added test for switching primary route

Author: vadzim-vys

instrumentation-tests/src/androidTest/java/com/mapbox/navigation/instrumentation_tests/core/RoutesPreviewTest.kt

@@ -22,6 +22,7 @@ import com.mapbox.navigation.instrumentation_tests.utils.routes.RoutesProvider.t
 import com.mapbox.navigation.testing.ui.BaseTest
 import com.mapbox.navigation.testing.ui.utils.getMapboxAccessTokenFromResources
 import com.mapbox.navigation.testing.ui.utils.runOnMainSync
+import kotlinx.coroutines.flow.drop
 import kotlinx.coroutines.flow.first
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNull
@@ -136,4 +137,55 @@ class RoutesPreviewTest : BaseTest<EmptyTestActivity>(EmptyTestActivity::class.j
             it.navigationRoute == updatedRoutes[0]
         }
     }
+
+    @Test
+    fun start_active_guidance_from_previewed_alternative_route() = sdkTest {
+        // set routes preview
+        val routes = RoutesProvider.dc_short_with_alternative(activity).toNavigationRoutes()
+        mapboxNavigation.setRoutesPreview(routes)
+        val preview = mapboxNavigation.routesPreviewUpdates()
+            .first { it.reason == RoutesPreviewUpdateReasons.PREVIEW_NEW }
+        // switch to alternative route
+        mapboxNavigation.changeRoutesPreviewPrimaryRoute(
+            preview.routesPreview!!.originalRoutesList[1]
+        )
+        val updatedPreview = mapboxNavigation.routesPreviewUpdates()
+            .first { it != preview }
+        // start active guidance
+        mapboxNavigation.setNavigationRoutes(updatedPreview.routesPreview!!.routesList)
+        mapboxNavigation.setRoutesPreview(emptyList())
+        val routesUpdate = mapboxNavigation.routesUpdates()
+            .first { it.reason == RoutesExtra.ROUTES_UPDATE_REASON_NEW }
+        assertEquals(
+            listOf(
+                routes[1],
+                routes[0]
+            ),
+            routesUpdate.navigationRoutes
+        )
+        val previewAlternativeMetadata = updatedPreview.routesPreview!!.alternativesMetadata.first()
+        val activeGuidanceAlternativeMetadata = mapboxNavigation
+            .getAlternativeMetadataFor(routes[0])!!
+//        Doesn't pass as they have different alternative ids
+//        assertEquals(
+//            previewAlternativeMetadata,
+//            activeGuidanceAlternativeMetadata
+//        )
+        assertEquals(
+            previewAlternativeMetadata.infoFromStartOfPrimary,
+            activeGuidanceAlternativeMetadata.infoFromStartOfPrimary
+        )
+        assertEquals(
+            previewAlternativeMetadata.forkIntersectionOfAlternativeRoute,
+            activeGuidanceAlternativeMetadata.forkIntersectionOfAlternativeRoute
+        )
+        assertEquals(
+            previewAlternativeMetadata.infoFromFork,
+            activeGuidanceAlternativeMetadata.infoFromFork
+        )
+        assertEquals(
+            previewAlternativeMetadata.forkIntersectionOfPrimaryRoute,
+            activeGuidanceAlternativeMetadata.forkIntersectionOfPrimaryRoute
+        )
+    }
 }