add new workflow to test dart

Author: wing328

.github/workflows/samples-dart-build-test.yaml

@@ -0,0 +1,38 @@
+name: Samples Dart (build, test)
+
+on:
+  push:
+    branches:
+    paths:
+      - samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake-json_serializable/**
+  pull_request:
+    paths:
+      - samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake-json_serializable/**
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      sample:
+          - samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake-json_serializable/
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        sdk: ["3.1", "2.25.0"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dart-lang/setup-dart@v1
+        working-directory: ${{ matrix.sample }}
+        with:
+          sdk: ${{ matrix.sdk }}
+
+      - name: pub get
+        working-directory: ${{ matrix.sample }}
+        run: dart pub get
+
+      - name: build_runner build
+        working-directory: ${{ matrix.sample }}
+        run: dart run build_runner build
+
+      - name: test
+        working-directory: ${{ matrix.sample }}
+        run: dart test

samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake-json_serializable/.openapi-generator-ignore

@@ -21,3 +21,4 @@
 #docs/*.md
 # Then explicitly reverse the ignore rule for a single file:
 #!docs/README.md
+#