CI: add basic Meson testing

I've tried to be a bit more minimal here than the CMake tests are, since
there's already a good cross section of testing there. For Meson, I just
want to touch test each of the major platforms to ensure that it works

.github/workflows/meson.yml

@@ -0,0 +1,46 @@
+name: Meson
+
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+  workflow_dispatch:
+
+jobs:
+  build-ubuntu:
+    name: Build and Test on Ubuntu
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v5
+      - uses: BSFishy/[email protected]
+        with:
+          action: test
+          meson-version: 0.64.1
+
+  build-macos:
+    name: Build and Test on MacOS
+    runs-on: macos-12
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v5
+      - uses: BSFishy/[email protected]
+        with:
+          action: test
+          meson-version: 0.64.1
+
+  build-windows:
+    name: Build and Test on Windows
+    runs-on: windows-latest
+    env:
+      CXX: clang-cl
+    steps:
+      - uses: ilammy/msvc-dev-cmd@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v5
+      - uses: BSFishy/[email protected]
+        with:
+          action: test
+          setup-options: -Dcpp_std=c++14  # Clang-CL doesn't actually support C++11, hide the warning
+          meson-version: 0.64.1

meson.build

@@ -69,20 +69,7 @@ endif
 
 with_tests = get_option('tests').disable_auto_if(meson.is_subproject()).allowed()
 if with_tests
-  test(
-    'link',
-    executable(
-      'link_test',
-      'test/link_a.cpp', 'test/link_b.cpp',
-      dependencies : dep_icu,
-      include_directories : 'include',
-    )
-  )
-
-  # Fuzzer test is not as trivial as it should be
-
-  # Meson can generate basic cmake-configs files, but not when targets are used,
-  # so these tests don't make sense
+  subdir('test')
 endif
 
 extra_cflags = []

test/meson.build

@@ -0,0 +1,55 @@
+# Copyright © 2024 Dylan Baker
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+inc = include_directories('../include')
+
+test(
+  'link',
+  executable(
+    'link_test',
+    'link_a.cpp', 'link_b.cpp',
+    dependencies : dep_icu,
+    include_directories : inc,
+  )
+)
+
+test(
+  'options',
+  executable(
+    'options_test',
+    'main.cpp', 'options.cpp',
+    dependencies : dep_icu,
+    include_directories : inc,
+  )
+)
+
+if cpp.get_id() == 'clang' and host_machine.system() == 'linux'
+  executable(
+    'fuzzer',
+    'fuzz.cpp',
+    cpp_args : ['-fsanitize=fuzzer'],
+    link_args : ['-fsanitize=fuzzer'],
+    dependencies : dep_icu,
+    include_directories : inc,
+  )
+endif
+
+# Meson can generate basic cmake-configs files, but not when targets are used,
+# so these tests don't make sense