Python code coverage

Measuring code coverage of Python programs:

• https://coverage.readthedocs.io/en/v4.5.x/
• https://devguide.python.org/coverage/

$ coverage help 

• help        Get help on using coverage.py.
• run         Run a Python program and measure code execution.
• html        Create an HTML report.  –> creates htmlcov/index.html

Your program runs just as if it had been invoked with the Python command line.

$ coverage run my_program.py arg1 arg2

Rather than providing a file name, you can use the -m switch and specify an importable module name instead, just as you can with the Python -m switch:

$ coverage run -m packagename.modulename arg1 arg2

parseCommandLine.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
https://www.tutorialspoint.com/python/python_command_line_arguments.htm
"""
 
import sys, getopt
 
 
def main(argv):
   inputfile = ''
   outputfile = ''
   try:
      opts, args = getopt.getopt(argv,"hi:o:",["ifile=","ofile="])
   except getopt.GetoptError:
      print 'test.py -i <inputfile> -o <outputfile>'
      sys.exit(2)
   for opt, arg in opts:
      if opt == '-h':
         print 'test.py -i <inputfile> -o <outputfile>'
         sys.exit()
      elif opt in ("-i", "--ifile"):
         inputfile = arg
      elif opt in ("-o", "--ofile"):
         outputfile = arg
   print 'Input file is "', inputfile
   print 'Output file is "', outputfile
 
if __name__ == "__main__":
   print 'Number of arguments:', len(sys.argv), 'arguments.'
   print 'Argument List:', str(sys.argv)
 
   main(sys.argv[1:])

$ coverage run parseCommandLine.py
Number of arguments: 1 arguments.
Argument List: ['parseCommandLine.py']
Input file is "
Output file is "
$ coverage html
$ firefox htmlcov/index.html