Add tests for NativeAdBannerView load delegation

app/build.gradle

@@ -107,4 +107,5 @@ dependencies {
     testImplementation libs.androidx.core.testing
     testImplementation libs.mockito.core
     testImplementation libs.mockito.inline
+    testImplementation libs.robolectric
 }

app/src/test/java/com/d4rk/androidtutorials/java/ads/views/NativeAdBannerViewTest.java

@@ -0,0 +1,130 @@
+package com.d4rk.androidtutorials.java.ads.views;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isNull;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import com.d4rk.androidtutorials.java.R;
+import com.d4rk.androidtutorials.java.ads.managers.NativeAdLoader;
+import com.google.android.gms.ads.AdListener;
+import com.google.android.gms.ads.AdRequest;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.MockedStatic;
+import org.mockito.Mockito;
+import org.robolectric.Robolectric;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class NativeAdBannerViewTest {
+
+    private Context context;
+
+    @Before
+    public void setUp() {
+        context = RuntimeEnvironment.getApplication();
+    }
+
+    @Test
+    public void loadAd_withoutArguments_delegatesToNativeAdLoader() {
+        NativeAdBannerView view = new NativeAdBannerView(context);
+
+        try (MockedStatic<NativeAdLoader> loaderMock = Mockito.mockStatic(NativeAdLoader.class)) {
+            view.loadAd();
+
+            loaderMock.verify(() -> NativeAdLoader.load(
+                    eq(context),
+                    eq(view),
+                    eq(R.layout.ad_home_banner_large),
+                    any(AdRequest.class),
+                    isNull()
+            ));
+            loaderMock.verifyNoMoreInteractions();
+        }
+    }
+
+    @Test
+    public void loadAd_withListener_delegatesToNativeAdLoader() {
+        NativeAdBannerView view = new NativeAdBannerView(context);
+        AdListener listener = new AdListener() { };
+
+        try (MockedStatic<NativeAdLoader> loaderMock = Mockito.mockStatic(NativeAdLoader.class)) {
+            view.loadAd(listener);
+
+            loaderMock.verify(() -> NativeAdLoader.load(
+                    eq(context),
+                    eq(view),
+                    eq(R.layout.ad_home_banner_large),
+                    any(AdRequest.class),
+                    eq(listener)
+            ));
+            loaderMock.verifyNoMoreInteractions();
+        }
+    }
+
+    @Test
+    public void loadAd_withRequest_delegatesToNativeAdLoader() {
+        NativeAdBannerView view = new NativeAdBannerView(context);
+        AdRequest request = new AdRequest.Builder().build();
+
+        try (MockedStatic<NativeAdLoader> loaderMock = Mockito.mockStatic(NativeAdLoader.class)) {
+            view.loadAd(request);
+
+            loaderMock.verify(() -> NativeAdLoader.load(
+                    eq(context),
+                    eq(view),
+                    eq(R.layout.ad_home_banner_large),
+                    eq(request),
+                    isNull()
+            ));
+            loaderMock.verifyNoMoreInteractions();
+        }
+    }
+
+    @Test
+    public void loadAd_withRequestAndListener_delegatesToNativeAdLoader() {
+        NativeAdBannerView view = new NativeAdBannerView(context);
+        AdRequest request = new AdRequest.Builder().build();
+        AdListener listener = new AdListener() { };
+
+        try (MockedStatic<NativeAdLoader> loaderMock = Mockito.mockStatic(NativeAdLoader.class)) {
+            view.loadAd(request, listener);
+
+            loaderMock.verify(() -> NativeAdLoader.load(
+                    eq(context),
+                    eq(view),
+                    eq(R.layout.ad_home_banner_large),
+                    eq(request),
+                    eq(listener)
+            ));
+            loaderMock.verifyNoMoreInteractions();
+        }
+    }
+
+    @Test
+    public void constructor_withNativeAdLayoutAttribute_setsLayoutResource() {
+        AttributeSet attrs = Robolectric.buildAttributeSet()
+                .addAttribute(R.attr.nativeAdLayout, "@layout/ad_home_banner_small")
+                .build();
+        NativeAdBannerView view = new NativeAdBannerView(context, attrs);
+
+        try (MockedStatic<NativeAdLoader> loaderMock = Mockito.mockStatic(NativeAdLoader.class)) {
+            view.loadAd();
+
+            loaderMock.verify(() -> NativeAdLoader.load(
+                    eq(context),
+                    eq(view),
+                    eq(R.layout.ad_home_banner_small),
+                    any(AdRequest.class),
+                    isNull()
+            ));
+            loaderMock.verifyNoMoreInteractions();
+        }
+    }
+}

gradle/libs.versions.toml

@@ -30,6 +30,7 @@ hilt = "2.57.1"
 room = "2.8.0"
 glide = "5.0.4"
 retrofit = "3.0.0"
+robolectric = "4.12.2"
 
 [libraries]
 aboutlibraries = { module = "com.mikepenz:aboutlibraries", version.ref = "aboutlibraries" }
@@ -73,3 +74,4 @@ glide = { module = "com.github.bumptech.glide:glide", version.ref = "glide" }
 glide-compiler = { module = "com.github.bumptech.glide:compiler", version.ref = "glide" }
 retrofit2 = { module = "com.squareup.retrofit2:retrofit", version.ref = "retrofit" }
 retrofit2-converter-gson = { module = "com.squareup.retrofit2:converter-gson", version.ref = "retrofit" }
+robolectric = { module = "org.robolectric:robolectric", version.ref = "robolectric" }