public void beforeAfterLine() { String actual; using (Pnyx p = new Pnyx()) { p.readString(PLANETS_GODS); p.beforeAfterFilter(1, 1, pn => pn.grep("mercury", caseSensitive: false)); actual = p.processToString(); } const String expected = @"Cronus,Saturn,""Titan sky god, supreme ruler of the titans"" Hermes,Mercury,""Messenger of the gods, escort of souls to Hades"" Poseidon,Neptune,""God of the sea and earthquakes"" "; Assert.Equal(expected, actual); }