Python版

 

https://github.com/faif/python-patterns/blob/master/behavioral/mediator.py

#!/usr/bin/env python# -*- coding: utf-8 -*-"""http://web.archive.org/web/20120309135549/http://dpip.testingperspective.com/?p=28*TL;DR80Encapsulates how a set of objects interact."""import randomimport timeclass 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 = valueclass 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 = tmclass 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 = tmclass 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 = tcif __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