Enabling clang-cl in test matrix for real

Author: gershnik

.github/workflows/test.yml

@@ -144,12 +144,26 @@ jobs:
           # echo "ICU_ROOT=$GITHUB_WORKSPACE/icu_root" >> $GITHUB_ENV
           # echo "LD_LIBRARY_PATH=$GITHUB_WORKSPACE/icu_root/lib" >> $GITHUB_ENV
         fi
+
         if [[ '${{ matrix.os }}' == macos-* ]]; then
           brew install icu4c
           echo "DEVELOPER_DIR=/Applications/Xcode_${{ matrix.version }}.app" >> $GITHUB_ENV
           echo "ICU_ROOT=$(brew --cellar icu4c)/$(brew info --json icu4c | jq -r '.[0].installed[0].version')" >> $GITHUB_ENV
         fi
 
+        if [[ '${{ matrix.os }}' == windows-* ]]; then
+            if [[ '${{ matrix.compiler }}' != '' ]]; then
+                if [[ '${{ matrix.arch }}' == "x64" ]]; then
+                    VCPREFIX="C:\\Program Files\\Microsoft Visual Studio\\2022\\Enterprise\\VC\\Tools\\Llvm\\x64\\bin"
+                else
+                    VCPREFIX="C:\\Program Files\\Microsoft Visual Studio\\2022\\Enterprise\\VC\\Tools\\Llvm\\bin"
+                fi
+                echo "CC=$VCPREFIX\\${{ matrix.compiler }}" >> $GITHUB_ENV
+                echo "CXX=$VCPREFIX\\${{ matrix.compiler }}" >> $GITHUB_ENV
+                echo "CMAKE_GENERATOR=Ninja" >> $GITHUB_ENV
+            fi
+        fi
+
         CMAKE_ARGS=( )
 
         if [[ '${{ matrix.platform }}' != "" ]]; then