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# Copyright (c) 2021, Manfred Moitzi
# License: MIT License
from typing import List
import pytest
import ezdxf
from ezdxf.disassemble import recursive_decompose
from ezdxf.entities import Point, Insert
@pytest.fixture(scope="module")
def doc():
d = ezdxf.new()
l0 = d.blocks.new("L0")
build_level_0(l0)
l1 = d.blocks.new("L1")
build_nesting_level_1(l1)
return d
def build_level_0(l0):
# Block of 4 lines in 4 different colors
l0.add_line((1, -1), (1, 1), dxfattribs={"color": 1})
l0.add_line((1, 1), (-1, 1), dxfattribs={"color": 2})
l0.add_line((-1, 1), (-1, -1), dxfattribs={"color": 3})
l0.add_line((-1, -1), (1, -1), dxfattribs={"color": 4})
def scale(sx, sy, sz):
return {
"xscale": sx,
"yscale": sy,
"zscale": sz,
}
def build_nesting_level_1(l1, name="L0"):
l1.add_blockref(name, (0, 0), dxfattribs=scale(1, 1, 1))
l1.add_blockref(name, (3, 0), dxfattribs=scale(-1, 1, 1))
l1.add_blockref(name, (6, 0), dxfattribs=scale(1, -1, 1))
l1.add_blockref(name, (9, 0), dxfattribs=scale(-1, -1, 1))
l1.add_blockref(name, (0, 3), dxfattribs=scale(1, 1, -1))
l1.add_blockref(name, (3, 3), dxfattribs=scale(-1, 1, -1))
l1.add_blockref(name, (6, 3), dxfattribs=scale(1, -1, -1))
l1.add_blockref(name, (9, 3), dxfattribs=scale(-1, -1, -1))
def count(doc, block_names) -> int:
count = 1
for name in block_names:
block = doc.blocks.get(name)
count *= len(block)
return count
def test_decompose_block_level_0(doc):
l0 = doc.blocks.get("L0")
result = list(recursive_decompose(l0))
assert len(result) == count(doc, ["L0"])
REFLECTIONS = [(1, 1, 1), (-1, 1, 1), (1, -1, 1), (1, 1, -1)]
NAMES = [
"normal",
"reflect-x",
"reflect-y",
"reflect-z",
]
@pytest.mark.parametrize("sx,sy,sz", REFLECTIONS, ids=NAMES)
def test_decompose_block_reference_level_0(doc, sx, sy, sz):
msp = doc.modelspace()
msp.delete_all_entities()
msp.add_blockref("L0", (0, 0), dxfattribs=scale(sx, sy, sz))
result = list(recursive_decompose(msp))
assert len(result) == count(doc, ["L0"])
def test_decompose_block_level_1(doc):
l1 = doc.blocks.get("L1")
types = [e.dxftype() for e in recursive_decompose(l1)]
assert len(types) == count(doc, ["L0", "L1"])
assert set(types) == {"LINE"}, "expected only LINES"
@pytest.mark.parametrize("sx,sy,sz", REFLECTIONS, ids=NAMES)
def test_decompose_block_reference_level_1(doc, sx, sy, sz):
msp = doc.modelspace()
msp.delete_all_entities()
msp.add_blockref("L1", (0, 0), dxfattribs=scale(sx, sy, sz))
types = [e.dxftype() for e in recursive_decompose(msp)]
assert len(types) == count(doc, ["L0", "L1"])
assert set(types) == {"LINE"}, "expected only LINES"
def test_decompose_minsert_level_1(doc):
nrows = 2
ncols = 2
expected_count = count(doc, ["L0", "L1"]) * nrows * ncols
msp = doc.modelspace()
msp.delete_all_entities()
msp.add_blockref(
"L1",
(0, 0),
dxfattribs={
"row_count": nrows,
"row_spacing": 5,
"column_count": ncols,
"column_spacing": 5,
},
)
types = [e.dxftype() for e in recursive_decompose(msp)]
assert len(types) == expected_count
assert set(types) == {"LINE"}, "expected only LINES"
class TestSourceBlockReferences:
@pytest.fixture(scope="class")
def doc(self):
doc_ = ezdxf.new()
blk0 = doc_.blocks.new("BLK0")
blk1 = doc_.blocks.new("BLK1")
blk2 = doc_.blocks.new("BLK2")
blk2.add_point((2, 1))
blk2.add_point((2, 2))
blk1.add_point((1, 1))
blk1.add_point((1, 2))
# block reference 2
blk1.add_blockref("BLK2", (2, 2))
blk0.add_point((0, 1))
blk0.add_point((0, 2))
# block reference 1
blk0.add_blockref("BLK1", (1, 1))
# block reference 0
doc_.modelspace().add_blockref("BLK0", (0, 0))
return doc_
@pytest.fixture(scope="class")
def entities(self, doc):
return list(recursive_decompose(doc.modelspace()))
def test_count_of_expected_virtual_entities(self, entities: List[Point]):
"""The virtual INSERT entities are not returned by the
recursive_decompose() function.
"""
assert len(entities) == 6, "expected only 6 POINT entities"
def test_same_source_block_references_blk0(self, entities):
"""Entities from the same INSERT entity have the same virtual source
block reference.
"""
insert0 = entities[0].source_block_reference
insert1 = entities[1].source_block_reference
assert isinstance(insert0, Insert)
assert insert0 is insert1
assert insert0.dxf.name == "BLK0"
def test_same_source_block_references_blk1(self, entities):
"""Entities from the same INSERT entity have the same virtual source
block reference.
"""
insert0 = entities[2].source_block_reference
insert1 = entities[3].source_block_reference
assert insert0 is insert1
assert insert0.dxf.name == "BLK1"
def test_same_source_block_references_blk2(self, entities):
"""Entities from the same INSERT entity have the same virtual source
block reference.
"""
insert0 = entities[4].source_block_reference
insert1 = entities[5].source_block_reference
assert insert0 is insert1
assert insert0.dxf.name == "BLK2"
def test_link_structure_of_virtual_block_references(self, entities):
"""It is possible to trace back the nesting structure of the block
references by the source_block_reference property of the virtual
INSERT entities.
"""
blkref0 = entities[0].source_block_reference
blkref1 = entities[2].source_block_reference
blkref2 = entities[4].source_block_reference
# blkref2 resides in blkref1
assert blkref2.source_block_reference is blkref1
# and blkref1 resides in blkref0
assert blkref1.source_block_reference is blkref0
# and blkref0 has no source_block_reference
assert blkref0.source_block_reference is None
if __name__ == "__main__":
pytest.main([__file__])
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