1 files changed, 67 insertions, 3 deletions
diff --git a/third_party/gif_decoder/src/androidTest/java/com/bumptech/glide/gifdecoder/test/GifBytesTestUtilTest.java b/third_party/gif_decoder/src/androidTest/java/com/bumptech/glide/gifdecoder/test/GifBytesTestUtilTest.java
index 7b25c96b..88106ea6 100644
--- a/third_party/gif_decoder/src/androidTest/java/com/bumptech/glide/gifdecoder/test/GifBytesTestUtilTest.java
+++ b/third_party/gif_decoder/src/androidTest/java/com/bumptech/glide/gifdecoder/test/GifBytesTestUtilTest.java
@@ -3,6 +3,7 @@ package com.bumptech.glide.gifdecoder.test;
 import org.junit.Test;
 
 import java.nio.ByteBuffer;
+import java.util.Arrays;
 
 import static org.junit.Assert.assertArrayEquals;
 
@@ -33,16 +34,79 @@ public class GifBytesTestUtilTest {
     }
 
     @Test
-    public void testWriteImageDescriptor() {
+    public void testWriteImageDescriptorWithoutColorTable() {
         ByteBuffer buffer = ByteBuffer.allocate(GifBytesTestUtil.IMAGE_DESCRIPTOR_LENGTH);
-        GifBytesTestUtil.writeImageDescriptor(buffer, 10, 9, 8, 7);
+        GifBytesTestUtil.writeImageDescriptor(buffer, 10, 9, 8, 7, false, 0);
+
+        byte[] expected = new byte[] {
+                // Image separator.
+                0x2C,
+                // Image left.
+                0x00, 0x0A,
+                // Image right.
+                0x00, 0X09,
+                // Image width.
+                0x00, 0x08,
+                // Image height.
+                0x00, 0x07,
+                // Packed field.
+                0x00
+        };
 
-        byte[] expected = new byte[] { 0x2C, 0x00, 0x0A, 0x00, 0X09, 0x00, 0x08, 0x000, 0x07, 0x00 };
+        assertArrayEquals(expected, buffer.array());
+    }
+
+    @Test
+    public void testWriteImageDescriptorWithColorTable() {
+        ByteBuffer buffer = ByteBuffer.allocate(GifBytesTestUtil.IMAGE_DESCRIPTOR_LENGTH);
+        GifBytesTestUtil.writeImageDescriptor(buffer, 10, 9, 8, 7, true, 4);
+
+        byte packedField =
+                // Set LCT flag
+                (byte) 0x80
+                // Size of color table (2^(N + 1) == 4)
+                | 0x01;
+
+        byte[] expected = new byte[] {
+                // Image separator.
+                0x2C,
+                // Image left.
+                0x00, 0x0A,
+                // Image right.
+                0x00, 0X09,
+                // Image width.
+                0x00, 0x08,
+                // Image height.
+                0x00, 0x07,
+                packedField
+        };
 
         assertArrayEquals(expected, buffer.array());
     }
 
     @Test
+    public void testWriteColorTable() {
+        final int numColors = 4;
+        ByteBuffer buffer = ByteBuffer.allocate(GifBytesTestUtil.getColorTableLength(numColors));
+        GifBytesTestUtil.writeColorTable(buffer, numColors);
+
+        byte[] expected = new byte[] {
+                // First color.
+                0x00, 0x00, 0x00,
+                // Second color.
+                0x00, 0x00, 0x01,
+                // Third color.
+                0x00, 0x00, 0x02,
+                // Fourth color.
+                0x00, 0x00, 0x03,
+        };
+
+
+        assertArrayEquals("expected=" + Arrays.toString(expected) + " received=" + Arrays.toString(buffer.array()),
+                expected, buffer.array());
+    }
+
+    @Test
     public void testWriteFakeImageData() {
         ByteBuffer buffer = ByteBuffer.allocate(4);
         GifBytesTestUtil.writeFakeImageData(buffer, 2);