Add unit tests for startup initialization

Author: MihaiCristianCondrea

app/src/test/java/com/d4rk/androidtutorials/java/startup/StartupInitializerTest.java

@@ -0,0 +1,37 @@
+package com.d4rk.androidtutorials.java.startup;
+
+import android.content.Context;
+
+import androidx.work.ExistingWorkPolicy;
+import androidx.work.OneTimeWorkRequest;
+import androidx.work.WorkManager;
+
+import org.junit.Test;
+import org.mockito.MockedStatic;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.mockStatic;
+import static org.mockito.Mockito.verify;
+
+public class StartupInitializerTest {
+
+    @Test
+    public void schedule_enqueuesWorkWithKeepPolicy() {
+        Context context = mock(Context.class);
+        WorkManager workManager = mock(WorkManager.class);
+
+        try (MockedStatic<WorkManager> mockedWorkManager = mockStatic(WorkManager.class)) {
+            mockedWorkManager.when(() -> WorkManager.getInstance(context)).thenReturn(workManager);
+
+            StartupInitializer.schedule(context);
+
+            verify(workManager).enqueueUniqueWork(
+                    eq("startup_init"),
+                    eq(ExistingWorkPolicy.KEEP),
+                    any(OneTimeWorkRequest.class)
+            );
+        }
+    }
+}

app/src/test/java/com/d4rk/androidtutorials/java/startup/StartupWorkerTest.java

@@ -0,0 +1,39 @@
+package com.d4rk.androidtutorials.java.startup;
+
+import android.content.Context;
+import android.webkit.CookieManager;
+
+import androidx.work.ListenableWorker;
+import androidx.work.WorkerParameters;
+
+import com.d4rk.androidtutorials.java.ads.AdUtils;
+
+import org.junit.Test;
+import org.mockito.MockedStatic;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.mockStatic;
+import static org.mockito.Mockito.when;
+
+public class StartupWorkerTest {
+
+    @Test
+    public void doWork_initializesAdsAndCookiesAndReturnsSuccess() {
+        Context context = mock(Context.class);
+        when(context.getApplicationContext()).thenReturn(context);
+        WorkerParameters parameters = mock(WorkerParameters.class);
+        StartupWorker worker = new StartupWorker(context, parameters);
+
+        try (MockedStatic<AdUtils> mockedAdUtils = mockStatic(AdUtils.class);
+             MockedStatic<CookieManager> mockedCookieManager = mockStatic(CookieManager.class)) {
+            mockedCookieManager.when(CookieManager::getInstance).thenReturn(mock(CookieManager.class));
+
+            ListenableWorker.Result result = worker.doWork();
+
+            mockedAdUtils.verify(() -> AdUtils.initialize(context));
+            mockedCookieManager.verify(CookieManager::getInstance);
+            assertEquals(ListenableWorker.Result.success(), result);
+        }
+    }
+}