Fix typing in array object. Add tests

Author: roaffix

arrayfire/array_api/_array_object.py

@@ -39,16 +39,17 @@ class Array:
     __array_priority__ = 30
 
     def __init__(
-            self, x: None | Array | py_array.array | int | ctypes.c_void_p | list = None, dtype: None | Dtype = None,
-            pointer_source: PointerSource = PointerSource.host, shape: None | ShapeType = None,
-            offset: None | ctypes._SimpleCData[int] = None, strides: None | ShapeType = None) -> None:
+            self, x: None | Array | py_array.array | int | ctypes.c_void_p | list = None,
+            dtype: None | Dtype | str = None, shape: None | ShapeType = None,
+            pointer_source: PointerSource = PointerSource.host, offset: None | ctypes._SimpleCData[int] = None,
+            strides: None | ShapeType = None) -> None:
         _no_initial_dtype = False  # HACK, FIXME
 
         # Initialise array object
         self.arr = ctypes.c_void_p(0)
 
         if isinstance(dtype, str):
-            dtype = _str_to_dtype(dtype)
+            dtype = _str_to_dtype(dtype)  # type: ignore[arg-type]
 
         if dtype is None:
             _no_initial_dtype = True

arrayfire/array_api/tests/test_array_object.py

@@ -1,12 +1,15 @@
+import array as pyarray
+
 import pytest
 
 from arrayfire.array_api import Array, float32, int16
 from arrayfire.array_api._dtypes import supported_dtypes
 
 # TODO change separated methods with setup and teardown to avoid code duplication
+# TODO add tests for array arguments: device, offset, strides
 
 
-def test_empty_array() -> None:
+def test_create_empty_array() -> None:
     array = Array()
 
     assert array.dtype == float32
@@ -16,7 +19,7 @@ def test_empty_array() -> None:
     assert len(array) == 0
 
 
-def test_empty_array_with_nonempty_dtype() -> None:
+def test_create_empty_array_with_nonempty_dtype() -> None:
     array = Array(dtype=int16)
 
     assert array.dtype == int16
@@ -26,7 +29,32 @@ def test_empty_array_with_nonempty_dtype() -> None:
     assert len(array) == 0
 
 
-def test_empty_array_with_nonempty_shape() -> None:
+def test_create_empty_array_with_str_dtype() -> None:
+    array = Array(dtype="short int")
+
+    assert array.dtype == int16
+    assert array.ndim == 0
+    assert array.size == 0
+    assert array.shape == ()
+    assert len(array) == 0
+
+
+def test_create_empty_array_with_literal_dtype() -> None:
+    array = Array(dtype="h")
+
+    assert array.dtype == int16
+    assert array.ndim == 0
+    assert array.size == 0
+    assert array.shape == ()
+    assert len(array) == 0
+
+
+def test_create_empty_array_with_not_matching_str_dtype() -> None:
+    with pytest.raises(TypeError):
+        Array(dtype="hello world")
+
+
+def test_create_empty_array_with_nonempty_shape() -> None:
     array = Array(shape=(2, 3))
 
     assert array.dtype == float32
@@ -36,7 +64,7 @@ def test_empty_array_with_nonempty_shape() -> None:
     assert len(array) == 2
 
 
-def test_array_from_1d_list() -> None:
+def test_create_array_from_1d_list() -> None:
     array = Array([1, 2, 3])
 
     assert array.dtype == float32
@@ -46,11 +74,22 @@ def test_array_from_1d_list() -> None:
     assert len(array) == 3
 
 
-def test_array_from_2d_list() -> None:
+def test_create_array_from_2d_list() -> None:
     with pytest.raises(TypeError):
         Array([[1, 2, 3], [1, 2, 3]])
 
 
+def test_create_array_from_pyarray() -> None:
+    py_array = pyarray.array("f", [1, 2, 3])
+    array = Array(py_array)
+
+    assert array.dtype == float32
+    assert array.ndim == 1
+    assert array.size == 3
+    assert array.shape == (3,)
+    assert len(array) == 3
+
+
 def test_array_from_list_with_unsupported_dtype() -> None:
     for dtype in supported_dtypes:
         if dtype == float32: