add test files after reverting of 7.0 GIF frames are of ImageType GIF

GIF frames are of ImageType GIF

this way the following code acts as expected:

assertEquals(ImageType.GIF, ImageDataFactory.create(GIF_FILE_AS_BYTE_ARRAY).getOriginalType());

Codepath:
1. com.itextpdf.io.image.ImageDataFactory.createImageInstance(byte[], boolean) uses GifImageHelper.processImage(image, 0); to read first GIF Frame
2. first Frame is returned via image.getFrames().get(0)

format test class GifTest

Revert "GIF frames are of ImageType GIF"

This reverts commit af848c4.

GIF frames are of ImageType GIF

this way the following code acts as expected:

assertEquals(ImageType.GIF, ImageDataFactory.create(GIF_FILE_AS_BYTE_ARRAY).getOriginalType());

Codepath:
1. com.itextpdf.io.image.ImageDataFactory.createImageInstance(byte[], boolean) uses GifImageHelper.processImage(image, 0); to read first GIF Frame
2. first Frame is returned via image.getFrames().get(0)

Author: pkjuak

io/src/main/java/com/itextpdf/io/image/GifImageHelper.java

@@ -303,7 +303,7 @@ private static void readFrame(GifParameters gif) throws java.io.IOException {
             colorspace[3] = PdfEncodings.convertToString(gif.m_curr_table, null);
             Map<String, Object> ad = new HashMap<>();
             ad.put("ColorSpace", colorspace);
-            RawImageData img = new RawImageData(gif.m_out, ImageType.NONE);
+            RawImageData img = new RawImageData(gif.m_out, ImageType.GIF);
             RawImageHelper.updateRawImageParameters(img, gif.iw, gif.ih, 1, gif.m_bpc, gif.m_out);
             RawImageHelper.updateImageAttributes(img, ad);
             gif.image.addFrame(img);

io/src/test/java/com/itextpdf/io/image/GifTest.java

@@ -0,0 +1,66 @@
+/*
+    This file is part of the iText (R) project.
+    Copyright (c) 1998-2018 iText Group NV
+    Authors: iText Software.
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License version 3
+    as published by the Free Software Foundation with the addition of the
+    following permission added to Section 15 as permitted in Section 7(a):
+    FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
+    ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
+    OF THIRD PARTY RIGHTS
+
+    This program is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE.
+    See the GNU Affero General Public License for more details.
+    You should have received a copy of the GNU Affero General Public License
+    along with this program; if not, see http://www.gnu.org/licenses or write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA, 02110-1301 USA, or download the license from the following URL:
+    http://itextpdf.com/terms-of-use/
+
+    The interactive user interfaces in modified source and object code versions
+    of this program must display Appropriate Legal Notices, as required under
+    Section 5 of the GNU Affero General Public License.
+
+    In accordance with Section 7(b) of the GNU Affero General Public License,
+    a covered work must retain the producer line in every PDF that is created
+    or manipulated using iText.
+
+    You can be released from the requirements of the license by purchasing
+    a commercial license. Buying such a license is mandatory as soon as you
+    develop commercial activities involving the iText software without
+    disclosing the source code of your own applications.
+    These activities include: offering paid services to customers as an ASP,
+    serving PDFs on the fly in a web application, shipping iText with a closed
+    source product.
+
+    For more information, please contact iText Software Corp. at this
+    address: [email protected]
+ */
+
+package com.itextpdf.io.image;
+
+import com.itextpdf.io.util.StreamUtil;
+import com.itextpdf.test.annotations.type.UnitTest;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+@Category(UnitTest.class)
+public class GifTest {
+    public static final String sourceFolder = "./src/test/resources/com/itextpdf/io/image/";
+
+    @Test
+    public void gifImageTest() throws IOException {
+        byte[] fileContent = StreamUtil.inputStreamToArray( new FileInputStream( sourceFolder+"WP_20140410_001.gif" ) );
+        ImageData img = ImageDataFactory.create( fileContent, false );
+        Assert.assertTrue( img.isRawImage() );
+        Assert.assertEquals( ImageType.GIF, img.getOriginalType() );
+
+    }
+}