Added SyclContextCreationError

Used it in SyclContext constructor.
Modified tests.

Author: oleksandr-pavlyk

dpctl/__init__.py

@@ -32,7 +32,7 @@
 """
 __author__ = "Intel Corp."
 
-from dpctl._sycl_context import SyclContext
+from dpctl._sycl_context import SyclContext, SyclContextCreationError
 from dpctl._sycl_device import (
     SyclDevice,
     SyclDeviceCreationError,
@@ -77,6 +77,7 @@
 
 __all__ = [
     "SyclContext",
+    "SyclContextCreationError",
 ]
 __all__ += [
     "SyclDevice",

dpctl/_sycl_context.pyx

@@ -49,13 +49,25 @@ from ._backend cimport (  # noqa: E211
 )
 from ._sycl_device cimport SyclDevice
 from ._sycl_queue cimport default_async_error_handler
+from ._sycl_device import SyclDeviceCreationError
 
 __all__ = [
     "SyclContext",
+    "SyclContextCreationError",
 ]
 
 _logger = logging.getLogger(__name__)
 
+
+cdef class SyclContextCreationError(Exception):
+    """
+    A SyclContextCreationError exception is raised when
+    SyclContext could not created.
+
+    """
+    pass
+
+
 cdef void _context_capsule_deleter(object o):
     cdef DPCTLSyclContextRef CRef = NULL
     if pycapsule.PyCapsule_IsValid(o, "SyclContextRef"):
@@ -283,11 +295,17 @@ cdef class SyclContext(_SyclContext):
         ):
             ret = self._init_context_from_devices(arg, 0)
         else:
-            dev = SyclDevice(arg)
+            try:
+                dev = SyclDevice(arg)
+            except SyclDeviceCreationError as e:
+                raise SyclContextCreationError(
+                    "SyclContext failed to be created because "
+                    f"SyclDevice could not be created from the argument {arg}"
+                ) from e
             ret = self._init_context_from_one_device(<SyclDevice> dev, 0)
         if (ret < 0):
             if (ret == -1):
-                raise ValueError("Context failed to be created.")
+                raise SyclContextCreationError("Context failed to be created.")
             elif (ret == -2):
                 raise TypeError(
                     "List of devices to create context from must be non-empty."

dpctl/_sycl_device.pyx

@@ -101,16 +101,16 @@ __all__ = [
 
 cdef class SyclDeviceCreationError(Exception):
     """
-    A DeviceCreationError exception is raised when
-    device could not created.
+    A SyclDeviceCreationError exception is raised when
+    SyclDevice instance could not created.
 
     """
     pass
 
 
 cdef class SyclSubDeviceCreationError(Exception):
     """
-    A SubDeviceCreationError exception is raised when
+    A SyclSubDeviceCreationError exception is raised when
     sub-devices were not created.
 
     """

dpctl/tests/test_sycl_context.py

@@ -50,7 +50,7 @@ def test_ctxt_creation_from_filter(valid_filter):
     """
     try:
         dpctl.SyclContext(valid_filter)
-    except ValueError:
+    except dpctl.SyclContextCreationError:
         pytest.skip("Failed to create context with supported filter")
 
 
@@ -70,11 +70,11 @@ def test_context_not_equals():
     """
     try:
         ctx_gpu = dpctl.SyclContext("gpu")
-    except ValueError:
+    except dpctl.SyclContextCreationError:
         pytest.skip()
     try:
         ctx_cpu = dpctl.SyclContext("cpu")
-    except ValueError:
+    except dpctl.SyclContextCreationError:
         pytest.skip()
     assert ctx_cpu != ctx_gpu
     assert hash(ctx_cpu) != hash(ctx_gpu)
@@ -93,7 +93,7 @@ def test_context_equals():
     try:
         ctx1 = dpctl.SyclContext("gpu")
         ctx0 = dpctl.SyclContext("gpu")
-    except ValueError:
+    except dpctl.SyclContextCreationError:
         pytest.skip()
     assert ctx0 == ctx1
     assert hash(ctx0) == hash(ctx1)
@@ -118,7 +118,7 @@ def test_repr():
 def test_context_can_be_used_in_queue(valid_filter):
     try:
         ctx = dpctl.SyclContext(valid_filter)
-    except ValueError:
+    except dpctl.SyclContextCreationError:
         pytest.skip()
     devs = ctx.get_devices()
     assert len(devs) == ctx.device_count
@@ -129,7 +129,7 @@ def test_context_can_be_used_in_queue(valid_filter):
 def test_context_can_be_used_in_queue2(valid_filter):
     try:
         d = dpctl.SyclDevice(valid_filter)
-    except ValueError:
+    except dpctl.SyclContextCreationError:
         pytest.skip()
     if d.default_selector_score < 0:
         # skip test for devices rejected by default selector
@@ -141,7 +141,7 @@ def test_context_can_be_used_in_queue2(valid_filter):
 def test_context_multi_device():
     try:
         d = dpctl.SyclDevice("cpu")
-    except ValueError:
+    except dpctl.SyclContextCreationError:
         pytest.skip()
     if d.default_selector_score < 0:
         pytest.skip()
@@ -244,5 +244,5 @@ def test_invalid_capsule():
 def test_multi_device_different_platforms():
     devs = dpctl.get_devices()  # all devices
     if len(devs) > 1:
-        with pytest.raises(ValueError):
+        with pytest.raises(dpctl.SyclContextCreationError):
             dpctl.SyclContext(devs)