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from __future__ import print_function
import numpy
import pytest
import struct
from stl import mesh
_STL_FILE = '''
solid test.stl
facet normal -0.014565 0.073223 -0.002897
outer loop
vertex 0.399344 0.461940 1.044090
vertex 0.500000 0.500000 1.500000
vertex 0.576120 0.500000 1.117320
endloop
endfacet
endsolid test.stl
'''.lstrip()
def test_valid_ascii(tmpdir, speedups):
tmp_file = tmpdir.join('tmp.stl')
with tmp_file.open('w+') as fh:
fh.write(_STL_FILE)
fh.seek(0)
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
def test_ascii_with_missing_name(tmpdir, speedups):
tmp_file = tmpdir.join('tmp.stl')
with tmp_file.open('w+') as fh:
# Split the file into lines
lines = _STL_FILE.splitlines()
# Remove everything except solid
lines[0] = lines[0].split()[0]
# Join the lines to test files that start with solid without space
fh.write('\n'.join(lines))
fh.seek(0)
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
def test_ascii_with_blank_lines(tmpdir, speedups):
_stl_file = '''
solid test.stl
facet normal -0.014565 0.073223 -0.002897
outer loop
vertex 0.399344 0.461940 1.044090
vertex 0.500000 0.500000 1.500000
vertex 0.576120 0.500000 1.117320
endloop
endfacet
endsolid test.stl
'''.lstrip()
tmp_file = tmpdir.join('tmp.stl')
with tmp_file.open('w+') as fh:
fh.write(_stl_file)
fh.seek(0)
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
def test_incomplete_ascii_file(tmpdir, speedups):
tmp_file = tmpdir.join('tmp.stl')
with tmp_file.open('w+') as fh:
fh.write('solid some_file.stl')
fh.seek(0)
with pytest.raises(AssertionError):
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
for offset in (-20, 82, 100):
with tmp_file.open('w+') as fh:
fh.write(_STL_FILE[:-offset])
fh.seek(0)
with pytest.raises(AssertionError):
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
def test_corrupt_ascii_file(tmpdir, speedups):
tmp_file = tmpdir.join('tmp.stl')
with tmp_file.open('w+') as fh:
fh.write(_STL_FILE)
fh.seek(40)
print('####\n' * 100, file=fh)
fh.seek(0)
with pytest.raises(AssertionError):
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
with tmp_file.open('w+') as fh:
fh.write(_STL_FILE)
fh.seek(40)
print(' ' * 100, file=fh)
fh.seek(80)
fh.write(struct.pack('<i', 10).decode('utf-8'))
fh.seek(0)
with pytest.raises(AssertionError):
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
def test_corrupt_binary_file(tmpdir, speedups):
tmp_file = tmpdir.join('tmp.stl')
with tmp_file.open('w+') as fh:
fh.write('#########\n' * 8)
fh.write('#\0\0\0')
fh.seek(0)
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
with tmp_file.open('w+') as fh:
fh.write('#########\n' * 9)
fh.seek(0)
with pytest.raises(AssertionError):
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
with tmp_file.open('w+') as fh:
fh.write('#########\n' * 8)
fh.write('#\0\0\0')
fh.seek(0)
fh.write('solid test.stl')
fh.seek(0)
mesh.Mesh.from_file(str(tmp_file), fh=fh, speedups=speedups)
def test_duplicate_polygons():
data = numpy.zeros(3, dtype=mesh.Mesh.dtype)
data['vectors'][0] = numpy.array([[0, 0, 0],
[1, 0, 0],
[0, 1, 1.]])
data['vectors'][0] = numpy.array([[0, 0, 0],
[2, 0, 0],
[0, 2, 1.]])
data['vectors'][0] = numpy.array([[0, 0, 0],
[3, 0, 0],
[0, 3, 1.]])
assert not mesh.Mesh(data, remove_empty_areas=False).check()
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