def lineCount = 1
        def filter = new LineFilter(input, { "${lineCount++} - $it" as String })

        assertThat(filter.text, equalTo(""))
    }

    @Test void testEmptyLinesWithTrailingEOL() {
        def input = new StringReader("\n\n")
        def lineCount = 1
        def filter = new LineFilter(input, { "${lineCount++} - $it" as String })