TST: add IS_EDITABLE to numpy.testing

Also make it work with meson-python 0.15.0 (that returns an empty list
for `__path__`).

Author: rgommers

numpy/random/tests/test_extending.py

@@ -10,7 +10,7 @@
 import warnings
 
 import numpy as np
-from numpy.testing import IS_WASM
+from numpy.testing import IS_WASM, IS_EDITABLE
 
 
 try:
@@ -47,7 +47,7 @@
 
 
 @pytest.mark.skipif(
-    'editable' in np.__path__[0],
+    IS_EDITABLE,
     reason='Editable install cannot find .pxd headers'
 )
 @pytest.mark.skipif(

numpy/testing/_private/utils.py

@@ -39,7 +39,8 @@
         'SkipTest', 'KnownFailureException', 'temppath', 'tempdir', 'IS_PYPY',
         'HAS_REFCOUNT', "IS_WASM", 'suppress_warnings', 'assert_array_compare',
         'assert_no_gc_cycles', 'break_cycles', 'HAS_LAPACK64', 'IS_PYSTON',
-        '_OLD_PROMOTION', 'IS_MUSL', '_SUPPORTS_SVE', 'NOGIL_BUILD'
+        '_OLD_PROMOTION', 'IS_MUSL', '_SUPPORTS_SVE', 'NOGIL_BUILD',
+        'IS_EDITABLE'
         ]
 
 
@@ -54,6 +55,7 @@ class KnownFailureException(Exception):
 IS_WASM = platform.machine() in ["wasm32", "wasm64"]
 IS_PYPY = sys.implementation.name == 'pypy'
 IS_PYSTON = hasattr(sys, "pyston_version_info")
+IS_EDITABLE = not bool(np.__path__) or 'editable' in np.__path__[0]
 HAS_REFCOUNT = getattr(sys, 'getrefcount', None) is not None and not IS_PYSTON
 HAS_LAPACK64 = numpy.linalg._umath_linalg._ilp64