fix the PartDatabase tests

Closes #3210
// FREEBIE

src/org/thoughtcrime/securesms/database/PartDatabase.java

@@ -640,5 +640,15 @@ public class PartDatabase extends Database {
     public boolean isValid() {
       return rowId >= 0 && uniqueId >= 0;
     }
+
+    @Override
+    public boolean equals(Object object) {
+      if (!(object instanceof PartId)){
+        return false;
+      }
+
+      PartId other = (PartId) object;
+      return rowId == other.rowId && uniqueId == other.uniqueId;
+    }
   }
 }

test/androidTest/java/org/thoughtcrime/securesms/database/PartDatabaseTest.java

@@ -4,6 +4,7 @@ import android.net.Uri;
 
 import org.thoughtcrime.securesms.TextSecureTestCase;
 import org.thoughtcrime.securesms.crypto.MasterSecret;
+import org.thoughtcrime.securesms.database.PartDatabase.PartId;
 
 import java.io.FileNotFoundException;
 import java.io.InputStream;
@@ -12,7 +13,6 @@ import ws.com.google.android.mms.pdu.PduPart;
 
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyFloat;
-import static org.mockito.Matchers.anyLong;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.doReturn;
@@ -23,7 +23,8 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 public class PartDatabaseTest extends TextSecureTestCase {
-  private static final long PART_ID = 1L;
+  private static final long ROW_ID    = 1L;
+  private static final long UNIQUE_ID = 2L;
 
   private PartDatabase database;
 
@@ -33,21 +34,21 @@ public class PartDatabaseTest extends TextSecureTestCase {
   }
 
   public void testTaskNotRunWhenThumbnailExists() throws Exception {
-    when(database.getPart(eq(PART_ID))).thenReturn(getPduPartSkeleton("x/x"));
-    doReturn(mock(InputStream.class)).when(database).getDataStream(any(MasterSecret.class), anyLong(), eq("thumbnail"));
+    when(database.getPart(new PartId(ROW_ID, UNIQUE_ID))).thenReturn(getPduPartSkeleton("x/x"));
+    doReturn(mock(InputStream.class)).when(database).getDataStream(any(MasterSecret.class), any(PartId.class), eq("thumbnail"));
 
-    database.getThumbnailStream(null, PART_ID);
+    database.getThumbnailStream(null, new PartId(ROW_ID, UNIQUE_ID));
 
-    verify(database, never()).updatePartThumbnail(any(MasterSecret.class), anyLong(), any(PduPart.class), any(InputStream.class), anyFloat());
+    verify(database, never()).updatePartThumbnail(any(MasterSecret.class), any(PartId.class), any(PduPart.class), any(InputStream.class), anyFloat());
   }
 
   public void testTaskRunWhenThumbnailMissing() throws Exception {
-    when(database.getPart(eq(PART_ID))).thenReturn(getPduPartSkeleton("image/png"));
-    doReturn(null).when(database).getDataStream(any(MasterSecret.class), anyLong(), eq("thumbnail"));
-    doNothing().when(database).updatePartThumbnail(any(MasterSecret.class), anyLong(), any(PduPart.class), any(InputStream.class), anyFloat());
+    when(database.getPart(new PartId(ROW_ID, UNIQUE_ID))).thenReturn(getPduPartSkeleton("image/png"));
+    doReturn(null).when(database).getDataStream(any(MasterSecret.class), any(PartId.class), eq("thumbnail"));
+    doNothing().when(database).updatePartThumbnail(any(MasterSecret.class), any(PartId.class), any(PduPart.class), any(InputStream.class), anyFloat());
 
     try {
-      database.new ThumbnailFetchCallable(mock(MasterSecret.class), PART_ID).call();
+      database.new ThumbnailFetchCallable(mock(MasterSecret.class), new PartId(ROW_ID, UNIQUE_ID)).call();
       throw new AssertionError("didn't try to generate thumbnail");
     } catch (FileNotFoundException fnfe) {
       // success