Add Test scenario for 'recentSearchQueries' deletion

feature/search/src/test/kotlin/com/google/samples/apps/nowinandroid/feature/search/SearchViewModelTest.kt

@@ -42,6 +42,7 @@ import org.junit.Rule
 import org.junit.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertIs
+import kotlin.test.assertTrue
 
 /**
  * To learn more about how this test handles Flows created with stateIn, see
@@ -121,6 +122,20 @@ class SearchViewModelTest {
         collectJob.cancel()
     }
 
+    @Test
+    fun recentSearches_verifyQueryHistoryClear() = runTest {
+        val collectJob = launch(UnconfinedTestDispatcher()) { viewModel.recentSearchQueriesUiState.collect() }
+
+        viewModel.onSearchTriggered("kotlin")
+        viewModel.clearRecentSearches()
+
+        val result = viewModel.recentSearchQueriesUiState.value
+        assertIs<Success>(result)
+        assertTrue(result.recentQueries.isEmpty())
+
+        collectJob.cancel()
+    }
+
     @Test
     fun searchNotReady_withNoFtsTableEntity() = runTest {
         val collectJob = launch(UnconfinedTestDispatcher()) { viewModel.searchResultUiState.collect() }