From 412692afd22811c80ed69838f5e7fe8abac431a8 Mon Sep 17 00:00:00 2001
From: Nikita Grigorian <nikita.grigorian@intel.com>
Date: Wed, 8 Nov 2023 01:28:56 -0800
Subject: [PATCH] Adds tests for array API inspection

---
 .../tests/test_tensor_array_api_inspection.py | 163 ++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 dpctl/tests/test_tensor_array_api_inspection.py

diff --git a/dpctl/tests/test_tensor_array_api_inspection.py b/dpctl/tests/test_tensor_array_api_inspection.py
new file mode 100644
index 0000000000..5ae0d35f8e
--- /dev/null
+++ b/dpctl/tests/test_tensor_array_api_inspection.py
@@ -0,0 +1,163 @@
+#                      Data Parallel Control (dpctl)
+#
+# Copyright 2020-2023 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import pytest
+
+import dpctl
+import dpctl.tensor as dpt
+from dpctl.tensor._tensor_impl import (
+    default_device_complex_type,
+    default_device_fp_type,
+    default_device_index_type,
+    default_device_int_type,
+)
+
+_dtypes_no_fp16_fp64 = {
+    "bool": dpt.bool,
+    "float32": dpt.float32,
+    "complex64": dpt.complex64,
+    "complex128": dpt.complex128,
+    "int8": dpt.int8,
+    "int16": dpt.int16,
+    "int32": dpt.int32,
+    "int64": dpt.int64,
+    "uint8": dpt.uint8,
+    "uint16": dpt.uint16,
+    "uint32": dpt.uint32,
+    "uint64": dpt.uint64,
+}
+
+
+class MockDevice:
+    def __init__(self, fp16: bool, fp64: bool):
+        self.has_aspect_fp16 = fp16
+        self.has_aspect_fp64 = fp64
+
+
+def test_array_api_inspection_methods():
+    info = dpt.__array_namespace_info__()
+    assert info.capabilities()
+    assert info.default_device()
+    assert info.default_dtypes()
+    assert info.devices()
+    assert info.dtypes()
+
+
+def test_array_api_inspection_default_device():
+    assert (
+        dpt.__array_namespace_info__().default_device()
+        == dpctl.select_default_device()
+    )
+
+
+def test_array_api_inspection_devices():
+    devices1 = dpt.__array_namespace_info__().devices()
+    devices2 = dpctl.get_devices()
+    assert len(devices1) == len(devices2)
+    assert devices1 == devices2
+
+
+def test_array_api_inspection_capabilities():
+    capabilities = dpt.__array_namespace_info__().capabilities()
+    assert capabilities["boolean_indexing"]
+    assert capabilities["data_dependent_shapes"]
+
+
+def test_array_api_inspection_default_dtypes():
+    dev = dpctl.select_default_device()
+
+    int_dt = default_device_int_type(dev)
+    ind_dt = default_device_index_type(dev)
+    fp_dt = default_device_fp_type(dev)
+    cm_dt = default_device_complex_type(dev)
+
+    info = dpt.__array_namespace_info__()
+    default_dts_nodev = info.default_dtypes()
+    default_dts_dev = info.default_dtypes(dev)
+
+    assert (
+        int_dt == default_dts_nodev["integral"] == default_dts_dev["integral"]
+    )
+    assert (
+        ind_dt == default_dts_nodev["indexing"] == default_dts_dev["indexing"]
+    )
+    assert (
+        fp_dt
+        == default_dts_nodev["real floating"]
+        == default_dts_dev["real floating"]
+    )
+    assert (
+        cm_dt
+        == default_dts_nodev["complex floating"]
+        == default_dts_dev["complex floating"]
+    )
+
+
+def test_array_api_inspection_default_device_dtypes():
+    dev = dpctl.select_default_device()
+    dtypes = _dtypes_no_fp16_fp64.copy()
+    if dev.has_aspect_fp64:
+        dtypes["float64"] = dpt.float64
+
+    assert dtypes == dpt.__array_namespace_info__().dtypes()
+
+
+@pytest.mark.parametrize("fp16", [True, False])
+@pytest.mark.parametrize("fp64", [True, False])
+def test_array_api_inspection_device_dtypes(fp16, fp64):
+    dev = MockDevice(fp16, fp64)
+    dtypes = _dtypes_no_fp16_fp64.copy()
+    if fp64:
+        dtypes["float64"] = dpt.float64
+
+    assert dtypes == dpt.__array_namespace_info__().dtypes(device=dev)
+
+
+def test_array_api_inspection_dtype_kind():
+    info = dpt.__array_namespace_info__()
+
+    f_dtypes = info.dtypes(kind="real floating")
+    assert all([_dt[1].kind == "f" for _dt in f_dtypes.items()])
+
+    i_dtypes = info.dtypes(kind="signed integer")
+    assert all([_dt[1].kind == "i" for _dt in i_dtypes.items()])
+
+    u_dtypes = info.dtypes(kind="unsigned integer")
+    assert all([_dt[1].kind == "u" for _dt in u_dtypes.items()])
+
+    ui_dtypes = info.dtypes(kind="unsigned integer")
+    assert all([_dt[1].kind in "ui" for _dt in ui_dtypes.items()])
+
+    c_dtypes = info.dtypes(kind="complex floating")
+    assert all([_dt[1].kind == "c" for _dt in c_dtypes.items()])
+
+    assert info.dtypes(kind="bool") == {"bool": dpt.bool}
+
+    _signed_ints = {
+        "int8": dpt.int8,
+        "int16": dpt.int16,
+        "int32": dpt.int32,
+        "int64": dpt.int64,
+    }
+    assert (
+        info.dtypes(kind=("signed integer", "signed integer")) == _signed_ints
+    )
+    assert (
+        info.dtypes(
+            kind=("integral", "bool", "real floating", "complex floating")
+        )
+        == info.dtypes()
+    )