Bug 43248 "Assign statement to local variable" removes preceeding comment [quick assist] [ast rewrite]
Consider the method public void a() { // here is a comment System.getenv("");X } where X denotes the cursor. If the quick fix "Assign statement to local variable" is used the comment disapears...
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/AssistQuickFixTest.java
assertEqualString(preview, buf.toString());	
	}
	
	public void testUnwrapAnonymous() throws Exception {
	
		IPackageFragment pack1= fSourceFolder.createPackageFragment("test1", false, null);
		StringBuffer buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public void foo() {\n");
		buf.append("        Runnable run= new Runnable() {\n");
		buf.append("            public void run() { \n");
		buf.append("                throw new NullPointerException();\n");
		buf.append("            }\n");
		buf.append("        };\n");
		buf.append("    }\n");
		buf.append("}\n");
		ICompilationUnit cu= pack1.createCompilationUnit("E.java", buf.toString(), false, null);
		
		String str= "};";
		AssistContext context= getCorrectionContext(cu, buf.toString().indexOf(str), 0);
		List proposals= collectAssists(context, false);
		
		assertNumberOf("proposals", proposals.size(), 1);
		assertCorrectLabels(proposals);
		
		CUCorrectionProposal proposal= (CUCorrectionProposal) proposals.get(0);
		String preview= proposal.getCompilationUnitChange().getPreviewContent();
		buf= new StringBuffer();
		buf.append("package test1;\n");