From 506c8d6c5fe78e297f3a0180cf24f71efd0bfc80 Mon Sep 17 00:00:00 2001
From: Alexander Shalamov <alexander.shalamov@mapbox.com>
Date: Tue, 7 May 2019 14:10:17 +0300
Subject: [android] Add unit test for onRemoveUnusedStyleImages API

---
 .../testapp/maps/RemoveUnusedImagesTest.kt         | 162 +++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/maps/RemoveUnusedImagesTest.kt

diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/maps/RemoveUnusedImagesTest.kt b/platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/maps/RemoveUnusedImagesTest.kt
new file mode 100644
index 0000000000..d42494b3e9
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/maps/RemoveUnusedImagesTest.kt
@@ -0,0 +1,162 @@
+package com.mapbox.mapboxsdk.testapp.maps
+
+import android.graphics.Bitmap
+import android.support.test.rule.ActivityTestRule
+import android.support.test.runner.AndroidJUnit4
+import com.mapbox.mapboxsdk.camera.CameraUpdateFactory
+import com.mapbox.mapboxsdk.geometry.LatLng
+import com.mapbox.mapboxsdk.maps.MapView
+import com.mapbox.mapboxsdk.maps.MapboxMap
+import com.mapbox.mapboxsdk.maps.Style
+import com.mapbox.mapboxsdk.testapp.R
+import com.mapbox.mapboxsdk.testapp.activity.espresso.EspressoTestActivity
+import org.junit.Assert.*
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import java.util.concurrent.CountDownLatch
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.TimeoutException
+
+@RunWith(AndroidJUnit4::class)
+class RemoveUnusedImagesTest {
+
+  @Rule
+  @JvmField
+  var rule = ActivityTestRule(EspressoTestActivity::class.java)
+
+  private lateinit var mapView: MapView
+  private lateinit var mapboxMap: MapboxMap
+  private val latch = CountDownLatch(1)
+
+  @Before
+  fun setup() {
+    rule.runOnUiThread {
+      mapView = rule.activity.findViewById(R.id.mapView)
+      mapView.getMapAsync {
+        mapboxMap = it;
+        mapboxMap.setStyle(Style.Builder().fromJson(styleJson))
+      }
+    }
+  }
+
+  @Test
+  fun testRemoveUnusedImagesUserProvidedListener() {
+    var callbackLatch = CountDownLatch(2)
+    rule.runOnUiThread {
+      mapView.addOnStyleImageMissingListener {
+        mapboxMap.style!!.addImage(it, Bitmap.createBitmap(512, 512,  Bitmap.Config.ARGB_8888))
+      }
+
+      // Remove layer and source, so that rendered tiles are no longer used, therefore, map must
+      // notify client about unused images.
+      mapView.addOnDidBecomeIdleListener {
+        mapboxMap.style!!.removeLayer("icon")
+        mapboxMap.style!!.removeSource("geojson")
+      }
+
+      mapView.addOnCanRemoveUnusedStyleImageListener {
+        callbackLatch.countDown()
+        mapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(LatLng(0.0, 120.0), 8.0))
+        mapView.addOnDidFinishRenderingFrameListener {
+          assertNotNull(mapboxMap.style!!.getImage("small"))
+          assertNotNull(mapboxMap.style!!.getImage("large"))
+          latch.countDown()
+        }
+        return@addOnCanRemoveUnusedStyleImageListener false
+      }
+    }
+
+    if(!latch.await(5, TimeUnit.SECONDS) && !callbackLatch.await(5, TimeUnit.SECONDS)){
+      throw TimeoutException()
+    }
+  }
+
+  @Test
+  fun testRemoveUnusedImagesDefaultListener() {
+    rule.runOnUiThread {
+      mapView.addOnStyleImageMissingListener {
+        mapboxMap.style!!.addImage(it, Bitmap.createBitmap(512, 512,  Bitmap.Config.ARGB_8888))
+      }
+
+      // Remove layer and source, so that rendered tiles are no longer used, thus
+      // map must request removal of unused images.
+      mapView.addOnDidBecomeIdleListener {
+        mapboxMap.style!!.removeLayer("icon")
+        mapboxMap.style!!.removeSource("geojson")
+        mapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(LatLng(0.0, 120.0), 8.0))
+
+        // Wait for the next frame and check that images were removed from the style.
+        mapView.addOnDidFinishRenderingFrameListener {
+          if (mapboxMap.style!!.getImage("small") == null && mapboxMap.style!!.getImage("large") == null) {
+            latch.countDown()
+          }
+        }
+      }
+    }
+
+    if(!latch.await(5, TimeUnit.SECONDS)){
+      throw TimeoutException()
+    }
+  }
+
+  companion object {
+    private const val styleJson = """
+    {
+      "version": 8,
+      "name": "Mapbox Streets",
+      "sources": {
+        "geojson": {
+          "type": "geojson",
+          "data": {
+            "type": "FeatureCollection",
+            "features": [
+              {
+                "type": "Feature",
+                "properties": {
+                  "image": "small"
+                },
+                "geometry": {
+                  "type": "Point",
+                  "coordinates": [
+                    0,
+                    0
+                  ]
+                }
+              },
+              {
+                "type": "Feature",
+                "properties": {
+                  "image": "large"
+                },
+                "geometry": {
+                  "type": "Point",
+                  "coordinates": [
+                    1,
+                    1
+                  ]
+                }
+              }
+            ]
+          }
+        }
+      },
+      "layers": [{
+        "id": "bg",
+        "type": "background",
+        "paint": {
+          "background-color": "#f00"
+        }
+      },{
+        "id": "icon",
+        "type": "symbol",
+        "source": "geojson",
+        "layout": {
+          "icon-image": ["get", "image"]
+        }
+      }]
+    }
+    """
+  }
+}
-- 
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