TST: Check that Cython intp conversion uses normal integer rules

seberg · seberg · commit d54da805d3c5 · 2023-11-09T12:12:24.000+01:00
diff --git a/numpy/_core/tests/examples/cython/checks.pyx b/numpy/_core/tests/examples/cython/checks.pyx
@@ -128,3 +128,6 @@ def get_default_integer():
     if cnp.NPY_DEFAULT_INT == cnp.NPY_INTP:
         return cnp.dtype("intp")
     return None
+
+def conv_intp(cnp.intp_t val):
+    return val
diff --git a/numpy/_core/tests/test_cython.py b/numpy/_core/tests/test_cython.py
@@ -192,3 +192,15 @@ def test_multiiter_fields(install_temp, arrays):
             for x, y in zip(bcast.iters, checks.get_multiiter_iters(bcast))
         ]
     )
+
+
+def test_conv_intp(install_temp):
+    import checks
+
+    class myint:
+        def __int__(self):
+            return 3
+
+    # These conversion passes via `__int__`, not `__index__`:
+    assert checks.conv_intp(3.) == 3
+    assert checks.conv_intp(myint()) == 3
