add github workflow

.github/workflows/dart.yml

@@ -0,0 +1,59 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Dart
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - uses: actions/checkout@v3
+
+      # Note: This workflow uses the latest stable version of the Dart SDK.
+      # You can specify other versions if desired, see documentation here:
+      # https://github.com/dart-lang/setup-dart/blob/main/README.md
+      # - uses: dart-lang/setup-dart@v1
+      - uses: dart-lang/setup-dart@9a04e6d73cca37bd455e0608d7e5092f881fd603
+
+      - name: Install dependencies
+        run: dart pub get
+
+      # Uncomment this step to verify the use of 'dart format' on each commit.
+      # - name: Verify formatting
+      #   run: dart format --output=none --set-exit-if-changed .
+
+      # Consider passing '--fatal-infos' for slightly stricter analysis.
+      - name: Analyze project source
+        run: dart analyze
+
+      # pre-pull the image so `usePostgresDocker` does not delay which may causes 
+      # tests to timeout
+      - name: pull latest postgres image
+        run: docker pull postgres:latest
+
+      - name: Generate test files
+        run: dart run test/data/generate_data.dart
+
+      # Saves coverage information in the "coverage" folder.
+      - name: Run tests
+        run: dart -Dfrom_script=true test --coverage=coverage
+
+      # https://www.bradcypert.com/how-to-upload-coverage-to-codecov-for-dart/
+      - name: Install coverage tools
+        run: dart pub global activate coverage
+
+      - name: format coverage
+        run: $HOME/.pub-cache/bin/format_coverage --lcov --in=coverage --out=coverage.lcov --report-on=lib
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v3