Bug 91081 [quick fix] Quick complete should introspect method change when return val from method
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/ReturnTypeQuickFixTest.java
ArrayList proposals= collectCorrections(cu, astRoot);
		assertNumberOfProposals(proposals, 2);
		assertCorrectLabels(proposals);
		
		ASTRewriteCorrectionProposal proposal= (ASTRewriteCorrectionProposal) proposals.get(0);
		String preview1= getPreviewContent(proposal);
			
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public Runnable getOperation() {\n");
		buf.append("        return new Runnable() {\n");
		buf.append("            public void run() {}\n");
		buf.append("        };\n");				
		buf.append("    }\n");
		buf.append("}\n");
		String expected1= buf.toString();
		
		proposal= (ASTRewriteCorrectionProposal) proposals.get(1);
		String preview2= getPreviewContent(proposal);
			
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public void getOperation() {\n");		
		buf.append("    }\n");
		buf.append("}\n");
		String expected2= buf.toString();
		
		assertEqualStringsIgnoreOrder(new String[] { preview1, preview2 }, new String[] { expected1, expected2 });