Add sync service tests (#80)

Author: phpbg

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: set up JDK 17
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           java-version: '17'
           distribution: 'temurin'
@@ -24,14 +24,14 @@ jobs:
         run: ./gradlew testFreeVersionDebugUnitTest jacocoTestReport --continue
 
       - name: Upload Coverage Report
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: coverage-report
           path: app/build/reports/jacoco/jacocoTestReport/html/
 
       - name: Upload Test Results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: test-results

app/build.gradle

@@ -95,6 +95,9 @@ dependencies {
     implementation 'org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0'
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'net.sf.kxml:kxml2:2.3.0'
+    testImplementation 'org.mockito:mockito-core:5.15.2'
+    testImplementation 'org.mockito.kotlin:mockito-kotlin:5.4.0'
+    testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.10.1'
     androidTestImplementation 'androidx.test.ext:junit:1.3.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.7.0'
     androidTestImplementation platform('androidx.compose:compose-bom:2025.12.00')