actions: Add unittests for macos

.github/workflows/macos.yml

@@ -0,0 +1,35 @@
+name: macos
+
+on:
+  push:
+    paths:
+      - "mesonbuild/**"
+      - "test cases/**"
+      - ".github/workflows/macos.yml"
+  pull_request:
+    paths:
+      - "mesonbuild/**"
+      - "test cases/**"
+      - ".github/workflows/macos.yml"
+
+jobs:
+  unittests-appleclang:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - run: |
+        python -m pip install --upgrade pip
+        python -m pip install pytest pytest-xdist jsonschema
+    - run: brew install pkg-config ninja llvm qt
+    - env:
+        CPPFLAGS: "-I/usr/local/include"
+        LDFLAGS: "-L/usr/local/lib"
+        MESON_UNIT_TEST_BACKEND: ninja
+        # These cannot evaluate anything, so we cannot set PATH or SDKROOT here
+      run: |
+        export SDKROOT="$(xcodebuild -version -sdk macosx Path)"
+        export PATH="$HOME/tools:/usr/local/opt/qt/bin:$PATH:$(brew --prefix llvm)/bin"
+        ./run_unittests.py

run_unittests.py

@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from mesonbuild.compilers.objc import AppleClangObjCCompiler
 import time
 import stat
 import subprocess