fDocument.replace(39, 1, null);
fDocument.replace(39, 1, "");
	public void testChangeContentTypeOfPartition() {		try {						fDocument.replace(39, 1, null);			//	"xxx\n/*xxx*/\nxxx\n/**xxx*/\nxxx\n/**/\nxxx\n/**/\nxxx"						assertTrue(fDocumentPartitioningChanged);									ITypedRegion[] result= fDocument.computePartitioning(0, fDocument.getLength());			TypedRegion[] expectation= {				new TypedRegion(0,  4, IDocument.DEFAULT_CONTENT_TYPE),				new TypedRegion(4,  7, IJavaPartitions.JAVA_MULTI_LINE_COMMENT),				new TypedRegion(11, 5, IDocument.DEFAULT_CONTENT_TYPE),				new TypedRegion(16, 8, IJavaPartitions.JAVA_DOC),				new TypedRegion(24, 5, IDocument.DEFAULT_CONTENT_TYPE),				new TypedRegion(29, 4, IJavaPartitions.JAVA_MULTI_LINE_COMMENT),				new TypedRegion(33, 5, IDocument.DEFAULT_CONTENT_TYPE),				new TypedRegion(38, 4, IJavaPartitions.JAVA_MULTI_LINE_COMMENT),				new TypedRegion(42, 4, IDocument.DEFAULT_CONTENT_TYPE)			};						checkPartitioning(expectation, result);		} catch (BadLocationException x) {			assertTrue(false);		}		}