IfCommand issue in jxls library

[meltiserProjects]

Dear all,

First of all, I would like to thank you and your team for jxls library, it really helps the community to work with excel files easier and faster.

I'm using version 3.0.0. I have a concern regarding one test:

jxls/jxls-poi/src/test/java/org/jxls3/IfTest.java

Lines 83 to 109 in a1bb43e

	@Test
	public void noNotes() {
	// Test
	InputStream template = getClass().getResourceAsStream("IfTest_noNotes.xlsx");
	File out = new File("target/IfTest_noNotes_output.xlsx");
	out.getParentFile().mkdirs();
	JxlsTemplateFiller builder = JxlsPoiTemplateFillerBuilder.newInstance().withAreaBuilder((transformer, ctc) -> {
	List<Area> areas = new ArrayList<>();
	XlsArea area = new XlsArea("Employees!A1:C2", transformer);
	areas.add(area);
	XlsArea eachArea = new XlsArea("Employees!A2:C2", transformer);
	area.addCommand("A2:C2", new EachCommand("e", "employees", eachArea));
	eachArea.addCommand("A2:C2", new IfCommand("e.payment<2000", new XlsArea("Employees!A2:C2", transformer), new XlsArea("Employees!A3:C3", transformer)));
	return areas;
	}).withTemplate(template).build();
	builder.fill(data(), new JxlsOutputFile(out));
	// Verify
	try (TestWorkbook w = new TestWorkbook(out)) {
	w.selectSheet("Employees");
	assertEquals("Elsa", w.getCellValueAsString(2, 1));
	assertEquals("Oleg", w.getCellValueAsString(3, 1));
	assertEquals("Neil", w.getCellValueAsString(4, 1));
	assertEquals("Maria", w.getCellValueAsString(5, 1));
	assertEquals("John", w.getCellValueAsString(6, 1));
	}
	}

while reviewing the jxls repository, I have noticed that if I change the data method here:

jxls/jxls-poi/src/test/java/org/jxls3/IfTest.java

Line 98 in a1bb43e

builder.fill(data(), new JxlsOutputFile(out));

by returning only one employee (like this):

public static List<Employee> generateSampleEmployeeData() {
    try {
        List<Employee> employees = new ArrayList<>();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MMM-dd", Locale.US);
        employees.add( new Employee("Elsa", dateFormat.parse("1970-Jul-10"), 1500, 0.15) );
        return employees;
    } catch (ParseException e) {
        throw new RuntimeException(e);
    }
})

I'm getting this excel result:

Is it some known behavior or is it a bug? Is there any workaround for this? I'm experiencing the same behavior in my application right now, and I don't know how to fix it. I mean how to return only one row without template data, if I have "if" statement.

Thanks for your help!