Move Fetched class to top-level
[Sone.git] / src / test / java / net / pterodactylus / sone / core / FreenetInterfaceTest.java
index 5abf2c1..812d41f 100644 (file)
@@ -1,48 +1,64 @@
 package net.pterodactylus.sone.core;
 
+import static freenet.client.FetchException.FetchExceptionMode.ALL_DATA_NOT_FOUND;
 import static freenet.keys.InsertableClientSSK.createRandom;
-import static java.lang.System.currentTimeMillis;
-import static java.util.concurrent.TimeUnit.DAYS;
-import static net.pterodactylus.sone.Matchers.delivers;
+import static freenet.node.RequestStarter.INTERACTIVE_PRIORITY_CLASS;
+import static freenet.node.RequestStarter.PREFETCH_PRIORITY_CLASS;
+import static net.pterodactylus.sone.test.Matchers.delivers;
+import static net.pterodactylus.sone.test.TestUtil.setFinalField;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.is;
 import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
 import static org.mockito.ArgumentCaptor.forClass;
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.anyBoolean;
-import static org.mockito.Matchers.anyShort;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.ArgumentMatchers.anyShort;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.Mockito.when;
 import static org.mockito.Mockito.withSettings;
 
 import java.io.IOException;
-import java.lang.reflect.Field;
-import java.lang.reflect.Modifier;
 import java.net.MalformedURLException;
 import java.util.HashMap;
 
+import net.pterodactylus.sone.core.FreenetInterface.BackgroundFetchCallback;
 import net.pterodactylus.sone.core.FreenetInterface.Callback;
-import net.pterodactylus.sone.core.FreenetInterface.Fetched;
 import net.pterodactylus.sone.core.FreenetInterface.InsertToken;
+import net.pterodactylus.sone.core.FreenetInterface.InsertTokenSupplier;
+import net.pterodactylus.sone.core.event.ImageInsertAbortedEvent;
+import net.pterodactylus.sone.core.event.ImageInsertFailedEvent;
+import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
 import net.pterodactylus.sone.core.event.ImageInsertStartedEvent;
 import net.pterodactylus.sone.data.Image;
-import net.pterodactylus.sone.data.ImageImpl;
 import net.pterodactylus.sone.data.Sone;
 import net.pterodactylus.sone.data.TemporaryImage;
-import net.pterodactylus.sone.freenet.StringBucket;
+import net.pterodactylus.sone.data.impl.ImageImpl;
+import net.pterodactylus.sone.test.TestUtil;
 
 import freenet.client.ClientMetadata;
+import freenet.client.FetchContext;
 import freenet.client.FetchException;
+import freenet.client.FetchException.FetchExceptionMode;
 import freenet.client.FetchResult;
 import freenet.client.HighLevelSimpleClient;
 import freenet.client.InsertBlock;
 import freenet.client.InsertContext;
 import freenet.client.InsertException;
+import freenet.client.InsertException.InsertExceptionMode;
+import freenet.client.Metadata;
+import freenet.client.async.ClientContext;
+import freenet.client.async.ClientGetCallback;
+import freenet.client.async.ClientGetter;
 import freenet.client.async.ClientPutter;
+import freenet.client.async.SnoopMetadata;
 import freenet.client.async.USKCallback;
 import freenet.client.async.USKManager;
 import freenet.crypt.DummyRandomSource;
@@ -55,11 +71,14 @@ import freenet.node.NodeClientCore;
 import freenet.node.RequestClient;
 import freenet.support.Base64;
 import freenet.support.api.Bucket;
+import freenet.support.io.ArrayBucket;
+import freenet.support.io.ResumeFailedException;
 
 import com.google.common.eventbus.EventBus;
 import org.junit.Before;
 import org.junit.Test;
 import org.mockito.ArgumentCaptor;
+import org.mockito.ArgumentMatchers;
 
 /**
  * Unit test for {@link FreenetInterface}.
@@ -76,6 +95,24 @@ public class FreenetInterfaceTest {
        private final USKManager uskManager = mock(USKManager.class);
        private FreenetInterface freenetInterface;
        private final Sone sone = mock(Sone.class);
+       private final ArgumentCaptor<USKCallback> callbackCaptor = forClass(USKCallback.class);
+       private final Image image = mock(Image.class);
+       private InsertToken insertToken;
+       private final Bucket bucket = mock(Bucket.class);
+       private final ArgumentCaptor<ClientGetCallback> clientGetCallback = forClass(ClientGetCallback.class);
+       private final FreenetURI uri = new FreenetURI("KSK@pgl.png");
+       private final FetchResult fetchResult = mock(FetchResult.class);
+       private final BackgroundFetchCallback backgroundFetchCallback = mock(BackgroundFetchCallback.class);
+       private final ClientGetter clientGetter = mock(ClientGetter.class);
+
+       public FreenetInterfaceTest() throws MalformedURLException {
+       }
+
+       @Before
+       public void setupHighLevelSimpleClient() throws Exception {
+               when(highLevelSimpleClient.getFetchContext()).thenReturn(mock(FetchContext.class));
+               when(highLevelSimpleClient.fetch(eq(uri), anyLong(), any(ClientGetCallback.class), any(FetchContext.class), anyShort())).thenReturn( clientGetter);
+       }
 
        @Before
        public void setupFreenetInterface() {
@@ -83,7 +120,10 @@ public class FreenetInterfaceTest {
                setFinalField(node, "clientCore", nodeClientCore);
                setFinalField(node, "random", randomSource);
                setFinalField(nodeClientCore, "uskManager", uskManager);
+               setFinalField(nodeClientCore, "clientContext", mock(ClientContext.class));
                freenetInterface = new FreenetInterface(eventBus, node);
+               insertToken = freenetInterface.new InsertToken(image);
+               insertToken.setBucket(bucket);
        }
 
        @Before
@@ -93,6 +133,11 @@ public class FreenetInterfaceTest {
                when(sone.getRequestUri()).thenReturn(insertSsk.getURI().uskForSSK());
        }
 
+       @Before
+       public void setupCallbackCaptorAndUskManager() {
+               doNothing().when(uskManager).subscribe(any(USK.class), callbackCaptor.capture(), anyBoolean(), any(RequestClient.class));
+       }
+
        @Test
        public void canFetchUri() throws MalformedURLException, FetchException {
                FreenetURI freenetUri = new FreenetURI("KSK@GPLv3.txt");
@@ -109,7 +154,7 @@ public class FreenetInterfaceTest {
                FreenetURI freenetUri = new FreenetURI("KSK@GPLv2.txt");
                FreenetURI newFreenetUri = new FreenetURI("KSK@GPLv3.txt");
                FetchResult fetchResult = createFetchResult();
-               FetchException fetchException = new FetchException(FetchException.PERMANENT_REDIRECT, newFreenetUri);
+               FetchException fetchException = new FetchException(FetchExceptionMode.PERMANENT_REDIRECT, newFreenetUri);
                when(highLevelSimpleClient.fetch(freenetUri)).thenThrow(fetchException);
                when(highLevelSimpleClient.fetch(newFreenetUri)).thenReturn(fetchResult);
                Fetched fetched = freenetInterface.fetchUri(freenetUri);
@@ -120,7 +165,7 @@ public class FreenetInterfaceTest {
        @Test
        public void fetchReturnsNullOnFetchExceptions() throws MalformedURLException, FetchException {
                FreenetURI freenetUri = new FreenetURI("KSK@GPLv2.txt");
-               FetchException fetchException = new FetchException(FetchException.ALL_DATA_NOT_FOUND);
+               FetchException fetchException = new FetchException(ALL_DATA_NOT_FOUND);
                when(highLevelSimpleClient.fetch(freenetUri)).thenThrow(fetchException);
                Fetched fetched = freenetInterface.fetchUri(freenetUri);
                assertThat(fetched, nullValue());
@@ -128,25 +173,10 @@ public class FreenetInterfaceTest {
 
        private FetchResult createFetchResult() {
                ClientMetadata clientMetadata = new ClientMetadata("text/plain");
-               Bucket bucket = new StringBucket("Some Data.");
+               Bucket bucket = new ArrayBucket("Some Data.".getBytes());
                return new FetchResult(clientMetadata, bucket);
        }
 
-       private void setFinalField(Object object, String fieldName, Object value) {
-               try {
-                       Field clientCoreField = object.getClass().getField(fieldName);
-                       clientCoreField.setAccessible(true);
-                       Field modifiersField = Field.class.getDeclaredField("modifiers");
-                       modifiersField.setAccessible(true);
-                       modifiersField.setInt(clientCoreField, clientCoreField.getModifiers() & ~Modifier.FINAL);
-                       clientCoreField.set(object, value);
-               } catch (NoSuchFieldException e) {
-                       throw new RuntimeException(e);
-               } catch (IllegalAccessException e) {
-                       throw new RuntimeException(e);
-               }
-       }
-
        @Test
        public void insertingAnImage() throws SoneException, InsertException, IOException {
                TemporaryImage temporaryImage = new TemporaryImage("image-id");
@@ -159,25 +189,13 @@ public class FreenetInterfaceTest {
                when(highLevelSimpleClient.getInsertContext(anyBoolean())).thenReturn(insertContext);
                ClientPutter clientPutter = mock(ClientPutter.class);
                ArgumentCaptor<InsertBlock> insertBlockCaptor = forClass(InsertBlock.class);
-               when(highLevelSimpleClient.insert(insertBlockCaptor.capture(), eq(false), eq((String) null), eq(false), eq(insertContext), eq(insertToken), anyShort())).thenReturn(clientPutter);
+               when(highLevelSimpleClient.insert(insertBlockCaptor.capture(), eq((String) null), eq(false), eq(insertContext), eq(insertToken), anyShort())).thenReturn(clientPutter);
                freenetInterface.insertImage(temporaryImage, image, insertToken);
                assertThat(insertBlockCaptor.getValue().getData().getInputStream(), delivers(new byte[] { 1, 2, 3, 4 }));
-               assertThat(this.<ClientPutter>getPrivateField(insertToken, "clientPutter"), is(clientPutter));
+               assertThat(TestUtil.<ClientPutter>getPrivateField(insertToken, "clientPutter"), is(clientPutter));
                verify(eventBus).post(any(ImageInsertStartedEvent.class));
        }
 
-       private <T> T getPrivateField(Object object, String fieldName) {
-               try {
-                       Field field = object.getClass().getDeclaredField(fieldName);
-                       field.setAccessible(true);
-                       return (T) field.get(object);
-               } catch (NoSuchFieldException e) {
-                       throw new RuntimeException(e);
-               } catch (IllegalAccessException e) {
-                       throw new RuntimeException(e);
-               }
-       }
-
        @Test(expected = SoneInsertException.class)
        public void insertExceptionCausesASoneException() throws InsertException, SoneException, IOException {
                TemporaryImage temporaryImage = new TemporaryImage("image-id");
@@ -189,7 +207,7 @@ public class FreenetInterfaceTest {
                InsertContext insertContext = mock(InsertContext.class);
                when(highLevelSimpleClient.getInsertContext(anyBoolean())).thenReturn(insertContext);
                ArgumentCaptor<InsertBlock> insertBlockCaptor = forClass(InsertBlock.class);
-               when(highLevelSimpleClient.insert(insertBlockCaptor.capture(), eq(false), eq((String) null), eq(false), eq(insertContext), eq(insertToken), anyShort())).thenThrow(InsertException.class);
+               when(highLevelSimpleClient.insert(insertBlockCaptor.capture(), eq((String) null), eq(false), eq(insertContext), eq(insertToken), anyShort())).thenThrow(InsertException.class);
                freenetInterface.insertImage(temporaryImage, image, insertToken);
        }
 
@@ -205,32 +223,18 @@ public class FreenetInterfaceTest {
 
        @Test(expected = SoneException.class)
        public void insertExceptionIsForwardedAsSoneException() throws InsertException, SoneException {
-               when(highLevelSimpleClient.insertManifest(any(FreenetURI.class), any(HashMap.class), any(String.class))).thenThrow(InsertException.class);
+               when(highLevelSimpleClient.insertManifest(ArgumentMatchers.<FreenetURI>any(), ArgumentMatchers.<HashMap<String, Object>>any(), ArgumentMatchers.<String>any())).thenThrow(InsertException.class);
                freenetInterface.insertDirectory(null, null, null);
        }
 
        @Test
        public void soneWithWrongRequestUriWillNotBeSubscribed() throws MalformedURLException {
                when(sone.getRequestUri()).thenReturn(new FreenetURI("KSK@GPLv3.txt"));
-               freenetInterface.registerUsk(sone, null);
+               freenetInterface.registerUsk(new FreenetURI("KSK@GPLv3.txt"), null);
                verify(uskManager, never()).subscribe(any(USK.class), any(USKCallback.class), anyBoolean(), any(RequestClient.class));
        }
 
        @Test
-       public void registeringAUskForARecentlyModifiedSone() throws MalformedURLException {
-               when(sone.getTime()).thenReturn(currentTimeMillis() - DAYS.toMillis(1));
-               freenetInterface.registerUsk(sone, null);
-               verify(uskManager).subscribe(any(USK.class), any(USKCallback.class), eq(true), eq((RequestClient) highLevelSimpleClient));
-       }
-
-       @Test
-       public void registeringAUskForAnOldSone() throws MalformedURLException {
-               when(sone.getTime()).thenReturn(currentTimeMillis() - DAYS.toMillis(365));
-               freenetInterface.registerUsk(sone, null);
-               verify(uskManager).subscribe(any(USK.class), any(USKCallback.class), eq(false), eq((RequestClient) highLevelSimpleClient));
-       }
-
-       @Test
        public void registeringAUsk() {
                FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI().uskForSSK();
                Callback callback = mock(Callback.class);
@@ -247,6 +251,42 @@ public class FreenetInterfaceTest {
        }
 
        @Test
+       public void registeringAnActiveUskWillSubscribeToItCorrectly() {
+               FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI().uskForSSK();
+               final USKCallback uskCallback = mock(USKCallback.class);
+               freenetInterface.registerActiveUsk(freenetUri, uskCallback);
+               verify(uskManager).subscribe(any(USK.class), eq(uskCallback), eq(true), any(RequestClient.class));
+       }
+
+       @Test
+       public void registeringAnInactiveUskWillSubscribeToItCorrectly() {
+               FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI().uskForSSK();
+               final USKCallback uskCallback = mock(USKCallback.class);
+               freenetInterface.registerPassiveUsk(freenetUri, uskCallback);
+               verify(uskManager).subscribe(any(USK.class), eq(uskCallback), eq(false), any(RequestClient.class));
+       }
+
+       @Test
+       public void registeringAnActiveNonUskWillNotSubscribeToAUsk()
+       throws MalformedURLException {
+               FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI();
+               freenetInterface.registerActiveUsk(freenetUri, null);
+               verify(uskManager, never()).subscribe(any(USK.class),
+                               any(USKCallback.class), anyBoolean(),
+                               eq((RequestClient) highLevelSimpleClient));
+       }
+
+       @Test
+       public void registeringAnInactiveNonUskWillNotSubscribeToAUsk()
+       throws MalformedURLException {
+               FreenetURI freenetUri = createRandom(randomSource, "test-0").getURI();
+               freenetInterface.registerPassiveUsk(freenetUri, null);
+               verify(uskManager, never()).subscribe(any(USK.class),
+                               any(USKCallback.class), anyBoolean(),
+                               eq((RequestClient) highLevelSimpleClient));
+       }
+
+       @Test
        public void unregisteringANotRegisteredUskDoesNothing() {
                FreenetURI freenetURI = createRandom(randomSource, "test-0").getURI().uskForSSK();
                freenetInterface.unregisterUsk(freenetURI);
@@ -269,21 +309,42 @@ public class FreenetInterfaceTest {
        }
 
        @Test
-       public void unregisteringARegisteredSoneUnregistersTheSone() {
-               freenetInterface.registerUsk(sone, null);
+       public void unregisteringARegisteredSoneUnregistersTheSone()
+       throws MalformedURLException {
+               freenetInterface.registerActiveUsk(sone.getRequestUri(), mock(USKCallback.class));
                freenetInterface.unregisterUsk(sone);
                verify(uskManager).unsubscribe(any(USK.class), any(USKCallback.class));
        }
 
        @Test
        public void unregisteringASoneWithAWrongRequestKeyWillNotUnsubscribe() throws MalformedURLException {
-               freenetInterface.registerUsk(sone, null);
                when(sone.getRequestUri()).thenReturn(new FreenetURI("KSK@GPLv3.txt"));
+               freenetInterface.registerUsk(sone.getRequestUri(), null);
                freenetInterface.unregisterUsk(sone);
                verify(uskManager, never()).unsubscribe(any(USK.class), any(USKCallback.class));
        }
 
        @Test
+       public void callbackForNormalUskUsesDifferentPriorities() {
+               Callback callback = mock(Callback.class);
+               FreenetURI soneUri = createRandom(randomSource, "test-0").getURI().uskForSSK();
+               freenetInterface.registerUsk(soneUri, callback);
+               assertThat(callbackCaptor.getValue().getPollingPriorityNormal(), is(PREFETCH_PRIORITY_CLASS));
+               assertThat(callbackCaptor.getValue().getPollingPriorityProgress(), is(INTERACTIVE_PRIORITY_CLASS));
+       }
+
+       @Test
+       public void callbackForNormalUskForwardsImportantParameters() throws MalformedURLException {
+               Callback callback = mock(Callback.class);
+               FreenetURI uri = createRandom(randomSource, "test-0").getURI().uskForSSK();
+               freenetInterface.registerUsk(uri, callback);
+               USK key = mock(USK.class);
+               when(key.getURI()).thenReturn(uri);
+               callbackCaptor.getValue().onFoundEdition(3, key, null, false, (short) 0, null, true, true);
+               verify(callback).editionFound(eq(uri), eq(3L), eq(true), eq(true));
+       }
+
+       @Test
        public void fetchedRetainsUriAndFetchResult() {
                FreenetURI freenetUri = mock(FreenetURI.class);
                FetchResult fetchResult = mock(FetchResult.class);
@@ -292,4 +353,161 @@ public class FreenetInterfaceTest {
                assertThat(fetched.getFetchResult(), is(fetchResult));
        }
 
+       @Test
+       public void cancellingAnInsertWillFireImageInsertAbortedEvent() {
+               ClientPutter clientPutter = mock(ClientPutter.class);
+               insertToken.setClientPutter(clientPutter);
+               ArgumentCaptor<ImageInsertStartedEvent> imageInsertStartedEvent = forClass(ImageInsertStartedEvent.class);
+               verify(eventBus).post(imageInsertStartedEvent.capture());
+               assertThat(imageInsertStartedEvent.getValue().image(), is(image));
+               insertToken.cancel();
+               ArgumentCaptor<ImageInsertAbortedEvent> imageInsertAbortedEvent = forClass(ImageInsertAbortedEvent.class);
+               verify(eventBus, times(2)).post(imageInsertAbortedEvent.capture());
+               verify(bucket).free();
+               assertThat(imageInsertAbortedEvent.getValue().image(), is(image));
+       }
+
+       @Test
+       public void failureWithoutExceptionSendsFailedEvent() {
+               insertToken.onFailure(null, null);
+               ArgumentCaptor<ImageInsertFailedEvent> imageInsertFailedEvent = forClass(ImageInsertFailedEvent.class);
+               verify(eventBus).post(imageInsertFailedEvent.capture());
+               verify(bucket).free();
+               assertThat(imageInsertFailedEvent.getValue().image(), is(image));
+               assertThat(imageInsertFailedEvent.getValue().cause(), nullValue());
+       }
+
+       @Test
+       public void failureSendsFailedEventWithException() {
+               InsertException insertException = new InsertException(InsertExceptionMode.INTERNAL_ERROR, "Internal error", null);
+               insertToken.onFailure(insertException, null);
+               ArgumentCaptor<ImageInsertFailedEvent> imageInsertFailedEvent = forClass(ImageInsertFailedEvent.class);
+               verify(eventBus).post(imageInsertFailedEvent.capture());
+               verify(bucket).free();
+               assertThat(imageInsertFailedEvent.getValue().image(), is(image));
+               assertThat(imageInsertFailedEvent.getValue().cause(), is((Throwable) insertException));
+       }
+
+       @Test
+       public void failureBecauseCancelledByUserSendsAbortedEvent() {
+               InsertException insertException = new InsertException(InsertExceptionMode.CANCELLED, null);
+               insertToken.onFailure(insertException, null);
+               ArgumentCaptor<ImageInsertAbortedEvent> imageInsertAbortedEvent = forClass(ImageInsertAbortedEvent.class);
+               verify(eventBus).post(imageInsertAbortedEvent.capture());
+               verify(bucket).free();
+               assertThat(imageInsertAbortedEvent.getValue().image(), is(image));
+       }
+
+       @Test
+       public void ignoredMethodsDoNotThrowExceptions() throws ResumeFailedException {
+               insertToken.onResume(null);
+               insertToken.onFetchable(null);
+               insertToken.onGeneratedMetadata(null, null);
+       }
+
+       @Test
+       public void generatedUriIsPostedOnSuccess() {
+               FreenetURI generatedUri = mock(FreenetURI.class);
+               insertToken.onGeneratedURI(generatedUri, null);
+               insertToken.onSuccess(null);
+               ArgumentCaptor<ImageInsertFinishedEvent> imageInsertFinishedEvent = forClass(ImageInsertFinishedEvent.class);
+               verify(eventBus).post(imageInsertFinishedEvent.capture());
+               verify(bucket).free();
+               assertThat(imageInsertFinishedEvent.getValue().image(), is(image));
+               assertThat(imageInsertFinishedEvent.getValue().resultingUri(), is(generatedUri));
+       }
+
+       @Test
+       public void insertTokenSupplierSuppliesInsertTokens() {
+               InsertTokenSupplier insertTokenSupplier = new InsertTokenSupplier(freenetInterface);
+               assertThat(insertTokenSupplier.apply(image), notNullValue());
+       }
+
+       @Test
+       public void backgroundFetchCanBeStarted() throws Exception {
+               freenetInterface.startFetch(uri, backgroundFetchCallback);
+               verify(highLevelSimpleClient).fetch(eq(uri), anyLong(), any(ClientGetCallback.class), any(FetchContext.class), anyShort());
+       }
+
+       @Test
+       public void backgroundFetchRegistersSnoopAndRestartsTheRequest() throws Exception {
+               freenetInterface.startFetch(uri, backgroundFetchCallback);
+               verify(clientGetter).setMetaSnoop(any(SnoopMetadata.class));
+               verify(clientGetter).restart(eq(uri), anyBoolean(), any(ClientContext.class));
+       }
+
+       @Test
+       public void requestIsNotCancelledForImageMimeType() {
+               verifySnoopCancelsRequestForMimeType("image/png", false);
+               verify(backgroundFetchCallback, never()).failed(uri);
+       }
+
+       @Test
+       public void requestIsCancelledForNullMimeType() {
+               verifySnoopCancelsRequestForMimeType(null, true);
+               verify(backgroundFetchCallback, never()).shouldCancel(eq(uri), ArgumentMatchers.<String>any(), anyLong());
+               verify(backgroundFetchCallback).failed(uri);
+       }
+
+       @Test
+       public void requestIsCancelledForVideoMimeType() {
+               verifySnoopCancelsRequestForMimeType("video/mkv", true);
+               verify(backgroundFetchCallback).failed(uri);
+       }
+
+       @Test
+       public void requestIsCancelledForAudioMimeType() {
+               verifySnoopCancelsRequestForMimeType("audio/mpeg", true);
+               verify(backgroundFetchCallback).failed(uri);
+       }
+
+       @Test
+       public void requestIsCancelledForTextMimeType() {
+               verifySnoopCancelsRequestForMimeType("text/plain", true);
+               verify(backgroundFetchCallback).failed(uri);
+       }
+
+       private void verifySnoopCancelsRequestForMimeType(String mimeType, boolean cancel) {
+               when(backgroundFetchCallback.shouldCancel(eq(uri), eq(mimeType), anyLong())).thenReturn(cancel);
+               freenetInterface.startFetch(uri, backgroundFetchCallback);
+               ArgumentCaptor<SnoopMetadata> snoopMetadata = forClass(SnoopMetadata.class);
+               verify(clientGetter).setMetaSnoop(snoopMetadata.capture());
+               Metadata metadata = mock(Metadata.class);
+               when(metadata.getMIMEType()).thenReturn(mimeType);
+               assertThat(snoopMetadata.getValue().snoopMetadata(metadata, mock(ClientContext.class)), is(cancel));
+       }
+
+       @Test
+       public void callbackOfBackgroundFetchIsNotifiedOnSuccess() throws Exception {
+               freenetInterface.startFetch(uri, backgroundFetchCallback);
+               verify(highLevelSimpleClient).fetch(eq(uri), anyLong(), clientGetCallback.capture(), any(FetchContext.class), anyShort());
+               when(fetchResult.getMimeType()).thenReturn("image/png");
+               when(fetchResult.asByteArray()).thenReturn(new byte[] { 1, 2, 3, 4, 5 });
+               clientGetCallback.getValue().onSuccess(fetchResult, mock(ClientGetter.class));
+               verify(backgroundFetchCallback).loaded(uri, "image/png", new byte[] { 1, 2, 3, 4, 5 });
+               verifyNoMoreInteractions(backgroundFetchCallback);
+       }
+
+       @Test
+       public void callbackOfBackgroundFetchIsNotifiedOnFailure() throws Exception {
+               freenetInterface.startFetch(uri, backgroundFetchCallback);
+               verify(highLevelSimpleClient).fetch(eq(uri), anyLong(), clientGetCallback.capture(), any(FetchContext.class), anyShort());
+               when(fetchResult.getMimeType()).thenReturn("image/png");
+               when(fetchResult.asByteArray()).thenReturn(new byte[] { 1, 2, 3, 4, 5 });
+               clientGetCallback.getValue().onFailure(new FetchException(ALL_DATA_NOT_FOUND), mock(ClientGetter.class));
+               verify(backgroundFetchCallback).failed(uri);
+               verifyNoMoreInteractions(backgroundFetchCallback);
+       }
+
+       @Test
+       public void callbackOfBackgroundFetchIsNotifiedAsFailureIfBucketCanNotBeLoaded() throws Exception {
+               freenetInterface.startFetch(uri, backgroundFetchCallback);
+               verify(highLevelSimpleClient).fetch(eq(uri), anyLong(), clientGetCallback.capture(), any(FetchContext.class), anyShort());
+               when(fetchResult.getMimeType()).thenReturn("image/png");
+               when(fetchResult.asByteArray()).thenThrow(IOException.class);
+               clientGetCallback.getValue().onSuccess(fetchResult, mock(ClientGetter.class));
+               verify(backgroundFetchCallback).failed(uri);
+               verifyNoMoreInteractions(backgroundFetchCallback);
+       }
+
 }