comby/community

Hi all - wondering if someone could help me understand how the whitespace matching works. I'm trying to move a method expectation into the method, something like:

    @Test(expected = IllegalArgumentException.class)
    public void lengthOf7CannotSupportMoreThan90Years() {
        ReferenceEncoder unitUnderTest = new ReferenceEncoder(LENGTH_FOR_90_YEARS);
        unitUnderTest.getBase64FromLong(millisInMoreThan90Years);
    }

should become

    @Test
    public void lengthOf7CannotSupportMoreThan90Years() {
    org.junit.jupiter.api.Assertions.assertThrows(IllegalArgumentException.class, ()-> {
    ReferenceEncoder unitUnderTest = new ReferenceEncoder(LENGTH_FOR_90_YEARS);
        unitUnderTest.getBase64FromLong(millisInMoreThan90Years);
    });
}

Using this recipe:

match='''@Test(expected = :[ex])
public void :[testname]() {
:[testbody]
}'''

rewrite='''@Test
public void :[testname]() {
    org.junit.jupiter.api.Assertions.assertThrows(:[ex], ()-> {
:[testbody]
    });
}'''

This works, however, it's chopping the indentation off the first line. So I thought I could use :[ var] (as per the documentation here https://comby.dev/docs/syntax-reference) to match the whitespace at the beginning of the first line, and reinsert it afterwards, something like:

match='''@Test(expected = :[ex])
:[ ws1]public void :[testname]() {
:[testbody]
:[ ws2]}'''

rewrite='''@Test
:[ ws1]public void :[testname]() {
    org.junit.jupiter.api.Assertions.assertThrows(:[ex], ()-> {
:[testbody]
    });
:[ ws2]}'''

But when I do this, it no longer matches my method at all (I have also tested this on the web playground, and it doesn't match there either). Any suggestions?