Add sone change detector that finds new and removed elements.

[Sone.git] / src / test / java / net / pterodactylus / sone / core / SoneChangeDetectorTest.java

diff --git a/src/test/java/net/pterodactylus/sone/core/SoneChangeDetectorTest.java b/src/test/java/net/pterodactylus/sone/core/SoneChangeDetectorTest.java
new file mode 100644 (file)
index 0000000..f070eff
--- /dev/null
+++ b/src/test/java/net/pterodactylus/sone/core/SoneChangeDetectorTest.java
@@ -0,0 +1,108 @@
+package net.pterodactylus.sone.core;
+
+import static java.util.Arrays.asList;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.util.HashSet;
+
+import net.pterodactylus.sone.core.SoneChangeDetector.PostProcessor;
+import net.pterodactylus.sone.core.SoneChangeDetector.PostReplyProcessor;
+import net.pterodactylus.sone.data.Post;
+import net.pterodactylus.sone.data.PostReply;
+import net.pterodactylus.sone.data.Sone;
+
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Unit test for {@link SoneChangeDetector}.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class SoneChangeDetectorTest {
+
+       private final Sone oldSone = mock(Sone.class);
+       private final Sone newSone = mock(Sone.class);
+       private final SoneChangeDetector soneChangeDetector =
+                       new SoneChangeDetector(oldSone);
+       private final Post oldPost = mock(Post.class);
+       private final Post removedPost = mock(Post.class);
+       private final Post newPost = mock(Post.class);
+       private final PostProcessor newPostProcessor = mock(PostProcessor.class);
+       private final PostProcessor removedPostProcessor =
+                       mock(PostProcessor.class);
+       private final PostReply oldPostReply = mock(PostReply.class);
+       private final PostReply removedPostReply = mock(PostReply.class);
+       private final PostReply newPostReply = mock(PostReply.class);
+       private final PostReplyProcessor newPostReplyProcessor =
+                       mock(PostReplyProcessor.class);
+       private final PostReplyProcessor removedPostReplyProcessor =
+                       mock(PostReplyProcessor.class);
+
+       @Before
+       public void setupPosts() {
+               when(oldSone.getPosts()).thenReturn(asList(oldPost, removedPost));
+               when(newSone.getPosts()).thenReturn(asList(oldPost, newPost));
+       }
+
+       @Before
+       public void setupPostProcessors() {
+               soneChangeDetector.onNewPosts(newPostProcessor);
+               soneChangeDetector.onRemovedPosts(removedPostProcessor);
+       }
+
+       @Before
+       public void setupPostReplies() {
+               when(oldSone.getReplies()).thenReturn(
+                               new HashSet<PostReply>(
+                                               asList(oldPostReply, removedPostReply)));
+               when(newSone.getReplies()).thenReturn(
+                               new HashSet<PostReply>(asList(oldPostReply, newPostReply)));
+       }
+
+       @Before
+       public void setupPostReplyProcessors() {
+               soneChangeDetector.onNewPostReplies(newPostReplyProcessor);
+               soneChangeDetector.onRemovedPostReplies(removedPostReplyProcessor);
+       }
+
+       @Test
+       public void changeDetectorDetectsChanges() {
+               soneChangeDetector.detectChanges(newSone);
+
+               verify(newPostProcessor).processPost(newPost);
+               verify(newPostProcessor, never()).processPost(oldPost);
+               verify(newPostProcessor, never()).processPost(removedPost);
+               verify(removedPostProcessor).processPost(removedPost);
+               verify(removedPostProcessor, never()).processPost(oldPost);
+               verify(removedPostProcessor, never()).processPost(newPost);
+
+               verify(newPostReplyProcessor).processPostReply(newPostReply);
+               verify(newPostReplyProcessor, never()).processPostReply(oldPostReply);
+               verify(newPostReplyProcessor, never()).processPostReply(
+                               removedPostReply);
+               verify(removedPostReplyProcessor).processPostReply(removedPostReply);
+               verify(removedPostReplyProcessor, never()).processPostReply(
+                               oldPostReply);
+               verify(removedPostReplyProcessor, never()).processPostReply(
+                               newPostReply);
+       }
+
+       @Test
+       public void changeDetectorDoesNotNotifyAnyProcessorIfProcessorsUnset() {
+           soneChangeDetector.onNewPosts(null);
+           soneChangeDetector.onRemovedPosts(null);
+           soneChangeDetector.onNewPostReplies(null);
+           soneChangeDetector.onRemovedPostReplies(null);
+               soneChangeDetector.detectChanges(newSone);
+               verify(newPostProcessor, never()).processPost(any(Post.class));
+               verify(removedPostProcessor, never()).processPost(any(Post.class));
+               verify(newPostReplyProcessor, never()).processPostReply(any(PostReply.class));
+               verify(removedPostReplyProcessor, never()).processPostReply(any(PostReply.class));
+       }
+
+}