Bug 40557 quick fix: improve return type guessing
3.0 M2 class A { private boolean foo() { return f(1) || f(2); } } quich fix should be able to figure out that i want 'f' to be a boolean method
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/UnresolvedMethodsQuickFixTest.java
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(int i) {\n");
		buf.append("        A a= new A(i);\n");
		buf.append("    }\n");
		buf.append("}\n");
		ICompilationUnit cu1=pack1.createCompilationUnit("E.java", buf.toString(), false, null);
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class A {\n");
		buf.append("}\n");
		pack1.createCompilationUnit("A.java", buf.toString(), false, null);
		
		CompilationUnit astRoot= AST.parseCompilationUnit(cu1, true);
		ArrayList proposals= collectCorrections(cu1, astRoot);
		assertNumberOf("proposals", proposals.size(), 1);
		assertCorrectLabels(proposals);
		NewMethodCompletionProposal proposal= (NewMethodCompletionProposal) proposals.get(0);
		String preview= proposal.getCompilationUnitChange().getPreviewContent();
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class A {\n");
		buf.append("\n");
		buf.append("    public A(int i) {\n");
		buf.append("    }\n");		
		buf.append("}\n");
		assertEqualString(preview, buf.toString());
	}