data
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directory are searched for filename.
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:filename: filename to search for
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"""
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if Path(filename).exists():
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return filename
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PYMOL_TESTING_ROOT = 2
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# pymol-testing root
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pymol_test_dir = Path(__file__).parents[PYMOL_TESTING_ROOT]
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return pymol_test_dir.joinpath('data', filename)
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class mktemp(object):
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"""
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Context manager which returns a temporary filename and
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deletes the file in the end, if it exists.
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"""
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def __init__(self, suffix: str = ''):
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self.file = tempfile.NamedTemporaryFile(suffix=suffix, delete=False)
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self.file.close() # Allow other processes to access the file
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self.filename = self.file.name
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def __enter__(self):
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return self.filename
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def __exit__(self, exc_type, exc_value, traceback):
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if Path(self.filename).exists():
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Path(self.filename).unlink()
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def ambientOnly(cmd) -> None:
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"""
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Set up a scene with only ambient lighting.
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"""
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cmd.set('ambient', 1)
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cmd.set('antialias', 0)
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cmd.set('light_count', 1)
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cmd.set('depth_cue', 0)
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# needed for open-source
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cmd.set('reflect', 0)
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cmd.set('direct', 0)
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def get_imagearray(cmd, **kwargs) -> numpy.array:
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"""
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Return the image as a numpy array.
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:kwargs: keyword arguments passed to cmd.png
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"""
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with mktemp('.png') as filename:
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cmd.png(filename, **kwargs)
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img = Image.open(filename)
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return numpy.array(img.getdata(),
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numpy.uint8).reshape((img.size[1], img.size[0], -1))
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def _imageHasColor(cmd, color, img, delta=0) -> bool:
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"""
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Return True if the image contains the given color.
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:color: color to search for
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:img: image as numpy array
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:delta: maximum difference between color and image color
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"""
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if isinstance(color, str):
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color = [int(v*255) for v in cmd.get_color_tuple(color)]
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else:
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color = list(color)
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dim = img.shape[-1]
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if dim == len(color) + 1:
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dim -= 1
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img = img[..., :dim]
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diff = abs(img.reshape((-1, dim)) - color)
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return (diff - delta <= 0).prod(1).sum()
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def imageHasColor(cmd, color: str, delta: float = 0) -> bool:
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"""
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Return True if the image contains the given color.
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:color: color to search for
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:delta: maximum difference between color and image color
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"""
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img = get_imagearray(cmd)
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return _imageHasColor(cmd, color, img, delta)
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def assert_in_names_undo(cmd, name: str) -> None:
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"""
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Assert that the object is in the names list and undoing the
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command removes it from the list.
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:name: name to search for
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"""
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assert name in cmd.get_names()
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cmd.undo()
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assert name not in cmd.get_names()
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cmd.redo()
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assert name in cmd.get_names()
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def compatible_with(version: str) -> bool:
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def tupleize_version(str_: str):
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return tuple(int(x) for x in str_.split('.') if x.isdigit())
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PYMOL_VERSION = cmd.get_version()
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PYMOL_VERSION_TUPLE = tupleize_version(PYMOL_VERSION[0])
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if isinstance(version, int):
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return version <= PYMOL_VERSION[2]
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elif isinstance(version, float):
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return version <= PYMOL_VERSION[1]
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else:
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return tupleize_version(version) <= PYMOL_VERSION_TUPLE
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def requires_version(version, reason=None):
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def decorator(test_func):
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return pytest.mark.skipif(
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not compatible_with(version),
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reason=reason or f"Requires PyMOL {version}"
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)(test_func)
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return decorator
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