Java tutorial
/** * Copyright (c) 2014-present, Facebook, Inc. All rights reserved. * * You are hereby granted a non-exclusive, worldwide, royalty-free license to use, * copy, modify, and distribute this software in source code or binary form for use * in connection with the web services and APIs provided by Facebook. * * As with any software that integrates with the Facebook platform, your use of * this software is subject to the Facebook Developer Principles and Policies * [http://developers.facebook.com/policy/]. This copyright notice shall be * included in all copies or substantial portions of the software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.facebook; import android.graphics.Bitmap; import android.location.Location; import android.net.Uri; import android.os.Bundle; import android.test.suitebuilder.annotation.LargeTest; import com.facebook.internal.GraphUtil; import com.facebook.share.ShareApi; import com.facebook.share.Sharer; import com.facebook.share.internal.ShareInternalUtility; import com.facebook.share.model.ShareOpenGraphAction; import com.facebook.share.model.ShareOpenGraphContent; import com.facebook.share.model.ShareOpenGraphObject; import com.facebook.share.model.SharePhoto; import com.facebook.share.model.SharePhotoContent; import com.facebook.share.model.ShareVideo; import com.facebook.share.model.ShareVideoContent; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URISyntaxException; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.concurrent.atomic.AtomicBoolean; import java.util.concurrent.atomic.AtomicReference; public class RequestTests extends FacebookTestCase { private static final String TEST_OG_OBJECT_TYPE = "facebooksdktests:test"; private static final String TEST_OG_ACTION_TYPE = "facebooksdktests:run"; private static final long REQUEST_TIMEOUT_MILLIS = 10000; protected String[] getDefaultPermissions() { return new String[] { "email", "publish_actions", "read_stream", "user_photos", "user_videos" }; }; @Override public void setUp() throws Exception { super.setUp(); AccessToken.setCurrentAccessToken(getAccessTokenForSharedUser()); } @Override public void tearDown() throws Exception { AccessToken.setCurrentAccessToken(null); super.tearDown(); } @LargeTest public void testExecuteSingleGet() { Bundle parameters = new Bundle(); parameters.putString("fields", "location"); GraphRequest request = new GraphRequest(AccessToken.getCurrentAccessToken(), "TourEiffel", parameters, null); GraphResponse response = request.executeAndWait(); assertTrue(response != null); assertTrue(response.getError() == null); assertNotNull(response.getJSONObject()); assertNotNull(response.getRawResponse()); JSONObject graphPlace = response.getJSONObject(); assertEquals("Paris", graphPlace.optJSONObject("location").optString("city")); } @LargeTest public void testBuildsUploadPhotoHttpURLConnection() throws Exception { Bitmap image = createTestBitmap(128); GraphRequest request = GraphRequest.newUploadPhotoRequest(AccessToken.getCurrentAccessToken(), ShareInternalUtility.MY_PHOTOS, image, "Test photo messsage", null, null); HttpURLConnection connection = GraphRequest.toHttpConnection(request); assertTrue(connection != null); assertNotSame("gzip", connection.getRequestProperty("Content-Encoding")); assertNotSame("application/x-www-form-urlencoded", connection.getRequestProperty("Content-Type")); } @LargeTest public void testExecuteSingleGetUsingHttpURLConnection() throws IOException { Bundle parameters = new Bundle(); parameters.putString("fields", "location"); GraphRequest request = new GraphRequest(AccessToken.getCurrentAccessToken(), "TourEiffel", parameters, null); HttpURLConnection connection = GraphRequest.toHttpConnection(request); assertEquals("gzip", connection.getRequestProperty("Content-Encoding")); assertEquals("application/x-www-form-urlencoded", connection.getRequestProperty("Content-Type")); List<GraphResponse> responses = GraphRequest.executeConnectionAndWait(connection, Arrays.asList(new GraphRequest[] { request })); assertNotNull(responses); assertEquals(1, responses.size()); GraphResponse response = responses.get(0); assertTrue(response != null); assertTrue(response.getError() == null); assertNotNull(response.getJSONObject()); assertNotNull(response.getRawResponse()); JSONObject graphPlace = response.getJSONObject(); assertEquals("Paris", graphPlace.optJSONObject("location").optString("city")); // Make sure calling code can still access HTTP headers and call disconnect themselves. int code = connection.getResponseCode(); assertEquals(200, code); assertTrue(connection.getHeaderFields().keySet().contains("Content-Type")); connection.disconnect(); } @LargeTest public void testFacebookErrorResponseCreatesError() { GraphRequest request = new GraphRequest(null, "somestringthatshouldneverbeavalidfobjectid"); GraphResponse response = request.executeAndWait(); assertTrue(response != null); FacebookRequestError error = response.getError(); assertNotNull(error); FacebookException exception = error.getException(); assertNotNull(exception); assertTrue(exception instanceof FacebookServiceException); assertNotNull(error.getErrorType()); assertTrue(error.getErrorCode() != FacebookRequestError.INVALID_ERROR_CODE); assertNotNull(error.getRequestResultBody()); } @LargeTest public void testRequestWithNoTokenFails() { GraphRequest request = new GraphRequest(null, "me"); GraphResponse response = request.executeAndWait(); assertNotNull(response.getError()); } @LargeTest public void testExecuteRequestMe() { GraphRequest request = GraphRequest.newMeRequest(AccessToken.getCurrentAccessToken(), null); GraphResponse response = request.executeAndWait(); validateMeResponse(AccessToken.getCurrentAccessToken(), response); } static void validateMeResponse(AccessToken accessToken, GraphResponse response) { assertNull(response.getError()); JSONObject me = response.getJSONObject(); assertNotNull(me); assertEquals(accessToken.getUserId(), me.optString("id")); assertNotNull(response.getRawResponse()); } @LargeTest public void testExecuteMyFriendsRequest() { GraphRequest request = GraphRequest.newMyFriendsRequest(AccessToken.getCurrentAccessToken(), null); GraphResponse response = request.executeAndWait(); validateMyFriendsResponse(response); } static void validateMyFriendsResponse(GraphResponse response) { assertNotNull(response); assertNull(response.getError()); JSONObject graphResult = response.getJSONObject(); assertNotNull(graphResult); JSONArray results = graphResult.optJSONArray("data"); assertNotNull(results); assertNotNull(response.getRawResponse()); } @LargeTest public void testExecutePlaceRequestWithLocation() { Location location = new Location(""); location.setLatitude(47.6204); location.setLongitude(-122.3491); GraphRequest request = GraphRequest.newPlacesSearchRequest(AccessToken.getCurrentAccessToken(), location, 5, 5, null, null); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertNull(response.getError()); JSONObject graphResult = response.getJSONObject(); assertNotNull(graphResult); JSONArray results = graphResult.optJSONArray("data"); assertNotNull(results); assertNotNull(response.getRawResponse()); } @LargeTest public void testExecutePlaceRequestWithSearchText() { // Pass a distance without a location to ensure it is correctly ignored. GraphRequest request = GraphRequest.newPlacesSearchRequest(AccessToken.getCurrentAccessToken(), null, 1000, 5, "Starbucks", null); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertNull(response.getError()); JSONObject graphResult = response.getJSONObject(); assertNotNull(graphResult); JSONArray results = graphResult.optJSONArray("data"); assertNotNull(results); assertNotNull(response.getRawResponse()); } @LargeTest public void testExecutePlaceRequestWithLocationAndSearchText() { Location location = new Location(""); location.setLatitude(47.6204); location.setLongitude(-122.3491); GraphRequest request = GraphRequest.newPlacesSearchRequest(AccessToken.getCurrentAccessToken(), location, 1000, 5, "Starbucks", null); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertNull(response.getError()); JSONObject graphResult = response.getJSONObject(); assertNotNull(graphResult); JSONArray results = graphResult.optJSONArray("data"); assertNotNull(results); assertNotNull(response.getRawResponse()); } @LargeTest public void testShareOpenGraphContent() throws Exception { ShareOpenGraphObject ogObject = new ShareOpenGraphObject.Builder().putString("og:title", "a title") .putString("og:type", TEST_OG_OBJECT_TYPE).putString("og:description", "a description").build(); ShareOpenGraphAction ogAction = new ShareOpenGraphAction.Builder().setActionType(TEST_OG_ACTION_TYPE) .putObject("test", ogObject).build(); ShareOpenGraphContent content = new ShareOpenGraphContent.Builder().setAction(ogAction) .setPreviewPropertyName("test").build(); final ShareApi shareApi = new ShareApi(content); final AtomicReference<String> actionId = new AtomicReference<>(null); getActivity().runOnUiThread(new Runnable() { @Override public void run() { shareApi.share(new FacebookCallback<Sharer.Result>() { @Override public void onSuccess(Sharer.Result result) { actionId.set(result.getPostId()); notifyShareFinished(); } @Override public void onCancel() { notifyShareFinished(); } @Override public void onError(FacebookException error) { notifyShareFinished(); } private void notifyShareFinished() { synchronized (shareApi) { shareApi.notifyAll(); } } }); } }); synchronized (shareApi) { shareApi.wait(REQUEST_TIMEOUT_MILLIS); } assertNotNull(actionId.get()); } @LargeTest public void testShareOpenGraphContentWithBadType() throws Exception { ShareOpenGraphObject ogObject = new ShareOpenGraphObject.Builder().putString("og:title", "a title") .putString("og:type", TEST_OG_OBJECT_TYPE).putString("og:description", "a description").build(); ShareOpenGraphAction ogAction = new ShareOpenGraphAction.Builder() .setActionType(TEST_OG_ACTION_TYPE + "bad").putObject("test", ogObject).build(); ShareOpenGraphContent content = new ShareOpenGraphContent.Builder().setAction(ogAction) .setPreviewPropertyName("test").build(); final ShareApi shareApi = new ShareApi(content); final AtomicReference<String> actionId = new AtomicReference<>(null); final AtomicBoolean errorOccurred = new AtomicBoolean(false); getActivity().runOnUiThread(new Runnable() { @Override public void run() { shareApi.share(new FacebookCallback<Sharer.Result>() { @Override public void onSuccess(Sharer.Result result) { actionId.set(result.getPostId()); notifyShareFinished(); } @Override public void onCancel() { notifyShareFinished(); } @Override public void onError(FacebookException error) { errorOccurred.set(true); notifyShareFinished(); } private void notifyShareFinished() { synchronized (shareApi) { shareApi.notifyAll(); } } }); } }); synchronized (shareApi) { shareApi.wait(REQUEST_TIMEOUT_MILLIS); } assertNull(actionId.get()); assertTrue(errorOccurred.get()); } private String executePostOpenGraphRequest() { JSONObject data = new JSONObject(); try { data.put("a_property", "hello"); } catch (JSONException e) { throw new RuntimeException(e); } JSONObject ogObject = GraphUtil.createOpenGraphObjectForPost(TEST_OG_OBJECT_TYPE, "a title", "http://www.facebook.com", "http://www.facebook.com/zzzzzzzzzzzzzzzzzzz", "a description", data, null); Bundle bundle = new Bundle(); bundle.putString("object", ogObject.toString()); GraphRequest request = new GraphRequest(AccessToken.getCurrentAccessToken(), "/me/objects/" + TEST_OG_OBJECT_TYPE, bundle, HttpMethod.POST, null); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertNull(response.getError()); JSONObject graphResult = response.getJSONObject(); assertNotNull(graphResult); assertNotNull(graphResult.optString("id")); assertNotNull(response.getRawResponse()); return graphResult.optString("id"); } @LargeTest public void testExecutePostOpenGraphRequest() { executePostOpenGraphRequest(); } @LargeTest public void testDeleteObjectRequest() { String id = executePostOpenGraphRequest(); GraphRequest request = GraphRequest.newDeleteObjectRequest(AccessToken.getCurrentAccessToken(), id, null); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertNull(response.getError()); JSONObject result = response.getJSONObject(); assertNotNull(result); assertTrue(result.optBoolean(GraphResponse.SUCCESS_KEY)); assertNotNull(response.getRawResponse()); } @LargeTest public void testUpdateOpenGraphObjectRequest() throws JSONException { String id = executePostOpenGraphRequest(); JSONObject data = new JSONObject(); data.put("a_property", "goodbye"); JSONObject ogObject = GraphUtil.createOpenGraphObjectForPost(TEST_OG_OBJECT_TYPE, "another title", null, "http://www.facebook.com/aaaaaaaaaaaaaaaaa", "another description", data, null); Bundle bundle = new Bundle(); bundle.putString("object", ogObject.toString()); GraphRequest request = new GraphRequest(AccessToken.getCurrentAccessToken(), id, bundle, HttpMethod.POST, null); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertNull(response.getError()); JSONObject result = response.getJSONObject(); assertNotNull(result); assertEquals("another title", result.optString("title")); assertNotNull(response.getRawResponse()); } @LargeTest public void testExecuteUploadPhoto() { Bitmap image = createTestBitmap(128); GraphRequest request = GraphRequest.newUploadPhotoRequest(AccessToken.getCurrentAccessToken(), ShareInternalUtility.MY_PHOTOS, image, "Test photo message", null, null); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertNull(response.getError()); JSONObject result = response.getJSONObject(); assertNotNull(result); assertNotNull(response.getRawResponse()); } @LargeTest public void testExecuteUploadPhotoViaFile() throws IOException { File outputFile = null; FileOutputStream outStream = null; try { Bitmap image = createTestBitmap(128); File outputDir = getActivity().getCacheDir(); // context being the Activity pointer outputFile = File.createTempFile("prefix", "extension", outputDir); outStream = new FileOutputStream(outputFile); image.compress(Bitmap.CompressFormat.PNG, 100, outStream); outStream.close(); outStream = null; GraphRequest request = GraphRequest.newUploadPhotoRequest(AccessToken.getCurrentAccessToken(), ShareInternalUtility.MY_PHOTOS, outputFile, "Test photo message", null, null); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertNull(response.getError()); JSONObject result = response.getJSONObject(); assertNotNull(result); assertNotNull(response.getRawResponse()); } finally { if (outStream != null) { outStream.close(); } if (outputFile != null) { outputFile.delete(); } } } @LargeTest public void testExecuteUploadPhotoToAlbum() throws InterruptedException, JSONException { // first create an album Bundle params = new Bundle(); params.putString("name", "Foo"); GraphRequest request = new GraphRequest(AccessToken.getCurrentAccessToken(), "me/albums", params, HttpMethod.POST); GraphResponse response = request.executeAndWait(); JSONObject jsonResponse = response.getJSONObject(); assertNotNull(jsonResponse); String albumId = jsonResponse.optString("id"); assertNotNull(albumId); // upload an image to the album Bitmap image = createTestBitmap(128); SharePhoto photo = new SharePhoto.Builder().setBitmap(image).setUserGenerated(true).build(); SharePhotoContent content = new SharePhotoContent.Builder().addPhoto(photo).build(); final ShareApi shareApi = new ShareApi(content); shareApi.setGraphNode(albumId); final AtomicReference<String> imageId = new AtomicReference<>(null); getActivity().runOnUiThread(new Runnable() { @Override public void run() { shareApi.share(new FacebookCallback<Sharer.Result>() { @Override public void onSuccess(Sharer.Result result) { imageId.set(result.getPostId()); notifyShareFinished(); } @Override public void onCancel() { notifyShareFinished(); } @Override public void onError(FacebookException error) { notifyShareFinished(); } private void notifyShareFinished() { synchronized (shareApi) { shareApi.notifyAll(); } } }); } }); synchronized (shareApi) { shareApi.wait(REQUEST_TIMEOUT_MILLIS); } assertNotNull(imageId.get()); // now check to see if the image is in the album GraphRequest listRequest = new GraphRequest(AccessToken.getCurrentAccessToken(), albumId + "/photos"); GraphResponse listResponse = listRequest.executeAndWait(); JSONObject listObject = listResponse.getJSONObject(); assertNotNull(listObject); JSONArray jsonList = listObject.optJSONArray("data"); assertNotNull(jsonList); boolean found = false; for (int i = 0; i < jsonList.length(); i++) { JSONObject imageObject = jsonList.getJSONObject(i); if (imageId.get().equals(imageObject.optString("id"))) { found = true; } } assertTrue(found); } @LargeTest public void testUploadVideoFile() throws IOException, URISyntaxException { File tempFile = null; try { tempFile = createTempFileFromAsset("DarkScreen.mov"); ShareVideo video = new ShareVideo.Builder().setLocalUrl(Uri.fromFile(tempFile)).build(); ShareVideoContent content = new ShareVideoContent.Builder().setVideo(video).build(); final ShareApi shareApi = new ShareApi(content); final AtomicReference<String> videoId = new AtomicReference<>(null); getActivity().runOnUiThread(new Runnable() { @Override public void run() { shareApi.share(new FacebookCallback<Sharer.Result>() { @Override public void onSuccess(Sharer.Result result) { videoId.set(result.getPostId()); notifyShareFinished(); } @Override public void onCancel() { notifyShareFinished(); } @Override public void onError(FacebookException error) { notifyShareFinished(); } private void notifyShareFinished() { synchronized (shareApi) { shareApi.notifyAll(); } } }); } }); synchronized (shareApi) { shareApi.wait(REQUEST_TIMEOUT_MILLIS); } assertNotNull(videoId.get()); } catch (Exception ex) { fail(); } finally { if (tempFile != null) { tempFile.delete(); } } } @LargeTest public void testUploadVideoFileToUserId() throws IOException, URISyntaxException { File tempFile = null; try { GraphRequest meRequest = GraphRequest.newMeRequest(AccessToken.getCurrentAccessToken(), null); GraphResponse meResponse = meRequest.executeAndWait(); JSONObject meJson = meResponse.getJSONObject(); assertNotNull(meJson); String userId = meJson.optString("id"); assertNotNull(userId); tempFile = createTempFileFromAsset("DarkScreen.mov"); ShareVideo video = new ShareVideo.Builder().setLocalUrl(Uri.fromFile(tempFile)).build(); ShareVideoContent content = new ShareVideoContent.Builder().setVideo(video).build(); final ShareApi shareApi = new ShareApi(content); shareApi.setGraphNode(userId); final AtomicReference<String> videoId = new AtomicReference<>(null); getActivity().runOnUiThread(new Runnable() { @Override public void run() { shareApi.share(new FacebookCallback<Sharer.Result>() { @Override public void onSuccess(Sharer.Result result) { videoId.set(result.getPostId()); notifyShareFinished(); } @Override public void onCancel() { notifyShareFinished(); } @Override public void onError(FacebookException error) { notifyShareFinished(); } private void notifyShareFinished() { synchronized (shareApi) { shareApi.notifyAll(); } } }); } }); synchronized (shareApi) { shareApi.wait(REQUEST_TIMEOUT_MILLIS); } assertNotNull(videoId.get()); } catch (Exception ex) { fail(); } finally { if (tempFile != null) { tempFile.delete(); } } } @LargeTest public void testPostStatusUpdate() { JSONObject statusUpdate = createStatusUpdate(""); JSONObject retrievedStatusUpdate = postGetAndAssert(AccessToken.getCurrentAccessToken(), "me/feed", statusUpdate); assertEquals(statusUpdate.optString("message"), retrievedStatusUpdate.optString("message")); } @LargeTest public void testCallbackIsCalled() { GraphRequest request = new GraphRequest(null, "4"); final ArrayList<Boolean> calledBack = new ArrayList<Boolean>(); request.setCallback(new GraphRequest.Callback() { @Override public void onCompleted(GraphResponse response) { calledBack.add(true); } }); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertTrue(calledBack.size() == 1); } @LargeTest public void testOnProgressCallbackIsCalled() { Bitmap image = Bitmap.createBitmap(128, 128, Bitmap.Config.ALPHA_8); GraphRequest request = GraphRequest.newUploadPhotoRequest(null, ShareInternalUtility.MY_PHOTOS, image, null, null, null); assertTrue(request != null); final ArrayList<Boolean> calledBack = new ArrayList<Boolean>(); request.setCallback(new GraphRequest.OnProgressCallback() { @Override public void onCompleted(GraphResponse response) { } @Override public void onProgress(long current, long max) { calledBack.add(true); } }); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertFalse(calledBack.isEmpty()); } @LargeTest public void testLastOnProgressCallbackIsCalledOnce() { Bitmap image = Bitmap.createBitmap(128, 128, Bitmap.Config.ALPHA_8); GraphRequest request = GraphRequest.newUploadPhotoRequest(null, ShareInternalUtility.MY_PHOTOS, image, null, null, null); assertTrue(request != null); final ArrayList<Boolean> calledBack = new ArrayList<Boolean>(); request.setCallback(new GraphRequest.OnProgressCallback() { @Override public void onCompleted(GraphResponse response) { } @Override public void onProgress(long current, long max) { if (current == max) calledBack.add(true); else if (current > max) calledBack.clear(); } }); GraphResponse response = request.executeAndWait(); assertNotNull(response); assertEquals(1, calledBack.size()); } @LargeTest public void testBatchTimeoutIsApplied() { GraphRequest request = new GraphRequest(null, "me"); GraphRequestBatch batch = new GraphRequestBatch(request); // We assume 5 ms is short enough to fail batch.setTimeout(1); List<GraphResponse> responses = GraphRequest.executeBatchAndWait(batch); assertNotNull(responses); assertTrue(responses.size() == 1); GraphResponse response = responses.get(0); assertNotNull(response); assertNotNull(response.getError()); } @LargeTest public void testBatchTimeoutCantBeNegative() { try { GraphRequestBatch batch = new GraphRequestBatch(); batch.setTimeout(-1); fail(); } catch (IllegalArgumentException ex) { } } @LargeTest public void testCantUseComplexParameterInGetRequest() { Bundle parameters = new Bundle(); parameters.putShortArray("foo", new short[1]); GraphRequest request = new GraphRequest(AccessToken.getCurrentAccessToken(), "me", parameters, HttpMethod.GET, new ExpectFailureCallback()); GraphResponse response = request.executeAndWait(); FacebookRequestError error = response.getError(); assertNotNull(error); FacebookException exception = error.getException(); assertNotNull(exception); assertTrue(exception.getMessage().contains("short[]")); } private final Location SEATTLE_LOCATION = new Location("") { { setLatitude(47.6097); setLongitude(-122.3331); } }; @LargeTest public void testPaging() { final List<JSONObject> returnedPlaces = new ArrayList<JSONObject>(); GraphRequest request = GraphRequest.newPlacesSearchRequest(AccessToken.getCurrentAccessToken(), SEATTLE_LOCATION, 1000, 3, null, new GraphRequest.GraphJSONArrayCallback() { @Override public void onCompleted(JSONArray places, GraphResponse response) { if (places == null) { assertNotNull(places); } for (int i = 0; i < places.length(); ++i) { returnedPlaces.add(places.optJSONObject(i)); } } }); GraphResponse response = request.executeAndWait(); assertNull(response.getError()); assertNotNull(response.getJSONObject()); assertNotSame(0, returnedPlaces.size()); returnedPlaces.clear(); GraphRequest nextRequest = response.getRequestForPagedResults(GraphResponse.PagingDirection.NEXT); assertNotNull(nextRequest); nextRequest.setCallback(request.getCallback()); response = nextRequest.executeAndWait(); assertNull(response.getError()); assertNotNull(response.getJSONObject()); assertNotSame(0, returnedPlaces.size()); returnedPlaces.clear(); GraphRequest previousRequest = response.getRequestForPagedResults(GraphResponse.PagingDirection.PREVIOUS); assertNotNull(previousRequest); previousRequest.setCallback(request.getCallback()); response = previousRequest.executeAndWait(); assertNull(response.getError()); assertNotNull(response.getJSONObject()); assertNotSame(0, returnedPlaces.size()); } }