Skip test if oneAPI Base Toolkit isn't available

As the library aren't included in .bc format in version 2025.2 and
earlier, we need to skip the test if no oneAPI Base Toolkit is
installed.

Signed-off-by: Lukas Sommer <lukas.sommer@codeplay.com>

Author: sommerlukas

dpctl/tests/test_sycl_program.py

@@ -17,6 +17,7 @@
 """Defines unit test cases for the SyclProgram and SyclKernel classes"""
 
 import os
+import shutil
 
 import pytest
 
@@ -271,6 +272,12 @@ def test_create_program_from_sycl_source():
     except dpctl.SyclQueueCreationError:
         pytest.skip("No OpenCL queue is available")
 
+    if not shutil.which("icpx"):
+        # In version 2025.2 and before, the packages do not contain the
+        # libraries in the .bc format necessary for RTC. Therefore,
+        # installation of the base toolkit is required.
+        pytest.skip("oneAPI Base Toolkit not installed")
+
     if not q.get_sycl_device().can_compile("sycl"):
         pytest.skip("SYCL source compilation not supported")
 
@@ -381,6 +388,12 @@ def test_create_program_from_invalid_src_sycl():
     except dpctl.SyclQueueCreationError:
         pytest.skip("No OpenCL queue is available")
 
+    if not shutil.which("icpx"):
+        # In version 2025.2 and before, the packages do not contain the
+        # libraries in the .bc format necessary for RTC. Therefore,
+        # installation of the base toolkit is required.
+        pytest.skip("oneAPI Base Toolkit not installed")
+
     if not q.get_sycl_device().can_compile("sycl"):
         pytest.skip("SYCL source compilation not supported")