From 5efc5930dabd2abd923813bd29c6e2659f69549b Mon Sep 17 00:00:00 2001
From: dadada <dadada@dadada.li>
Date: Thu, 12 Nov 2020 20:24:59 +0100
Subject: [PATCH] Add tests for MainActivity

---
 .../li/dadada/uuidgen/ui/MainActivityTest.kt  | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 app/src/androidTest/java/li/dadada/uuidgen/ui/MainActivityTest.kt

diff --git a/app/src/androidTest/java/li/dadada/uuidgen/ui/MainActivityTest.kt b/app/src/androidTest/java/li/dadada/uuidgen/ui/MainActivityTest.kt
new file mode 100644
index 0000000..632f6a9
--- /dev/null
+++ b/app/src/androidTest/java/li/dadada/uuidgen/ui/MainActivityTest.kt
@@ -0,0 +1,38 @@
+package li.dadada.uuidgen.ui
+
+import androidx.fragment.app.testing.launchFragmentInContainer
+import androidx.navigation.NavController
+import androidx.navigation.Navigation
+import androidx.navigation.testing.TestNavHostController
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.action.ViewActions.click
+import androidx.test.espresso.matcher.ViewMatchers
+import li.dadada.uuidgen.R
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.junit.Assert.*
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class MainActivityTest {
+
+    @Test
+    fun testOnOptionsItemSelected() {
+        val navController: NavController =
+            TestNavHostController(ApplicationProvider.getApplicationContext())
+        navController.setGraph(R.navigation.nav_graph)
+
+        val scenario = launchFragmentInContainer<UuidGenFragment>()
+
+        // Set the NavController property on the fragment
+        scenario.onFragment { fragment ->
+            Navigation.setViewNavController(fragment.requireView(), navController)
+
+            // Verify that performing a click changes the NavController’s state
+            onView(ViewMatchers.withId(R.id.action_history)).perform(click())
+        }
+        assertEquals(navController.currentDestination?.id, R.id.uuid_list_fragment)
+    }
+}
\ No newline at end of file