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# Test internal API defined in wrap.cpp, mostly constructors. These are not normally called from
# client code as contour_generator() defined in Python is preferred.
from __future__ import annotations
from io import StringIO
import sys
from typing import TYPE_CHECKING, TypeAlias
import pytest
from contourpy._contourpy import (
ContourGenerator,
FillType,
LineType,
Mpl2005ContourGenerator,
Mpl2014ContourGenerator,
SerialContourGenerator,
ThreadedContourGenerator,
ZInterp,
)
if TYPE_CHECKING:
KWArgs: TypeAlias = dict[str, int | bool | LineType | FillType | ZInterp]
XYZMask: TypeAlias = tuple[list[list[int]], list[list[int]], list[list[int]], None]
def all_classes() -> list[type[ContourGenerator]]:
return [Mpl2005ContourGenerator, Mpl2014ContourGenerator, SerialContourGenerator,
ThreadedContourGenerator]
def default_kwargs(cls: type[ContourGenerator]) -> KWArgs:
kwargs: KWArgs = {
"x_chunk_size": 0,
"y_chunk_size": 0,
}
if cls == Mpl2005ContourGenerator:
pass
elif cls == Mpl2014ContourGenerator:
kwargs["corner_mask"] = True
else:
kwargs.update({
"line_type": LineType.Separate,
"fill_type": FillType.OuterOffset,
"corner_mask": True,
"quad_as_tri": False,
"z_interp": ZInterp.Linear,
})
if cls == ThreadedContourGenerator:
kwargs["thread_count"] = 1
return kwargs
@pytest.fixture
def xyz_mask() -> XYZMask:
x = [[0, 1], [0, 1]]
y = [[0, 0], [1, 1]]
z = [[1, 2], [3, 4]]
return x, y, z, None
@pytest.mark.parametrize("cls", all_classes())
def test_default(cls: type[ContourGenerator], xyz_mask: XYZMask) -> None:
kwargs = default_kwargs(cls)
cls(*xyz_mask, **kwargs)
@pytest.mark.parametrize("cls", all_classes())
def test_xyz_ndim(cls: type[ContourGenerator], xyz_mask: XYZMask) -> None:
x, y, z, mask = xyz_mask
one_d = [1]
three_d = [[[1]]]
kwargs = default_kwargs(cls)
msg = "x, y and z must all be 2D arrays"
with pytest.raises(ValueError, match=msg):
cls(one_d, y, z, mask, **kwargs)
with pytest.raises(ValueError, match=msg):
cls(three_d, y, z, mask, **kwargs)
with pytest.raises(ValueError, match=msg):
cls(x, one_d, z, mask, **kwargs)
with pytest.raises(ValueError, match=msg):
cls(x, three_d, z, mask, **kwargs)
with pytest.raises(ValueError, match=msg):
cls(x, y, one_d, mask, **kwargs)
with pytest.raises(ValueError, match=msg):
cls(x, y, three_d, mask, **kwargs)
@pytest.mark.parametrize("cls", all_classes())
def test_xyz_shape(cls: type[ContourGenerator], xyz_mask: XYZMask) -> None:
x, y, z, mask = xyz_mask
diff_shape = [[0, 1], [2, 3], [4, 5]]
kwargs = default_kwargs(cls)
msg = "x, y and z arrays must have the same shape"
with pytest.raises(ValueError, match=msg):
cls(diff_shape, y, z, mask, **kwargs)
with pytest.raises(ValueError, match=msg):
cls(x, diff_shape, z, mask, **kwargs)
with pytest.raises(ValueError, match=msg):
cls(x, y, diff_shape, mask, **kwargs)
@pytest.mark.parametrize("cls", all_classes())
def test_xy_at_least_2x2(cls: type[ContourGenerator]) -> None:
kwargs = default_kwargs(cls)
msg = "x, y and z must all be at least 2x2 arrays"
with pytest.raises(ValueError, match=msg):
cls([[1, 2]], [[1, 2]], [[1, 2]], None, **kwargs)
with pytest.raises(ValueError, match=msg):
cls([[1], [2]], [[1], [2]], [[1], [2]], None, **kwargs)
@pytest.mark.parametrize("cls", all_classes())
def test_mask_2d(cls: type[ContourGenerator], xyz_mask: XYZMask) -> None:
x, y, z, _ = xyz_mask
kwargs = default_kwargs(cls)
msg = "mask array must be a 2D array"
with pytest.raises(ValueError, match=msg):
cls(x, y, z, [False, True], **kwargs)
with pytest.raises(ValueError, match=msg):
cls(x, y, z, [[[False, True]]], **kwargs)
@pytest.mark.parametrize("cls", all_classes())
def test_mask_shape(cls: type[ContourGenerator], xyz_mask: XYZMask) -> None:
x, y, z, _ = xyz_mask
kwargs = default_kwargs(cls)
msg = "If mask is set it must be a 2D array with the same shape as z"
with pytest.raises(ValueError, match=msg):
cls(x, y, z, [[False, True]], **kwargs)
with pytest.raises(ValueError, match=msg):
cls(x, y, z, [[False], [True]], **kwargs)
@pytest.mark.parametrize("cls", all_classes())
def test_chunk_size_not_negative(cls: type[ContourGenerator], xyz_mask: XYZMask) -> None:
x, y, z, mask = xyz_mask
kwargs = default_kwargs(cls)
msg = "x_chunk_size and y_chunk_size cannot be negative"
x_kwargs = kwargs.copy()
x_kwargs.update({"x_chunk_size": -1})
with pytest.raises(ValueError, match=msg):
cls(x, y, z, mask, **x_kwargs)
y_kwargs = kwargs.copy()
y_kwargs.update({"y_chunk_size": -1})
with pytest.raises(ValueError, match=msg):
cls(x, y, z, mask, **y_kwargs)
@pytest.mark.parametrize("cls", [SerialContourGenerator, ThreadedContourGenerator])
def test_log_z_not_negative(cls: type[ContourGenerator], xyz_mask: XYZMask) -> None:
x, y, _, mask = xyz_mask
kwargs = default_kwargs(cls)
kwargs["z_interp"] = ZInterp.Log
msg = "z values must be positive if using ZInterp.Log"
z = [[0, 1],[2, 3]]
with pytest.raises(ValueError, match=msg):
cls(x, y, z, mask, **kwargs)
# Ignore z that are masked out
mask = [[True, False], [False, False]]
cls(x, y, z, mask, **kwargs)
@pytest.mark.skipif(sys.platform not in ("darwin", "linux"), reason="sysout redirect not available")
@pytest.mark.parametrize("cls", [SerialContourGenerator, ThreadedContourGenerator])
def test_write_cache(cls: type[ContourGenerator], xyz_mask: XYZMask) -> None:
from wurlitzer import STDOUT, pipes
x, y, z, _ = xyz_mask
mask = [[False, False], [False, True]]
kwargs = default_kwargs(cls)
cg = cls(x, y, z, mask, **kwargs)
cg.filled(2.5, 3.5)
out = StringIO()
with pipes(stdout=out, stderr=STDOUT):
cg._write_cache() # type: ignore[attr-defined]
assert out.getvalue() == \
"---------- Cache ----------\n" \
"j=1 ...e10....... .SW.20.w..... \n" \
"j=0 ....00....... ...n00....... \n" \
" i=0 i=1 \n" \
"---------------------------\n"
cg.lines(2.5)
out = StringIO()
with pipes(stdout=out, stderr=STDOUT):
cg._write_cache() # type: ignore[attr-defined]
assert out.getvalue() == \
"---------- Cache ----------\n" \
"j=1 ...e10....... .SW.10.w..... \n" \
"j=0 ....00....... ...n00....... \n" \
" i=0 i=1 \n" \
"---------------------------\n"
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