add unit test setup for cubit tests

.github/workflows/build.yml

@@ -26,6 +26,9 @@ jobs:
     #  FLUTTER_VERSION: "2.5.3"
     steps:
       - uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v22
+        with:
+          nix_path: nixpkgs=channel:nixos-23.11
       #- uses: actions/setup-java@v1
       #  with:
       #    java-version: $
@@ -40,6 +43,8 @@ jobs:
       - run: ./submodules/flutter/bin/flutter pub get
       - run: ./submodules/flutter/bin/dart format --output=none --set-exit-if-changed ./lib
       - run: ./submodules/flutter/bin/dart analyze ./lib
+      - name: Run tests with nix (starts postgres and invidious server)
+        run: nix-shell --run './submodules/flutter/bin/flutter test'
       - run: ./submodules/flutter/bin/flutter pub run flutter_native_splash:create
       - run: ./submodules/flutter/bin/flutter build apk --profile --split-per-abi
       - name: Archive build artifacts

.gitignore

@@ -43,3 +43,5 @@ app.*.map.json
 /android/app/profile
 /android/app/release
 /docker/result
+/.nix-shell/
+/nix/result/

README.md

@@ -102,10 +102,33 @@ git submodule update
 #enable git pre commit hooks for auto formatting
 ./submodules/flutter/bin/dart run tools/setup_git_hooks.dart
 ```
+or using nix that will handle all the above plus starting a working invidious instance with user test and password test.
+```
+nix-shell
+```
 Flutter itself is used as a submodule of this repo in order to pin the version I want to use to enable reproducible build on f-droid
 
 You'll need to also set up your android SDK and a device / emulator to run the app on.
 
+#### Tests
+
+The app has some tests and they expect to have a locally running invidious server, with a test user (password test).
+
+The easy way it to use [nix](https://nixos.org) and run 
+
+```
+nix-shell
+```
+
+That will spin a postgres DB, an invidious server and the required user (this is how the tests are run in the ci/cd).
+
+Nothing keeps you to run your own user docker or other ways.
+
+Alternatively, you can directly run the tests with its environment:
+```
+nix-shell --run './submodules/flutter/bin/flutter test'
+```
+
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