TST: Add tests for bugs fixed in gh-17068.

- Invalid conversion error bug.
- ``__array_interface__['descr']`` bug

1 files changed, 13 insertions, 0 deletions

diff --git a/numpy/core/tests/test_regression.py b/numpy/core/tests/test_regression.py
index 51cf7039f..f778d4d7c 100644
--- a/numpy/core/tests/test_regression.py
+++ b/numpy/core/tests/test_regression.py
@@ -2488,3 +2488,16 @@ class TestRegression:
         assert arr.size * arr.itemsize > 2 ** 31
         c_arr = np.ctypeslib.as_ctypes(arr)
         assert_equal(c_arr._length_, arr.size)
+
+    def test_complex_conversion_error(self):
+        # gh-17068
+        with pytest.raises(TypeError, match=r"Unable to convert dtype.*"):
+            complex(np.array("now", np.datetime64))
+
+    def test__array_interface__descr(self):
+        # gh-17068
+        dt = np.dtype(dict(names=['a', 'b'],
+                           offsets=[0, 0],
+                           formats=[np.int64, np.int64]))
+        descr = np.array((1, 1), dtype=dt).__array_interface__['descr']
+        assert descr == [('', '|V8')]  # instead of [(b'', '|V8')]