Instrument program flow Given swift file Filter to lines that contain statements Precede first statement of lines with println("co.swizzlr.worstthing: __FILE__ // __LINE__"); Record all occurrences of println insertion Generate coverage output Build special version of module under test with above modifications Run test suite against module Record output Filter by co.swizzlr.worstthing Parse line occurrences For each line generate null if no println statement, or an int displaying how many times the statement was triggered. Submit to coveralls Take above output, profit.
