Fix fragment swipe test

Author: EmmanuelMess

app/src/androidTest/java/com/amaze/filemanager/ui/fragments/TabFragmentTest.kt

@@ -1,19 +1,26 @@
 package com.amaze.filemanager.ui.fragments
 
 import android.content.pm.ActivityInfo
+import android.graphics.Rect
 import android.os.Build.VERSION.SDK_INT
 import android.os.Build.VERSION_CODES.TIRAMISU
+import android.view.View
 import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.UiController
+import androidx.test.espresso.ViewAction
 import androidx.test.espresso.action.ViewActions.swipeLeft
 import androidx.test.espresso.action.ViewActions.swipeRight
+import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
 import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.rule.ActivityTestRule
 import androidx.test.rule.GrantPermissionRule
+import androidx.test.uiautomator.UiDevice
 import com.amaze.filemanager.R
 import com.amaze.filemanager.test.StoragePermissionHelper
 import com.amaze.filemanager.ui.activities.MainActivity
+import org.hamcrest.Matcher
 import org.junit.Before
 import org.junit.Rule
 import org.junit.Test
@@ -81,7 +88,7 @@ class TabFragmentTest {
     @Test
     fun testFragmentStateSavingDuringConfigChange() {
         // First perform the swipe action
-        onView(withId(R.id.pager)).perform(swipeLeft())
+        swipeLeftCompat(withId(R.id.pager))
 
         // Force a configuration change by rotating the screen
         activityRule.activity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
@@ -96,9 +103,9 @@ class TabFragmentTest {
     fun testRapidTabSwitchingAndStateSaving() {
         // Perform rapid tab switches
         repeat(10) {
-            onView(withId(R.id.pager)).perform(swipeLeft())
+            swipeLeftCompat(withId(R.id.pager))
             Thread.sleep(100) // Small delay to ensure swipe completes
-            onView(withId(R.id.pager)).perform(swipeRight())
+            swipeRightCompat(withId(R.id.pager))
             Thread.sleep(100) // Small delay to ensure swipe completes
         }
 
@@ -112,7 +119,7 @@ class TabFragmentTest {
     @Test
     fun testFragmentDetachmentAndStateSaving() {
         // First switch to a different tab
-        onView(withId(R.id.pager)).perform(swipeLeft())
+        swipeLeftCompat(withId(R.id.pager))
 
         // Get the TabFragment
         InstrumentationRegistry.getInstrumentation().runOnMainSync {
@@ -131,4 +138,67 @@ class TabFragmentTest {
         // Force state save through configuration change
         activityRule.activity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
     }
+
+    /**
+     * Hack that works like swipeLeft or swipeRight on smaller screens
+     */
+    private fun swipeHack(
+        interpolatorX: Float,
+        interpolatorY: Float,
+        viewMatcher: Matcher<View>,
+    ) {
+        /* HACK
+         If the View items are contained inside a ScrollView, and the screen's height is not
+          enough to show 90% of the ScrollView, an error is thrown. This is a problem for smaller
+          screens, to fix this we simply run the swipe "manually".
+          See https://stackoverflow.com/a/74361805/3124150
+         */
+
+        onView(viewMatcher).perform(
+            object : ViewAction {
+                override fun getConstraints(): Matcher<View> = isDisplayed()
+
+                override fun getDescription(): String = "Swipe without checking rect availability"
+
+                override fun perform(
+                    uiController: UiController,
+                    view: View,
+                ) {
+                    val device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation())
+                    val visibleRect = Rect()
+                    view.getGlobalVisibleRect(visibleRect)
+
+                    val endX = visibleRect.left + (visibleRect.right * interpolatorX).toInt()
+                    val endY = visibleRect.top + (visibleRect.bottom * interpolatorY).toInt()
+
+                    // Swipe up from the center, at 5ms per step
+                    device.swipe(
+                        visibleRect.centerX(),
+                        visibleRect.centerY(),
+                        endX,
+                        endY,
+                        10,
+                    )
+                }
+            },
+        )
+    }
+
+    private fun swipeLeftCompat(viewMatcher: Matcher<View>) {
+        val device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation())
+        if (device.displayHeight <= 1280) {
+            swipeHack(0.95f, 0.5f, viewMatcher)
+        } else {
+            onView(viewMatcher).perform(swipeLeft())
+        }
+    }
+
+    private fun swipeRightCompat(viewMatcher: Matcher<View>) {
+        val device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation())
+        if (device.displayHeight <= 1280) {
+            swipeHack(0.05f, 0.5f, viewMatcher)
+        } else {
+            onView(viewMatcher).perform(swipeRight())
+        }
+    }
 }