[android] Call callback.onFinish() when camera is already at the correct position

[android] Call callback.onFinish() when camera is already at the correct position

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/Transform.java

@@ -120,6 +120,8 @@ public final class Transform implements MapView.OnCameraDidChangeListener {
           }
         }
       });
+    } else if (callback != null) {
+      callback.onFinish();
     }
   }
 
@@ -137,6 +139,8 @@ public final class Transform implements MapView.OnCameraDidChangeListener {
       mapView.addOnCameraDidChangeListener(this);
       nativeMap.easeTo(cameraPosition.target, cameraPosition.zoom, cameraPosition.bearing, cameraPosition.tilt,
         cameraPosition.padding, durationMs, easingInterpolator);
+    } else if (callback != null) {
+      callback.onFinish();
     }
   }
 
@@ -157,6 +161,8 @@ public final class Transform implements MapView.OnCameraDidChangeListener {
       mapView.addOnCameraDidChangeListener(this);
       nativeMap.flyTo(cameraPosition.target, cameraPosition.zoom, cameraPosition.bearing,
         cameraPosition.tilt, cameraPosition.padding, durationMs);
+    } else if (callback != null) {
+      callback.onFinish();
     }
   }
 

platform/android/MapboxGLAndroidSDK/src/test/java/com/mapbox/mapboxsdk/maps/TransformTest.kt

@@ -26,6 +26,7 @@ class TransformTest {
     every { nativeMapView.cameraPosition } returns CameraPosition.DEFAULT
     every { nativeMapView.cancelTransitions() } answers {}
     every { nativeMapView.jumpTo(any(), any(), any(), any(), any()) } answers {}
+    every { nativeMapView.easeTo(any(), any(), any(), any(), any(), any(), any()) } answers {}
     every { nativeMapView.flyTo(any(), any(), any(), any(), any(), any()) } answers {}
     every { nativeMapView.minZoom = any() } answers {}
     every { nativeMapView.maxZoom = any() } answers {}
@@ -48,6 +49,102 @@ class TransformTest {
     verify { callback.onFinish() }
   }
 
+  @Test
+  fun testMoveCameraToSamePosition() {
+    val mapboxMap = mockk<MapboxMap>()
+    every { mapboxMap.cameraPosition } answers { CameraPosition.DEFAULT }
+
+    val callback = mockk<MapboxMap.CancelableCallback>()
+    every { callback.onFinish() } answers {}
+
+    val expected = CameraPosition.DEFAULT
+    val update = CameraUpdateFactory.newCameraPosition(expected)
+
+    transform.moveCamera(mapboxMap, update, null) // Initialize camera position
+    transform.moveCamera(mapboxMap, update, callback)
+
+    verify(exactly = 1, verifyBlock = { nativeMapView.jumpTo(any(), any(), any(), any(), any()) })
+    verify { callback.onFinish() }
+  }
+
+  @Test
+  fun testEaseCamera() {
+    val mapboxMap = mockk<MapboxMap>()
+    every { mapboxMap.cameraPosition } answers { CameraPosition.DEFAULT }
+
+    every { mapView.addOnCameraDidChangeListener(any()) } answers { transform.onCameraDidChange(true) }
+    every { mapView.removeOnCameraDidChangeListener(any()) } answers {}
+
+    val callback = mockk<MapboxMap.CancelableCallback>()
+    every { callback.onFinish() } answers {}
+
+    val target = LatLng(1.0, 2.0)
+    val expected = CameraPosition.Builder().target(target).build()
+    val update = CameraUpdateFactory.newCameraPosition(expected)
+
+    transform.easeCamera(mapboxMap, update, 100, false, callback)
+
+    verify { nativeMapView.easeTo(target, -1.0, -1.0, -1.0, null, 100, false) }
+    verify { callback.onFinish() }
+  }
+
+  @Test
+  fun testEaseCameraToSamePosition() {
+    val mapboxMap = mockk<MapboxMap>()
+    every { mapboxMap.cameraPosition } answers { CameraPosition.DEFAULT }
+
+    val callback = mockk<MapboxMap.CancelableCallback>()
+    every { callback.onFinish() } answers {}
+
+    val expected = CameraPosition.DEFAULT
+    val update = CameraUpdateFactory.newCameraPosition(expected)
+    transform.moveCamera(mapboxMap, update, null)
+
+    transform.easeCamera(mapboxMap, update, 100, false, callback)
+
+    verify(exactly = 0, verifyBlock = { nativeMapView.easeTo(any(), any(), any(), any(), any(), any(), any()) })
+    verify { callback.onFinish() }
+  }
+
+  @Test
+  fun testAnimateCamera() {
+    val mapboxMap = mockk<MapboxMap>()
+    every { mapboxMap.cameraPosition } answers { CameraPosition.DEFAULT }
+
+    every { mapView.addOnCameraDidChangeListener(any()) } answers { transform.onCameraDidChange(true) }
+    every { mapView.removeOnCameraDidChangeListener(any()) } answers {}
+
+    val callback = mockk<MapboxMap.CancelableCallback>()
+    every { callback.onFinish() } answers {}
+
+    val target = LatLng(1.0, 2.0)
+    val expected = CameraPosition.Builder().target(target).build()
+    val update = CameraUpdateFactory.newCameraPosition(expected)
+
+    transform.animateCamera(mapboxMap, update, 100, callback)
+
+    verify { nativeMapView.flyTo(target, -1.0, -1.0, -1.0, null, 100) }
+    verify { callback.onFinish() }
+  }
+
+  @Test
+  fun testAnimateCameraToSamePosition() {
+    val mapboxMap = mockk<MapboxMap>()
+    every { mapboxMap.cameraPosition } answers { CameraPosition.DEFAULT }
+
+    val callback = mockk<MapboxMap.CancelableCallback>()
+    every { callback.onFinish() } answers {}
+
+    val expected = CameraPosition.DEFAULT
+    val update = CameraUpdateFactory.newCameraPosition(expected)
+    transform.moveCamera(mapboxMap, update, null)
+
+    transform.animateCamera(mapboxMap, update, 100, callback)
+
+    verify(exactly = 0, verifyBlock = { nativeMapView.flyTo(any(), any(), any(), any(), any(), any()) })
+    verify { callback.onFinish() }
+  }
+
   @Test
   fun testMinZoom() {
     transform.minZoom = 10.0