diff --git a/app/src/main/androidTest/java/CountryFragmentTest.kt b/app/src/main/androidTest/java/CountryFragmentTest.kt
new file mode 100644
index 0000000..dc9e3b0
--- /dev/null
+++ b/app/src/main/androidTest/java/CountryFragmentTest.kt
@@ -0,0 +1,40 @@
+import androidx.fragment.app.testing.FragmentScenario;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.espresso.Espresso;
+import androidx.test.espresso.assertion.ViewAssertions;
+import androidx.test.espresso.matcher.ViewMatchers;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import static androidx.test.espresso.matcher.ViewMatchers.withText;
+import androidx.fragment.app.testing.FragmentScenario;
+import androidx.test.espresso.Espresso;
+import androidx.test.espresso.assertion.ViewAssertions;
+import androidx.test.espresso.matcher.ViewMatchers;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class CountryDetailsFragmentTest {
+
+    @Test
+    public void testCountryDetailsDisplayed() {
+        FragmentScenario.launchInContainer(CountryDetailsFragment.class);
+
+        // Assuming the text view with country name has the ID country_name_textview
+        Espresso.onView(ViewMatchers.withId(R.id.country_name_textview))
+                .check(ViewAssertions.matches(withText("USA")));
+    }
+}
+@RunWith(AndroidJUnit4.class)
+public class CountryFragmentTest {
+
+    @Test
+    public void testCountryListDisplayed() {
+        FragmentScenario.launchInContainer(CountryFragment.class);
+
+        // Assuming the RecyclerView for countries has the ID countries_recycler_view
+        Espresso.onView(ViewMatchers.withId(R.id.countries_recycler_view))
+                .check(ViewAssertions.matches(ViewMatchers.isDisplayed()));
+    }
+}
diff --git a/app/src/main/java/com/example/walmart/WalmartApplication.kt b/app/src/main/java/com/example/walmart/WalmartApplication.kt
index bb1f702..0d9d897 100644
--- a/app/src/main/java/com/example/walmart/WalmartApplication.kt
+++ b/app/src/main/java/com/example/walmart/WalmartApplication.kt
@@ -7,6 +7,21 @@ import com.example.walmart.domain.di.ServiceProvider
 import com.example.walmart.domain.di.add
 import com.example.walmart.domain.di.module
 import com.example.walmart.presentation.di.presentationModule
+import static org.junit.Assert.*;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import java.util.Arrays;
+import java.util.List;
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule;
+import androidx.lifecycle.Observer;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import static org.mockito.Mockito.verify;
 
 class WalmartApplication : Application() {
 
@@ -20,4 +35,62 @@ class WalmartApplication : Application() {
             module { add { applicationContext } }
         )
     }
+
+//This test will check the SearchCountryUseCase for different cases:
+//Empty search returns all countries.
+//Exact match returns the correct country.
+//No match returns an empty list.
+
+@RunWith(Parameterized.class)
+public class SearchCountryUseCaseTest {
+
+    private final String searchQuery;
+    private final List<String> expectedCountries;
+
+    public SearchCountryUseCaseTest(String searchQuery, List<String> expectedCountries) {
+        this.searchQuery = searchQuery;
+        this.expectedCountries = expectedCountries;
+    }
+
+    @Parameterized.Parameters
+    public static Iterable<Object[]> data() {
+        return Arrays.asList(new Object[][]{
+            {"", Arrays.asList("USA", "Canada", "Mexico")},  // All countries
+            {"USA", Arrays.asList("USA")},                  // One country match
+            {"xyz", Arrays.asList()},                        // No match
+        });
+    }
+
+    @Test
+    public void testSearchCountry() {
+        SearchCountryUseCase useCase = new SearchCountryUseCase();
+        List<String> result = useCase.searchCountries(searchQuery);
+        assertEquals(expectedCountries, result);
+    }
+}
+
+public class CountriesViewModelTest {
+
+    @Rule
+    public InstantTaskExecutorRule instantTaskExecutorRule = new InstantTaskExecutorRule();
+
+    private CountriesViewModel viewModel;
+
+    @Mock
+    private Observer<List<String>> observer;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        viewModel = new CountriesViewModel();
+        viewModel.getCountries().observeForever(observer);
+    }
+
+    @Test
+    public void testSearch() {
+        String query = "USA";
+        viewModel.searchCountries(query);
+        verify(observer).onChanged(Arrays.asList("USA"));  // Expect that search returns USA
+    }
+}
 }
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