322 lines
9.1 KiB
Python
322 lines
9.1 KiB
Python
import unittest
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LEFT = 0
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RIGHT = 1
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class Roundabout:
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def __init__(self, rotation = LEFT):
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self.coatHangers = list()
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self.rotation = rotation
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def addList(self, items):
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for item in items:
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self.add(item)
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def add(self, item):
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if self.rotation == LEFT: #linksdrehend
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self.coatHangers.insert(0, item)
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else:
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self.coatHangers.append(item)
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def remove(self):
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if self.rotation == LEFT: #linksdrehend
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return self.coatHangers.pop()
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else:
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return self.coatHangers.pop(0)
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def content(self):
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return self.coatHangers
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def hasItems(self):
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if len(self.coatHangers) == 0:
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return False
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return True
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def itemOnSeparator(self):
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if len(self.coatHangers) == 0:
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return None
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if self.rotation == LEFT: #linksdrehend
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return self.coatHangers[-1]
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else:
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return self.coatHangers[0]
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def getSmallestItem(self):
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return min(self.coatHangers)
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def isEmpty(self):
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return len(self.coatHangers) == 0
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def clear(self):
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self.coatHangers.clear()
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class Switch:
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def __init__(self, left_roundabout: Roundabout, right_roundabout: Roundabout):
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self.lR = left_roundabout
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self.rR = right_roundabout
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self.set_to_left()
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def switch(self):
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if self.is_left():
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self.set_to_right()
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else:
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self.set_to_left()
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def set_to_left(self):
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self.status = LEFT
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return self.status
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def set_to_right(self):
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self.status = RIGHT
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return self.status
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def is_left(self):
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if self.status == LEFT:
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return True
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return False
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def is_right(self):
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if self.status == RIGHT:
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return True
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return False
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def assign(self, item):
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if self.is_left():
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self.lR.add(item)
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else:
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self.rR.add(item)
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class RoundaboutPair:
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def __init__(self, left_roundabout: Roundabout, right_roundabout: Roundabout, switch: Switch):
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self.lR = left_roundabout
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self.rR = right_roundabout
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self.sw = switch
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def sortStepPickSort(self):
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"""Picksort Verfahren. Hole immer das kleinste aus dem Roundabout raus
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"""
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if self.lR.getSmallestItem() == self.lR.itemOnSeparator():
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item = self.lR.remove()
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self.sw.set_to_right() # weiche auf ausschleusen
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self.sw.assign(item) # item auf die Weiche setzen
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self.sw.set_to_left() # weiche wieder zurück setzen
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else:
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item = self.lR.remove()
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self.sw.assign(item)
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def sortStepTupleSort(self):
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doPassage = True
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before = 0
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while doPassage:
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rightItem = self.rR.itemOnSeparator()
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leftItem = self.lR.itemOnSeparator()
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# wenn beide leer sind macht der Methode keinen Sinn
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if rightItem == None and leftItem == None:
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return
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# wenn der linke Kreisel leer ist, sind wir fertig
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if leftItem == None:
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break
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if rightItem is None:
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rightItem = 0
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# raus zum nächsten Schritt. Ende dieses Tupels erreicht.
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if max(leftItem, rightItem) < before:
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break
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if leftItem < rightItem:
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if leftItem > before:
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before = self.doPassageLeftItem()
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if rightItem > before:
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before = self.doPassageRightItem()
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else:
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if rightItem > before:
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before = self.doPassageRightItem()
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if leftItem > before:
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before = self.doPassageLeftItem()
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# Weiche auf die andere Seite stellen
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self.sw.switch()
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return
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def doPassageLeftItem(self):
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"""greift sich das Element vom linken Roundabout und fährt durch die Weiche
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"""
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leftItem = self.lR.itemOnSeparator()
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if leftItem == None:
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return
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leftItem = self.lR.remove()
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self.sw.assign(leftItem)
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return leftItem
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def doPassageRightItem(self):
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"""greift sich das Element vom rechten Roundabout und fährt durch die Weiche
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"""
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rightItem = self.rR.itemOnSeparator()
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if rightItem == None:
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return
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rightItem = self.rR.remove()
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self.sw.assign(rightItem)
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return rightItem
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def runPickSort(self):
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# number = 0
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while not self.lR.isEmpty():
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self.sortStepPickSort()
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# number += 1
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# if number > 300:
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# break
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def runTupleSort(self):
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number = 0
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self.sw.set_to_right()
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runSorting = True
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while runSorting:
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self.sortStepTupleSort()
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if self.lR.isEmpty():
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break
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def show(self):
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return (self.lR.content(), self.rR.content())
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class TestObjectMethods(unittest.TestCase):
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def test_roundabout(self):
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k1 = Roundabout()
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k1.addList([1, 2, 3])
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self.assertEqual(k1.content(), [3, 2, 1])
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self.assertEqual(k1.remove(), 1)
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self.assertEqual(k1.content(), [3, 2])
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k2 = Roundabout(LEFT) # links drehend - default
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k2.add(1)
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k2.add(2)
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k2.add(3)
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k2.add(4)
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self.assertEqual(k2.content(), [4, 3, 2, 1])
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k3 = Roundabout(RIGHT) # rechts drehend
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k3.add(5)
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k3.add(6)
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k3.add(7)
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k3.add(8)
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self.assertEqual(k3.content(), [5, 6, 7, 8])
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self.assertEqual(k2.itemOnSeparator(), 1)
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self.assertEqual(k3.itemOnSeparator(), 5)
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self.assertEqual(k3.remove(), 5)
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self.assertEqual(k2.remove(), 1)
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k5 = Roundabout()
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self.assertEqual(k5.isEmpty(), True)
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k5.addList([1, 2, 3])
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self.assertEqual(k5.isEmpty(), False)
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self.assertEqual(k5.getSmallestItem(), 1)
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def test_switch(self):
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k1 = Roundabout()
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k2 = Roundabout()
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sw = Switch(k1, k2)
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self.assertEqual(sw.set_to_left(), 0)
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sw.set_to_right()
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self.assertEqual(sw.is_right(), True)
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self.assertEqual(sw.is_left(), False)
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def test_pair(self):
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lK = Roundabout()
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lK.addList([6, 5, 4, 3, 2, 1])
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rK = Roundabout(1)
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sw = Switch(lK, rK)
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p = RoundaboutPair(lK, rK, sw)
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self.assertEqual(lK.content(), [1, 2, 3, 4, 5, 6])
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self.assertEqual(p.show(), ([1, 2, 3, 4, 5, 6], []))
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p.sortStepPickSort()
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self.assertEqual(p.show(), ([6, 1, 2, 3, 4, 5], []))
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p.sortStepPickSort()
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self.assertEqual(p.show(), ([5, 6, 1, 2, 3, 4], []))
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p.sortStepPickSort()
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self.assertEqual(p.show(), ([4, 5, 6, 1, 2, 3], []))
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p.sortStepPickSort()
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self.assertEqual(p.show(), ([3, 4, 5, 6, 1, 2], []))
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p.sortStepPickSort()
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self.assertEqual(p.show(), ([2, 3, 4, 5, 6, 1], []))
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p.sortStepPickSort()
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self.assertEqual(p.show(), ([2, 3, 4, 5, 6], [1]))
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def test_picksort(self):
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lK = Roundabout()
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lK.addList([6, 5, 4, 3, 2, 1])
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rK = Roundabout(1)
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sw = Switch(lK, rK)
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p = RoundaboutPair(lK, rK, sw)
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self.assertEqual(lK.content(), [1, 2, 3, 4, 5, 6])
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p.runPickSort()
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self.assertEqual(p.show(), ([], [1, 2, 3, 4, 5, 6]))
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def test_tuplesort_equal(self):
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lK = Roundabout()
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lK.addList([3, 2, 1])
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rK = Roundabout(1)
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rK.addList([6, 5, 4])
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sw = Switch(lK, rK)
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p = RoundaboutPair(lK, rK, sw)
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sw.set_to_right()
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self.assertEqual(p.show(), ([1, 2, 3], [6, 5, 4]))
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p.sortStepTupleSort()
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self.assertEqual(p.show(), ([1, 2], [5, 4, 3, 6]))
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p.sortStepTupleSort()
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self.assertEqual(p.show(), ([5, 2, 1], [4, 3, 6]))
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p.sortStepTupleSort()
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self.assertEqual(p.show(), ([5, 2], [3, 6, 1, 4]))
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p.sortStepTupleSort()
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self.assertEqual(p.show(), ([6, 5, 3, 2], [1, 4]))
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p.sortStepTupleSort()
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self.assertEqual(p.show(), ([], [1, 2, 3, 4, 5, 6]))
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def test_tuplesort_onlyleft(self):
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# Roundabouts befüllen
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lK = Roundabout()
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lK.addList([1, 2, 3, 4, 5])
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rK = Roundabout(1)
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rK.addList([])
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sw = Switch(lK, rK)
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p = RoundaboutPair(lK, rK, sw)
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self.assertEqual(p.show(), ([5, 4, 3, 2, 1], [] ))
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sw.set_to_right()
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# Sortierung starten
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p.sortStepTupleSort()
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self.assertEqual(p.show(), ([], [1, 2, 3, 4, 5] ))
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def test_tuplesort_presorted(self):
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lK = Roundabout()
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lK.addList([2, 5])
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rK = Roundabout(1)
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rK.addList([3, 6, 1, 4])
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sw = Switch(lK, rK)
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p = RoundaboutPair(lK, rK, sw)
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self.assertEqual(p.show(), ([5, 2], [3, 6, 1, 4] ))
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sw.set_to_left()
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p.sortStepTupleSort()
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self.assertEqual(p.show(), ([6, 5, 3, 2], [1, 4] )) # r
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p.sortStepTupleSort()
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self.assertEqual(p.show(), ([], [1, 2, 3, 4, 5, 6] )) # l
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if __name__ == '__main__':
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unittest.main()
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