dev-python/contourpy: Grab a fix for running tests on unicore system

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/contourpy/contourpy-1.2.0.ebuild

@@ -42,6 +42,11 @@ DISTUTILS_ARGS=(
 
 distutils_enable_tests pytest
 
+PATCHES=(
+	# https://github.com/contourpy/contourpy/pull/327
+	"${FILESDIR}/${P}-unicore.patch"
+)
+
 python_test() {
 	local EPYTEST_IGNORE=(
 		# linters

dev-python/contourpy/files/contourpy-1.2.0-unicore.patch

@@ -0,0 +1,83 @@
+From f948f821c705329a98bbcdcba5b642fe6c6f0b74 Mon Sep 17 00:00:00 2001
+From: matoro <matoro@users.noreply.github.com>
+Date: Wed, 15 Nov 2023 02:18:49 -0500
+Subject: [PATCH] Support running tests on unicore hosts
+
+All tests pass except those explicitly asserting that they are on a
+multicore system.  Adds a conditional skip to those which are only
+useful on multicore hosts.
+---
+ tests/test_filled.py | 7 +++++--
+ tests/test_lines.py  | 7 +++++--
+ tests/test_misc.py   | 8 +-------
+ 3 files changed, 11 insertions(+), 11 deletions(-)
+
+diff --git a/tests/test_filled.py b/tests/test_filled.py
+index b239f3b..c41e0d1 100644
+--- a/tests/test_filled.py
++++ b/tests/test_filled.py
+@@ -8,7 +8,7 @@
+ from numpy.testing import assert_allclose, assert_array_equal
+ import pytest
+ 
+-from contourpy import FillType, contour_generator
++from contourpy import FillType, contour_generator, max_threads
+ from contourpy.util.data import random, simple
+ 
+ from . import util_test
+@@ -734,7 +734,10 @@ def assert_chunk_offsets(offsets_or_none: list[cpy.OffsetArray | None]) -> None:
+ @pytest.mark.threads
+ @pytest.mark.parametrize("fill_type", FillType.__members__.values())
+ @pytest.mark.parametrize("name, thread_count",
+-                         [("serial", 1), ("threaded", 1), ("threaded", 2)])
++                         [("serial", 1), ("threaded", 1),
++                         pytest.param("threaded", 2,
++                            marks = pytest.mark.skipif(
++                            max_threads() <= 1, reason = "executing on unicore host"))])
+ def test_return_by_fill_type_chunk(
+     xyz_chunk_test: tuple[cpy.CoordinateArray, ...],
+     name: str,
+diff --git a/tests/test_lines.py b/tests/test_lines.py
+index 9608591..0b0833b 100644
+--- a/tests/test_lines.py
++++ b/tests/test_lines.py
+@@ -6,7 +6,7 @@
+ from numpy.testing import assert_allclose, assert_array_equal
+ import pytest
+ 
+-from contourpy import LineType, contour_generator
++from contourpy import LineType, contour_generator, max_threads
+ from contourpy.util.data import random, simple
+ 
+ from . import util_test
+@@ -707,7 +707,10 @@ def test_return_by_line_type(
+ @pytest.mark.threads
+ @pytest.mark.parametrize("line_type", LineType.__members__.values())
+ @pytest.mark.parametrize("name, thread_count",
+-                         [("serial", 1), ("threaded", 1), ("threaded", 2)])
++                         [("serial", 1), ("threaded", 1),
++                         pytest.param("threaded", 2,
++                            marks = pytest.mark.skipif(
++                            max_threads() <= 1, reason = "executing on unicore host"))])
+ def test_return_by_line_type_chunk(
+     xyz_chunk_test: tuple[cpy.CoordinateArray, ...],
+     name: str,
+diff --git a/tests/test_misc.py b/tests/test_misc.py
+index 5e46e3f..acd558a 100644
+--- a/tests/test_misc.py
++++ b/tests/test_misc.py
+@@ -2,13 +2,7 @@
+ 
+ import numpy as np
+ 
+-from contourpy import _remove_z_mask, contour_generator, max_threads
+-
+-
+-def test_max_threads() -> None:
+-    n = max_threads()
+-    # Assume testing on machine with 2 or more cores.
+-    assert n > 1
++from contourpy import _remove_z_mask, contour_generator
+ 
+ 
+ def test_nan() -> None: