Is there any working example of "pytap" TAP emitter for Python
Question: if we look at like in example 3:

    
    
    #TEST SOME STUFF
    from TAP.Simple import *
    
    plan(3)
    
    def in_between(value, bottom, top, msg):
        ret = ok(((bottom = value) and (value = top)), msg)
        if (not ret):
            diag("value %s is not between %s and %s" % (value, bottom, top))
        return ret
    
    in_between(5, 3, 10, "5 is OK.")
    
    in_between(5.5, 5, 6, "5[2] is OK.")
    
    # This will fail.
    in_between(1, 20, 30, "1 is in range.")
    

I am trying to see how i can use this with real Python code

note: the ret = ok statement has <= and => instead of just = , the code was
not getting displayed so i took them out, and i am not sure how to escape them

Here is an example that can be used as a source.

    
    
    '''Convert to and from Roman numerals
    
    This program is part of 'Dive Into Python 3', a free Python book for
    experienced programmers.  Visit http://diveintopython3.ep.io/ for the
    latest version. - old website http://diveintopython3.org/ is not available anymore.
    '''
    
    roman_numeral_map = (('M',  1000),
                         ('CM', 900),
                         ('D',  500),
                         ('CD', 400),
                         ('C',  100),
                         ('XC', 90),
                         ('L',  50),
                         ('XL', 40),
                         ('X',  10),
                         ('IX', 9),
                         ('V',  5),
                         ('IV', 4),
                         ('I',  1))
    
    def to_roman(n):
        '''convert integer to Roman numeral'''
        result = ''
        for numeral, integer in roman_numeral_map:
            while n >= integer:
                result += numeral
                n -= integer
        return result
    
    # Copyright (c) 2009, Mark Pilgrim, All rights reserved.
    # 
    # Redistribution and use in source and binary forms, with or without modification,
    # are permitted provided that the following conditions are met:
    # 
    # * Redistributions of source code must retain the above copyright notice,
    #   this list of conditions and the following disclaimer.
    # * Redistributions in binary form must reproduce the above copyright notice,
    #   this list of conditions and the following disclaimer in the documentation
    #   and/or other materials provided with the distribution.
    # 
    # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
    # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    # POSSIBILITY OF SUCH DAMAGE.
    


Answer: OK , i figured it out myself, by looking at perl's TAP examples, and
transposing it to fit Python

    
    
    #!/usr/bin/env python
    import TAP
    
    ok = TAP.Builder.create(3).ok
    def hello_world():
        return "Hello, World!"
    ok(hello_world() ==  "Hello, World!", "First Test")
    ok(hello_world() is  "Hello, World!", "Second Test")
    ok(isinstance(hello_world(),str), "Third Test")
    

Explanation:

  1. `import TAP` once you have installed it on your host
  2. `ok = TAP.Builder.create(3).ok`: 3 means you plan 3 tests, the rest just follow without questions
  3. First Test uses "code" then condition (`==`) and then expected result

The same goes for `is`, or `isinstance()`

