[NFC] Don't run conformance tests on mock adapter

Closes: #2215

Author: RossBrunton

CMakeLists.txt

@@ -225,6 +225,14 @@ if(UR_USE_MSAN)
     add_sanitizer_flag(memory)
 endif()
 
+if(NOT (UR_BUILD_ADAPTER_CUDA OR UR_BUILD_ADAPTER_HIP
+    OR UR_BUILD_ADAPTER_L0 OR UR_BUILD_ADAPTER_OPENCL
+    OR UR_BUILD_ADAPTER_NATIVE_CPU OR UR_BUILD_ADAPTER_L0_V2
+    OR UR_BUILD_ADAPTER_ALL))
+    message(WARNING "No adapters have been enabled; conformance tests will not be ran")
+    message(STATUS "Consider setting UR_BUILD_ADAPTER_*")
+endif()
+
 # Check if clang-format (in correct version) is available for Cpp code formatting.
 if(UR_FORMAT_CPP_STYLE)
     find_program(CLANG_FORMAT NAMES clang-format-15 clang-format-15.0 clang-format)

test/conformance/CMakeLists.txt

@@ -86,13 +86,6 @@ function(add_conformance_test name)
     if(UR_BUILD_ADAPTER_NATIVE_CPU OR UR_BUILD_ADAPTER_ALL)
         add_test_adapter(${name} adapter_native_cpu NATIVE_CPU)
     endif()
-
-    if(NOT (UR_BUILD_ADAPTER_CUDA OR UR_BUILD_ADAPTER_HIP
-            OR UR_BUILD_ADAPTER_L0 OR UR_BUILD_ADAPTER_OPENCL
-            OR UR_BUILD_ADAPTER_NATIVE_CPU OR UR_BUILD_ADAPTER_L0_V2
-            OR UR_BUILD_ADAPTER_ALL))
-        add_test_adapter(${name} adapter_mock MOCK)
-    endif()
 endfunction()
 
 function(add_conformance_test_with_kernels_environment name)

test/conformance/source/environment.cpp

@@ -34,7 +34,6 @@ constexpr std::pair<const char *, ur_platform_backend_t> backends[] = {
     {"HIP", UR_PLATFORM_BACKEND_HIP},
     {"NATIVE_CPU", UR_PLATFORM_BACKEND_NATIVE_CPU},
     {"UNKNOWN", UR_PLATFORM_BACKEND_UNKNOWN},
-    {"MOCK", UR_PLATFORM_BACKEND_UNKNOWN},
 };
 
 namespace {