Add WelcomeActivityTest (#2636)

* Add WelcomeActivityTest

* Convert WelcomeActivityTest to Kotlin

Author: domdomegg

app/src/androidTest/java/fr/free/nrw/commons/WelcomeActivityTest.kt

@@ -0,0 +1,37 @@
+package fr.free.nrw.commons
+
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
+import androidx.test.espresso.matcher.ViewMatchers.withId
+import androidx.test.filters.LargeTest
+import androidx.test.rule.ActivityTestRule
+import androidx.test.runner.AndroidJUnit4
+import fr.free.nrw.commons.utils.ConfigUtils
+import org.hamcrest.core.IsNot.not
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@LargeTest
+@RunWith(AndroidJUnit4::class)
+class WelcomeActivityTest {
+    @get:Rule
+    var activityRule: ActivityTestRule<*> = ActivityTestRule(WelcomeActivity::class.java)
+
+    @Test
+    fun ifBetaShowsSkipButton() {
+        if (ConfigUtils.isBetaFlavour()) {
+            onView(withId(R.id.finishTutorialButton))
+                    .check(matches(isDisplayed()))
+        }
+    }
+
+    @Test
+    fun ifProdHidesSkipButton() {
+        if (!ConfigUtils.isBetaFlavour()) {
+            onView(withId(R.id.finishTutorialButton))
+                    .check(matches(not(isDisplayed())))
+        }
+    }
+}