TST: Add tests for the new `generic` constructors

1 files changed, 28 insertions, 3 deletions

diff --git a/numpy/tests/typing/pass/scalars.py b/numpy/tests/typing/pass/scalars.py
index 1c7ace282..027a4fa50 100644
--- a/numpy/tests/typing/pass/scalars.py
+++ b/numpy/tests/typing/pass/scalars.py
@@ -1,27 +1,37 @@
+import datetime as dt
 import numpy as np
 
 
 # Construction
+class D:
+    def __index__(self) -> int:
+        return 0
+
+
 class C:
-    def __complex__(self):
+    def __complex__(self) -> complex:
         return 3j
 
 
 class B:
-    def __int__(self):
+    def __int__(self) -> int:
         return 4
 
 
 class A:
-    def __float__(self):
+    def __float__(self) -> float:
         return 4.0
 
 
 np.complex64(3j)
+np.complex64(A())
 np.complex64(C())
 np.complex128(3j)
 np.complex128(C())
 np.complex128(None)
+np.complex64(D())
+np.complex64("1.2")
+np.complex128(b"2j")
 
 np.int8(4)
 np.int16(3.4)
@@ -29,11 +39,17 @@ np.int32(4)
 np.int64(-1)
 np.uint8(B())
 np.uint32()
+np.uint64(D())
+np.int32("1")
+np.int64(b"2")
 
 np.float16(A())
 np.float32(16)
 np.float64(3.0)
 np.float64(None)
+np.float32("1")
+np.float16(b"2.5")
+np.float32(D())
 
 np.bytes_(b"hello")
 np.bytes_("hello", 'utf-8')
@@ -66,14 +82,23 @@ np.uint64().shape
 # Time structures
 np.datetime64()
 np.datetime64(0, "D")
+np.datetime64(0, b"D")
 np.datetime64("2019")
+np.datetime64(b"2019")
 np.datetime64("2019", "D")
+np.datetime64(np.datetime64())
+np.datetime64(dt.datetime(2000, 5, 3))
 np.datetime64(None)
 np.datetime64(None, "D")
 
 np.timedelta64()
 np.timedelta64(0)
 np.timedelta64(0, "D")
+np.timedelta64(0, b"D")
+np.timedelta64("3")
+np.timedelta64(b"5")
+np.timedelta64(np.timedelta64(2))
+np.timedelta64(dt.timedelta(2))
 np.timedelta64(None)
 np.timedelta64(None, "D")