ci add mini tests

.circleci/config.yml

@@ -1,15 +1,38 @@
 version: 2
 jobs:
+  test:
+    docker:
+      - image: registry.gitlab.com/fdroid/ci-images-client:latest
+    steps:
+      - checkout
+      - restore_cache:
+          key: gradle
+      - run: export GRADLE_USER_HOME=$PWD/.gradle
+      - run: echo y | sdkmanager "platforms;android-$(sed -n 's,.*compileSdkVersion\s*\([0-9][0-9]*\).*,\1,p' build.gradle)" > /dev/null
+      - run: ./gradlew lint
+      - save_cache:
+          paths:
+            - .gradle/caches
+            - .gradle/wrapper
+          key: gradle
+      - store_artifacts:
+          path: build/outputs/apk/standard
+          destination: apk
   build:
     docker:
       - image: registry.gitlab.com/fdroid/ci-images-client:latest
     steps:
       - checkout
       - restore_cache:
-          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
+          key: gradle
       - run: export GRADLE_USER_HOME=$PWD/.gradle
       - run: echo y | sdkmanager "platforms;android-$(sed -n 's,.*compileSdkVersion\s*\([0-9][0-9]*\).*,\1,p' build.gradle)" > /dev/null
       - run: ./gradlew assembleStandard
+      - save_cache:
+          paths:
+            - .gradle/caches
+            - .gradle/wrapper
+          key: gradle
       - store_artifacts:
           path: build/outputs/apk/standard
           destination: apk
@@ -19,3 +42,4 @@ workflows:
   build_only:
     jobs:
     - build
+    - test

.gitlab-ci.yml

@@ -7,6 +7,7 @@ cache:
 
 stages:
   - build
+  - test
 
 before_script:
   - export GRADLE_USER_HOME=$PWD/.gradle
@@ -22,6 +23,14 @@ build:
     paths:
     - build/outputs/
 
+build:
+  stage: test
+  script:
+  - ./gradlew lint
+  artifacts:
+    paths:
+    - build/outputs/
+
 after_script:
   # this file changes every time but should not be cached
   - rm -f $GRADLE_USER_HOME/caches/modules-2/modules-2.lock