pdf.Stream.getFilters() result is unmodifiable.

eseifert · Aug 19, 2017 · ff38218 · ff38218
1 parent 5d1694d
commit ff38218
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/src/test/java/de/erichseifert/vectorgraphics2d/pdf/StreamTest.java b/src/test/java/de/erichseifert/vectorgraphics2d/pdf/StreamTest.java
@@ -26,6 +26,7 @@
 import static org.junit.Assert.assertThat;
 
 import java.io.IOException;
+import java.util.List;
 import java.util.zip.DataFormatException;
 import java.util.zip.Inflater;
 import org.junit.Test;
@@ -130,4 +131,12 @@ public void contentsAreCompressedWhenFlateFilterIsSet() throws DataFormatExcepti
 		decompressor.inflate(decompressedOutput);
 		assertThat(decompressedOutput, is(inputData));
 	}
+
+	@Test(expected = UnsupportedOperationException.class)
+	public void getFiltersResultIsUnmodifiable() {
+		Stream stream = new Stream();
+
+		List<Stream.Filter> filters = stream.getFilters();
+		filters.add(Stream.Filter.FLATE);
+	}
 }