src/test/java/net/pterodactylus/sone/core/FreenetInterfaceTest.java

   1 package net.pterodactylus.sone.core;
   2
   3 import static freenet.client.FetchException.FetchExceptionMode.ALL_DATA_NOT_FOUND;
   4 import static freenet.keys.InsertableClientSSK.createRandom;
   5 import static freenet.node.RequestStarter.INTERACTIVE_PRIORITY_CLASS;
   6 import static freenet.node.RequestStarter.PREFETCH_PRIORITY_CLASS;
   7 import static net.pterodactylus.sone.test.Matchers.delivers;
   8 import static net.pterodactylus.sone.test.TestUtil.setFinalField;
   9 import static org.hamcrest.MatcherAssert.assertThat;
  10 import static org.hamcrest.Matchers.is;
  11 import static org.hamcrest.Matchers.notNullValue;
  12 import static org.hamcrest.Matchers.nullValue;
  13 import static org.mockito.ArgumentCaptor.forClass;
  14 import static org.mockito.ArgumentMatchers.any;
  15 import static org.mockito.ArgumentMatchers.anyBoolean;
  16 import static org.mockito.ArgumentMatchers.anyLong;
  17 import static org.mockito.ArgumentMatchers.anyShort;
  18 import static org.mockito.ArgumentMatchers.eq;
  19 import static org.mockito.Mockito.doNothing;
  20 import static org.mockito.Mockito.mock;
  21 import static org.mockito.Mockito.never;
  22 import static org.mockito.Mockito.times;
  23 import static org.mockito.Mockito.verify;
  24 import static org.mockito.Mockito.verifyNoMoreInteractions;
  25 import static org.mockito.Mockito.when;
  26 import static org.mockito.Mockito.withSettings;
  27
  28 import java.io.IOException;
  29 import java.net.MalformedURLException;
  30 import java.util.HashMap;
  31
  32 import net.pterodactylus.sone.core.FreenetInterface.BackgroundFetchCallback;
  33 import net.pterodactylus.sone.core.FreenetInterface.Callback;
  34 import net.pterodactylus.sone.core.FreenetInterface.Fetched;
  35 import net.pterodactylus.sone.core.FreenetInterface.InsertToken;
  36 import net.pterodactylus.sone.core.FreenetInterface.InsertTokenSupplier;
  37 import net.pterodactylus.sone.core.event.ImageInsertAbortedEvent;
  38 import net.pterodactylus.sone.core.event.ImageInsertFailedEvent;
  39 import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
  40 import net.pterodactylus.sone.core.event.ImageInsertStartedEvent;
  41 import net.pterodactylus.sone.data.Image;
  42 import net.pterodactylus.sone.data.Sone;
  43 import net.pterodactylus.sone.data.TemporaryImage;
  44 import net.pterodactylus.sone.data.impl.ImageImpl;
  45 import net.pterodactylus.sone.test.TestUtil;
  46
  47 import freenet.client.ClientMetadata;
  48 import freenet.client.FetchContext;
  49 import freenet.client.FetchException;
  50 import freenet.client.FetchException.FetchExceptionMode;
  51 import freenet.client.FetchResult;
  52 import freenet.client.HighLevelSimpleClient;
  53 import freenet.client.InsertBlock;
  54 import freenet.client.InsertContext;
  55 import freenet.client.InsertException;
  56 import freenet.client.InsertException.InsertExceptionMode;
  57 import freenet.client.Metadata;
  58 import freenet.client.async.ClientContext;
  59 import freenet.client.async.ClientGetCallback;
  60 import freenet.client.async.ClientGetter;
  61 import freenet.client.async.ClientPutter;
  62 import freenet.client.async.SnoopMetadata;
  63 import freenet.client.async.USKCallback;
  64 import freenet.client.async.USKManager;
  65 import freenet.crypt.DummyRandomSource;
  66 import freenet.crypt.RandomSource;
  67 import freenet.keys.FreenetURI;
  68 import freenet.keys.InsertableClientSSK;
  69 import freenet.keys.USK;
  70 import freenet.node.Node;
  71 import freenet.node.NodeClientCore;
  72 import freenet.node.RequestClient;
  73 import freenet.support.Base64;
  74 import freenet.support.api.Bucket;
  75 import freenet.support.io.ArrayBucket;
  76 import freenet.support.io.ResumeFailedException;
  77
  78 import com.google.common.eventbus.EventBus;
  79 import org.junit.Before;
  80 import org.junit.Test;
  81 import org.mockito.ArgumentCaptor;
  82 import org.mockito.ArgumentMatchers;
  83
  84 /**
  85  * Unit test for {@link FreenetInterface}.
  86  *
  87  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  88  */
  89 public class FreenetInterfaceTest {
  90
  91         private final EventBus eventBus = mock(EventBus.class);
  92         private final Node node = mock(Node.class);
  93         private final NodeClientCore nodeClientCore = mock(NodeClientCore.class);
  94         private final HighLevelSimpleClient highLevelSimpleClient = mock(HighLevelSimpleClient.class, withSettings().extraInterfaces(RequestClient.class));
  95         private final RandomSource randomSource = new DummyRandomSource();
  96         private final USKManager uskManager = mock(USKManager.class);
  97         private FreenetInterface freenetInterface;
  98         private final Sone sone = mock(Sone.class);
  99         private final ArgumentCaptor<USKCallback> callbackCaptor = forClass(USKCallback.class);
 100         private final Image image = mock(Image.class);
 101         private InsertToken insertToken;
 102         private final Bucket bucket = mock(Bucket.class);
 103         private final ArgumentCaptor<ClientGetCallback> clientGetCallback = forClass(ClientGetCallback.class);
 104         private final FreenetURI uri = new FreenetURI("KSK@pgl.png");
 105         private final FetchResult fetchResult = mock(FetchResult.class);
 106         private final BackgroundFetchCallback backgroundFetchCallback = mock(BackgroundFetchCallback.class);
 107         private final ClientGetter clientGetter = mock(ClientGetter.class);
 108
 109         public FreenetInterfaceTest() throws MalformedURLException {
 110         }
 111
 112         @Before
 113         public void setupHighLevelSimpleClient() throws Exception {
 114                 when(highLevelSimpleClient.getFetchContext()).thenReturn(mock(FetchContext.class));
 115                 when(highLevelSimpleClient.fetch(eq(uri), anyLong(), any(ClientGetCallback.class), any(FetchContext.class), anyShort())).thenReturn( clientGetter);
 116         }
 117
 118         @Before
 119         public void setupFreenetInterface() {
 120                 when(nodeClientCore.makeClient(anyShort(), anyBoolean(), anyBoolean())).thenReturn(highLevelSimpleClient);
 121                 setFinalField(node, "clientCore", nodeClientCore);
 122                 setFinalField(node, "random", randomSource);
 123                 setFinalField(nodeClientCore, "uskManager", uskManager);
 124                 setFinalField(nodeClientCore, "clientContext", mock(ClientContext.class));
 125                 freenetInterface = new FreenetInterface(eventBus, node);
 126                 insertToken = freenetInterface.new InsertToken(image);
 127                 insertToken.setBucket(bucket);
 128         }
 129
 130         @Before
 131         public void setupSone() {
 132                 InsertableClientSSK insertSsk = createRandom(randomSource, "test-0");
 133                 when(sone.getId()).thenReturn(Base64.encode(insertSsk.getURI().getRoutingKey()));
 134                 when(sone.getRequestUri()).thenReturn(insertSsk.getURI().uskForSSK());
 135         }
 136
 137         @Before
 138         public void setupCallbackCaptorAndUskManager() {
 139                 doNothing().when(uskManager).subscribe(any(USK.class), callbackCaptor.capture(), anyBoolean(), any(RequestClient.class));
 140         }
 141
 142         @Test
 143         public void canFetchUri() throws MalformedURLException, FetchException {
 144                 FreenetURI freenetUri = new FreenetURI("KSK@GPLv3.txt");
 145                 FetchResult fetchResult = createFetchResult();
 146                 when(highLevelSimpleClient.fetch(freenetUri)).thenReturn(fetchResult);
 147                 Fetched fetched = freenetInterface.fetchUri(freenetUri);
 148                 assertThat(fetched, notNullValue());
 149                 assertThat(fetched.getFetchResult(), is(fetchResult));
 150                 assertThat(fetched.getFreenetUri(), is(freenetUri));
 151         }
 152
 153         @Test
 154         public void fetchFollowsRedirect() throws MalformedURLException, FetchException {
 155                 FreenetURI freenetUri = new FreenetURI("KSK@GPLv2.txt");
 156                 FreenetURI newFreenetUri = new FreenetURI("KSK@GPLv3.txt");
 157                 FetchResult fetchResult = createFetchResult();
 158                 FetchException fetchException = new FetchException(FetchExceptionMode.PERMANENT_REDIRECT, newFreenetUri);
 159                 when(highLevelSimpleClient.fetch(freenetUri)).thenThrow(fetchException);
 160                 when(highLevelSimpleClient.fetch(newFreenetUri)).thenReturn(fetchResult);
 161                 Fetched fetched = freenetInterface.fetchUri(freenetUri);
 162                 assertThat(fetched.getFetchResult(), is(fetchResult));
 163                 assertThat(fetched.getFreenetUri(), is(newFreenetUri));
 164         }
 165
 166         @Test
 167         public void fetchReturnsNullOnFetchExceptions() throws MalformedURLException, FetchException {
 168                 FreenetURI freenetUri = new FreenetURI("KSK@GPLv2.txt");
 169                 FetchException fetchException = new FetchException(ALL_DATA_NOT_FOUND);
 170                 when(highLevelSimpleClient.fetch(freenetUri)).thenThrow(fetchException);
 171                 Fetched fetched = freenetInterface.fetchUri(freenetUri);
 172                 assertThat(fetched, nullValue());
 173         }
 174
 175         private FetchResult createFetchResult() {
 176                 ClientMetadata clientMetadata = new ClientMetadata("text/plain");
 177                 Bucket bucket = new ArrayBucket("Some Data.".getBytes());
 178                 return new FetchResult(clientMetadata, bucket);
 179         }
 180
 181         @Test
 182         public void insertingAnImage() throws SoneException, InsertException, IOException {
 183                 TemporaryImage temporaryImage = new TemporaryImage("image-id");
 184                 temporaryImage.setMimeType("image/png");
 185                 byte[] imageData = new byte[] { 1, 2, 3, 4 };
 186                 temporaryImage.setImageData(imageData);
 187                 Image image = new ImageImpl("image-id");
 188                 InsertToken insertToken = freenetInterface.new InsertToken(image);
 189                 InsertContext insertContext = mock(InsertContext.class);
 190                 when(highLevelSimpleClient.getInsertContext(anyBoolean())).thenReturn(insertContext);
 191                 ClientPutter clientPutter = mock(ClientPutter.class);
 192                 ArgumentCaptor<InsertBlock> insertBlockCaptor = forClass(InsertBlock.class);
 193                 when(highLevelSimpleClient.insert(insertBlockCaptor.capture(), eq((String) null), eq(false), eq(insertContext), eq(insertToken), anyShort())).thenReturn(clientPutter);
 194                 freenetInterface.insertImage(temporaryImage, image, insertToken);
 195                 assertThat(insertBlockCaptor.getValue().getData().getInputStream(), delivers(new byte[] { 1, 2, 3, 4 }));
 196                 assertThat(TestUtil.<ClientPutter>getPrivateField(insertToken, "clientPutter"), is(clientPutter));
 197                 verify(eventBus).post(any(ImageInsertStartedEvent.class));
 198         }
 199
 200         @Test(expected = SoneInsertException.class)
 201         public void insertExceptionCausesASoneException() throws InsertException, SoneException, IOException {
 202                 TemporaryImage temporaryImage = new TemporaryImage("image-id");
 203                 temporaryImage.setMimeType("image/png");
 204                 byte[] imageData = new byte[] { 1, 2, 3, 4 };
 205                 temporaryImage.setImageData(imageData);
 206                 Image image = new ImageImpl("image-id");
 207                 InsertToken insertToken = freenetInterface.new InsertToken(image);
 208                 InsertContext insertContext = mock(InsertContext.class);
 209                 when(highLevelSimpleClient.getInsertContext(anyBoolean())).thenReturn(insertContext);
 210                 ArgumentCaptor<InsertBlock> insertBlockCaptor = forClass(InsertBlock.class);
 211                 when(highLevelSimpleClient.insert(insertBlockCaptor.capture(), eq((String) null), eq(false), eq(insertContext), eq(insertToken), anyShort())).thenThrow(InsertException.class);
 212                 freenetInterface.insertImage(temporaryImage, image, insertToken);
 213         }
 214
 215         @Test
 216         public void insertingADirectory() throws InsertException, SoneException {
 217                 FreenetURI freenetUri = mock(FreenetURI.class);
 218                 HashMap<String, Object> manifestEntries = new HashMap<String, Object>();
 219                 String defaultFile = "index.html";
 220                 FreenetURI resultingUri = mock(FreenetURI.class);
 221                 when(highLevelSimpleClient.insertManifest(eq(freenetUri), eq(manifestEntries), eq(defaultFile))).thenReturn(resultingUri);
 222                 assertThat(freenetInterface.insertDirectory(freenetUri, manifestEntries, defaultFile), is(resultingUri));
 223         }
 224
 225         @Test(expected = SoneException.class)
 226         public void insertExceptionIsForwardedAsSoneException() throws InsertException, SoneException {
 227                 when(highLevelSimpleClient.insertManifest(ArgumentMatchers.<FreenetURI>any(), ArgumentMatchers.<HashMap<String, Object>>any(), ArgumentMatchers.<String>any())).thenThrow(InsertException.class);
 228                 freenetInterface.insertDirectory(null, null, null);
 229         }
 230
 231         @Test
 232         public void soneWithWrongRequestUriWillNotBeSubscribed() throws MalformedURLException {
 233                 when(sone.getRequestUri()).thenReturn(new FreenetURI("KSK@GPLv3.txt"));
 234                 freenetInterface.registerUsk(new FreenetURI("KSK@GPLv3.txt"), null);
 235                 verify(uskManager, never()).subscribe(any(USK.class), any(USKCallback.class), anyBoolean(), any(RequestClient.class));
 236         }
 237
 238         @Test
 239         public void registeringAUsk() {
 240                 FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI().uskForSSK();
 241                 Callback callback = mock(Callback.class);
 242                 freenetInterface.registerUsk(freenetUri, callback);
 243                 verify(uskManager).subscribe(any(USK.class), any(USKCallback.class), anyBoolean(), eq((RequestClient) highLevelSimpleClient));
 244         }
 245
 246         @Test
 247         public void registeringANonUskKeyWillNotBeSubscribed() throws MalformedURLException {
 248                 FreenetURI freenetUri = new FreenetURI("KSK@GPLv3.txt");
 249                 Callback callback = mock(Callback.class);
 250                 freenetInterface.registerUsk(freenetUri, callback);
 251                 verify(uskManager, never()).subscribe(any(USK.class), any(USKCallback.class), anyBoolean(), eq((RequestClient) highLevelSimpleClient));
 252         }
 253
 254         @Test
 255         public void registeringAnActiveUskWillSubscribeToItCorrectly() {
 256                 FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI().uskForSSK();
 257                 final USKCallback uskCallback = mock(USKCallback.class);
 258                 freenetInterface.registerActiveUsk(freenetUri, uskCallback);
 259                 verify(uskManager).subscribe(any(USK.class), eq(uskCallback), eq(true), any(RequestClient.class));
 260         }
 261
 262         @Test
 263         public void registeringAnInactiveUskWillSubscribeToItCorrectly() {
 264                 FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI().uskForSSK();
 265                 final USKCallback uskCallback = mock(USKCallback.class);
 266                 freenetInterface.registerPassiveUsk(freenetUri, uskCallback);
 267                 verify(uskManager).subscribe(any(USK.class), eq(uskCallback), eq(false), any(RequestClient.class));
 268         }
 269
 270         @Test
 271         public void registeringAnActiveNonUskWillNotSubscribeToAUsk()
 272         throws MalformedURLException {
 273                 FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI();
 274                 freenetInterface.registerActiveUsk(freenetUri, null);
 275                 verify(uskManager, never()).subscribe(any(USK.class),
 276                                 any(USKCallback.class), anyBoolean(),
 277                                 eq((RequestClient) highLevelSimpleClient));
 278         }
 279
 280         @Test
 281         public void registeringAnInactiveNonUskWillNotSubscribeToAUsk()
 282         throws MalformedURLException {
 283                 FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI();
 284                 freenetInterface.registerPassiveUsk(freenetUri, null);
 285                 verify(uskManager, never()).subscribe(any(USK.class),
 286                                 any(USKCallback.class), anyBoolean(),
 287                                 eq((RequestClient) highLevelSimpleClient));
 288         }
 289
 290         @Test
 291         public void unregisteringANotRegisteredUskDoesNothing() {
 292                 FreenetURI freenetURI = createRandom(randomSource, "test-0").getURI().uskForSSK();
 293                 freenetInterface.unregisterUsk(freenetURI);
 294                 verify(uskManager, never()).unsubscribe(any(USK.class), any(USKCallback.class));
 295         }
 296
 297         @Test
 298         public void unregisteringARegisteredUsk() {
 299                 FreenetURI freenetURI = createRandom(randomSource, "test-0").getURI().uskForSSK();
 300                 Callback callback = mock(Callback.class);
 301                 freenetInterface.registerUsk(freenetURI, callback);
 302                 freenetInterface.unregisterUsk(freenetURI);
 303                 verify(uskManager).unsubscribe(any(USK.class), any(USKCallback.class));
 304         }
 305
 306         @Test
 307         public void unregisteringANotRegisteredSoneDoesNothing() {
 308                 freenetInterface.unregisterUsk(sone);
 309                 verify(uskManager, never()).unsubscribe(any(USK.class), any(USKCallback.class));
 310         }
 311
 312         @Test
 313         public void unregisteringARegisteredSoneUnregistersTheSone()
 314         throws MalformedURLException {
 315                 freenetInterface.registerActiveUsk(sone.getRequestUri(), mock(USKCallback.class));
 316                 freenetInterface.unregisterUsk(sone);
 317                 verify(uskManager).unsubscribe(any(USK.class), any(USKCallback.class));
 318         }
 319
 320         @Test
 321         public void unregisteringASoneWithAWrongRequestKeyWillNotUnsubscribe() throws MalformedURLException {
 322                 when(sone.getRequestUri()).thenReturn(new FreenetURI("KSK@GPLv3.txt"));
 323                 freenetInterface.registerUsk(sone.getRequestUri(), null);
 324                 freenetInterface.unregisterUsk(sone);
 325                 verify(uskManager, never()).unsubscribe(any(USK.class), any(USKCallback.class));
 326         }
 327
 328         @Test
 329         public void callbackForNormalUskUsesDifferentPriorities() {
 330                 Callback callback = mock(Callback.class);
 331                 FreenetURI soneUri = createRandom(randomSource, "test-0").getURI().uskForSSK();
 332                 freenetInterface.registerUsk(soneUri, callback);
 333                 assertThat(callbackCaptor.getValue().getPollingPriorityNormal(), is(PREFETCH_PRIORITY_CLASS));
 334                 assertThat(callbackCaptor.getValue().getPollingPriorityProgress(), is(INTERACTIVE_PRIORITY_CLASS));
 335         }
 336
 337         @Test
 338         public void callbackForNormalUskForwardsImportantParameters() throws MalformedURLException {
 339                 Callback callback = mock(Callback.class);
 340                 FreenetURI uri = createRandom(randomSource, "test-0").getURI().uskForSSK();
 341                 freenetInterface.registerUsk(uri, callback);
 342                 USK key = mock(USK.class);
 343                 when(key.getURI()).thenReturn(uri);
 344                 callbackCaptor.getValue().onFoundEdition(3, key, null, false, (short) 0, null, true, true);
 345                 verify(callback).editionFound(eq(uri), eq(3L), eq(true), eq(true));
 346         }
 347
 348         @Test
 349         public void fetchedRetainsUriAndFetchResult() {
 350                 FreenetURI freenetUri = mock(FreenetURI.class);
 351                 FetchResult fetchResult = mock(FetchResult.class);
 352                 Fetched fetched = new Fetched(freenetUri, fetchResult);
 353                 assertThat(fetched.getFreenetUri(), is(freenetUri));
 354                 assertThat(fetched.getFetchResult(), is(fetchResult));
 355         }
 356
 357         @Test
 358         public void cancellingAnInsertWillFireImageInsertAbortedEvent() {
 359                 ClientPutter clientPutter = mock(ClientPutter.class);
 360                 insertToken.setClientPutter(clientPutter);
 361                 ArgumentCaptor<ImageInsertStartedEvent> imageInsertStartedEvent = forClass(ImageInsertStartedEvent.class);
 362                 verify(eventBus).post(imageInsertStartedEvent.capture());
 363                 assertThat(imageInsertStartedEvent.getValue().image(), is(image));
 364                 insertToken.cancel();
 365                 ArgumentCaptor<ImageInsertAbortedEvent> imageInsertAbortedEvent = forClass(ImageInsertAbortedEvent.class);
 366                 verify(eventBus, times(2)).post(imageInsertAbortedEvent.capture());
 367                 verify(bucket).free();
 368                 assertThat(imageInsertAbortedEvent.getValue().image(), is(image));
 369         }
 370
 371         @Test
 372         public void failureWithoutExceptionSendsFailedEvent() {
 373                 insertToken.onFailure(null, null);
 374                 ArgumentCaptor<ImageInsertFailedEvent> imageInsertFailedEvent = forClass(ImageInsertFailedEvent.class);
 375                 verify(eventBus).post(imageInsertFailedEvent.capture());
 376                 verify(bucket).free();
 377                 assertThat(imageInsertFailedEvent.getValue().image(), is(image));
 378                 assertThat(imageInsertFailedEvent.getValue().cause(), nullValue());
 379         }
 380
 381         @Test
 382         public void failureSendsFailedEventWithException() {
 383                 InsertException insertException = new InsertException(InsertExceptionMode.INTERNAL_ERROR, "Internal error", null);
 384                 insertToken.onFailure(insertException, null);
 385                 ArgumentCaptor<ImageInsertFailedEvent> imageInsertFailedEvent = forClass(ImageInsertFailedEvent.class);
 386                 verify(eventBus).post(imageInsertFailedEvent.capture());
 387                 verify(bucket).free();
 388                 assertThat(imageInsertFailedEvent.getValue().image(), is(image));
 389                 assertThat(imageInsertFailedEvent.getValue().cause(), is((Throwable) insertException));
 390         }
 391
 392         @Test
 393         public void failureBecauseCancelledByUserSendsAbortedEvent() {
 394                 InsertException insertException = new InsertException(InsertExceptionMode.CANCELLED, null);
 395                 insertToken.onFailure(insertException, null);
 396                 ArgumentCaptor<ImageInsertAbortedEvent> imageInsertAbortedEvent = forClass(ImageInsertAbortedEvent.class);
 397                 verify(eventBus).post(imageInsertAbortedEvent.capture());
 398                 verify(bucket).free();
 399                 assertThat(imageInsertAbortedEvent.getValue().image(), is(image));
 400         }
 401
 402         @Test
 403         public void ignoredMethodsDoNotThrowExceptions() throws ResumeFailedException {
 404                 insertToken.onResume(null);
 405                 insertToken.onFetchable(null);
 406                 insertToken.onGeneratedMetadata(null, null);
 407         }
 408
 409         @Test
 410         public void generatedUriIsPostedOnSuccess() {
 411                 FreenetURI generatedUri = mock(FreenetURI.class);
 412                 insertToken.onGeneratedURI(generatedUri, null);
 413                 insertToken.onSuccess(null);
 414                 ArgumentCaptor<ImageInsertFinishedEvent> imageInsertFinishedEvent = forClass(ImageInsertFinishedEvent.class);
 415                 verify(eventBus).post(imageInsertFinishedEvent.capture());
 416                 verify(bucket).free();
 417                 assertThat(imageInsertFinishedEvent.getValue().image(), is(image));
 418                 assertThat(imageInsertFinishedEvent.getValue().resultingUri(), is(generatedUri));
 419         }
 420
 421         @Test
 422         public void insertTokenSupplierSuppliesInsertTokens() {
 423                 InsertTokenSupplier insertTokenSupplier = freenetInterface.new InsertTokenSupplier();
 424                 assertThat(insertTokenSupplier.apply(image), notNullValue());
 425         }
 426
 427         @Test
 428         public void backgroundFetchCanBeStarted() throws Exception {
 429                 freenetInterface.startFetch(uri, backgroundFetchCallback);
 430                 verify(highLevelSimpleClient).fetch(eq(uri), anyLong(), any(ClientGetCallback.class), any(FetchContext.class), anyShort());
 431         }
 432
 433         @Test
 434         public void backgroundFetchRegistersSnoopAndRestartsTheRequest() throws Exception {
 435                 freenetInterface.startFetch(uri, backgroundFetchCallback);
 436                 verify(clientGetter).setMetaSnoop(any(SnoopMetadata.class));
 437                 verify(clientGetter).restart(eq(uri), anyBoolean(), any(ClientContext.class));
 438         }
 439
 440         @Test
 441         public void requestIsNotCancelledForImageMimeType() {
 442                 verifySnoopCancelsRequestForMimeType("image/png", false);
 443                 verify(backgroundFetchCallback, never()).failed(uri);
 444         }
 445
 446         @Test
 447         public void requestIsCancelledForNullMimeType() {
 448                 verifySnoopCancelsRequestForMimeType(null, true);
 449                 verify(backgroundFetchCallback, never()).shouldCancel(eq(uri), ArgumentMatchers.<String>any(), anyLong());
 450                 verify(backgroundFetchCallback).failed(uri);
 451         }
 452
 453         @Test
 454         public void requestIsCancelledForVideoMimeType() {
 455                 verifySnoopCancelsRequestForMimeType("video/mkv", true);
 456                 verify(backgroundFetchCallback).failed(uri);
 457         }
 458
 459         @Test
 460         public void requestIsCancelledForAudioMimeType() {
 461                 verifySnoopCancelsRequestForMimeType("audio/mpeg", true);
 462                 verify(backgroundFetchCallback).failed(uri);
 463         }
 464
 465         @Test
 466         public void requestIsCancelledForTextMimeType() {
 467                 verifySnoopCancelsRequestForMimeType("text/plain", true);
 468                 verify(backgroundFetchCallback).failed(uri);
 469         }
 470
 471         private void verifySnoopCancelsRequestForMimeType(String mimeType, boolean cancel) {
 472                 when(backgroundFetchCallback.shouldCancel(eq(uri), eq(mimeType), anyLong())).thenReturn(cancel);
 473                 freenetInterface.startFetch(uri, backgroundFetchCallback);
 474                 ArgumentCaptor<SnoopMetadata> snoopMetadata = forClass(SnoopMetadata.class);
 475                 verify(clientGetter).setMetaSnoop(snoopMetadata.capture());
 476                 Metadata metadata = mock(Metadata.class);
 477                 when(metadata.getMIMEType()).thenReturn(mimeType);
 478                 assertThat(snoopMetadata.getValue().snoopMetadata(metadata, mock(ClientContext.class)), is(cancel));
 479         }
 480
 481         @Test
 482         public void callbackOfBackgroundFetchIsNotifiedOnSuccess() throws Exception {
 483                 freenetInterface.startFetch(uri, backgroundFetchCallback);
 484                 verify(highLevelSimpleClient).fetch(eq(uri), anyLong(), clientGetCallback.capture(), any(FetchContext.class), anyShort());
 485                 when(fetchResult.getMimeType()).thenReturn("image/png");
 486                 when(fetchResult.asByteArray()).thenReturn(new byte[] { 1, 2, 3, 4, 5 });
 487                 clientGetCallback.getValue().onSuccess(fetchResult, mock(ClientGetter.class));
 488                 verify(backgroundFetchCallback).loaded(uri, "image/png", new byte[] { 1, 2, 3, 4, 5 });
 489                 verifyNoMoreInteractions(backgroundFetchCallback);
 490         }
 491
 492         @Test
 493         public void callbackOfBackgroundFetchIsNotifiedOnFailure() throws Exception {
 494                 freenetInterface.startFetch(uri, backgroundFetchCallback);
 495                 verify(highLevelSimpleClient).fetch(eq(uri), anyLong(), clientGetCallback.capture(), any(FetchContext.class), anyShort());
 496                 when(fetchResult.getMimeType()).thenReturn("image/png");
 497                 when(fetchResult.asByteArray()).thenReturn(new byte[] { 1, 2, 3, 4, 5 });
 498                 clientGetCallback.getValue().onFailure(new FetchException(ALL_DATA_NOT_FOUND), mock(ClientGetter.class));
 499                 verify(backgroundFetchCallback).failed(uri);
 500                 verifyNoMoreInteractions(backgroundFetchCallback);
 501         }
 502
 503         @Test
 504         public void callbackOfBackgroundFetchIsNotifiedAsFailureIfBucketCanNotBeLoaded() throws Exception {
 505                 freenetInterface.startFetch(uri, backgroundFetchCallback);
 506                 verify(highLevelSimpleClient).fetch(eq(uri), anyLong(), clientGetCallback.capture(), any(FetchContext.class), anyShort());
 507                 when(fetchResult.getMimeType()).thenReturn("image/png");
 508                 when(fetchResult.asByteArray()).thenThrow(IOException.class);
 509                 clientGetCallback.getValue().onSuccess(fetchResult, mock(ClientGetter.class));
 510                 verify(backgroundFetchCallback).failed(uri);
 511                 verifyNoMoreInteractions(backgroundFetchCallback);
 512         }
 513
 514 }