python-patterns/mediator.py at master · walidshaari/python-patterns · GitHub

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#!/usr/bin/env python

# -*- coding: utf-8 -*-

"""http://dpip.testingperspective.com/?p=28"""

import random

import time

class TC:

def __init__(self):

self._tm = None

self._bProblem = 0

def setup(self):

print("Setting up the Test")

time.sleep(0.1)

self._tm.prepareReporting()

def execute(self):

if not self._bProblem:

print("Executing the test")

time.sleep(0.1)

else:

print("Problem in setup. Test not executed.")

def tearDown(self):

if not self._bProblem:

print("Tearing down")

time.sleep(0.1)

self._tm.publishReport()

else:

print("Test not executed. No tear down required.")

def setTM(self, tm):

self._tm = tm

def setProblem(self, value):

self._bProblem = value

class Reporter:

def __init__(self):

self._tm = None

def prepare(self):

print("Reporter Class is preparing to report the results")

time.sleep(0.1)

def report(self):

print("Reporting the results of Test")

time.sleep(0.1)

def setTM(self, tm):

self._tm = tm

class DB:

def __init__(self):

self._tm = None

def insert(self):

print("Inserting the execution begin status in the Database")

time.sleep(0.1)

# Following code is to simulate a communication from DB to TC

if random.randrange(1, 4) == 3:

return -1

def update(self):

print("Updating the test results in Database")

time.sleep(0.1)

def setTM(self, tm):

self._tm = tm

class TestManager:

def __init__(self):

self._reporter = None

self._db = None

self._tc = None

def prepareReporting(self):

rvalue = self._db.insert()

if rvalue == -1:

self._tc.setProblem(1)

self._reporter.prepare()

def setReporter(self, reporter):

self._reporter = reporter

def setDB(self, db):

self._db = db

def publishReport(self):

self._db.update()

self._reporter.report()

def setTC(self, tc):

self._tc = tc

if __name__ == '__main__':

reporter = Reporter()

db = DB()

tm = TestManager()

tm.setReporter(reporter)

tm.setDB(db)

reporter.setTM(tm)

db.setTM(tm)

# For simplification we are looping on the same test.

# Practically, it could be about various unique test classes and their

# objects

for i in range(3):

tc = TC()

tc.setTM(tm)

tm.setTC(tc)

tc.setup()

tc.execute()

tc.tearDown()

### OUTPUT ###

# Setting up the Test

# Inserting the execution begin status in the Database

# Executing the test

# Tearing down

# Updating the test results in Database

# Reporting the results of Test

# Setting up the Test

# Inserting the execution begin status in the Database

# Reporter Class is preparing to report the results

# Problem in setup. Test not executed.

# Test not executed. No tear down required.

# Setting up the Test

# Inserting the execution begin status in the Database

# Executing the test

# Tearing down

# Updating the test results in Database

# Reporting the results of Test

python-patterns/mediator.py at master · walidshaari/python-patterns · GitHub

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