Add tests for pop.

Include/internal/pycore_dynarray.h

@@ -211,9 +211,9 @@ _PyDynArray_LENGTH(_PyDynArray *array)
  * This function cannot fail.
  */
 static inline void *
-_PyDynArray_PopTop(_PyDynArray *array, Py_ssize_t index)
+_PyDynArray_PopTop(_PyDynArray *array)
 {
-    return _PyDynArray_PopTop(array, _PyDynArray_LENGTH(array) - 1);
+    return _PyDynArray_Pop(array, _PyDynArray_LENGTH(array) - 1);
 }
 
 #ifdef __cplusplus

Modules/_testinternalcapi.c

@@ -2075,6 +2075,10 @@ test_dynarray_common(_PyDynArray *array)
         APPEND(NULL);
     }
 
+    assert(_PyDynArray_PopTop(array) == NULL);
+    APPEND((void *) 42);
+    assert(_PyDynArray_PopTop(array) == (void *) 42);
+
 #undef APPEND
 
     // Make sure that nothing got corrupted
@@ -2089,6 +2093,7 @@ test_dynarray_common(_PyDynArray *array)
     Py_ssize_t index = _PyDynArray_DEFAULT_SIZE;
     _PyDynArray_Set(array, index, (void *) 1);
     assert(_PyDynArray_GET_ITEM(array, index) == (void *) 1);
+    assert(_PyDynArray_Pop(array, 0) == Py_True);
     return 0;
 }