import unittest
from tudelft.utilities.immutablelist.ArrayListSet import ArrayListSet

class ArrayListTest (unittest.TestCase) :
    
    def setUp(self):
        self.set = ArrayListSet[str]() 
        self.setReverse = ArrayListSet[str]()
    
        self.set.append("a");
        self.set.append("b");
        self.setReverse.append("b");
        self.setReverse.append("a");

    def testContains(self):
        self.assertTrue("a" in self.set)
        self.assertFalse("c" in self.set)

    def testEquality(self):
        self.assertEqual(self.set, self.setReverse)

    def testHashCodeInsensitiveToOrder(self):
        self.assertEqual(hash(self.set), hash(self.setReverse))

    def testAdd(self):
        self.assertEqual(2, len(self.set))
        self.set.append("a")
        self.assertEqual(2, len(self.set))
        self.set.append("c")
        self.assertEqual(3, len(self.set))


    def testRemove(self) :
        self.assertEqual(2, len(self.set))
        self.set.remove("a")
        self.assertEqual(1, len(self.set))

    def testAddAt(self) :
        self.set.insert(1, "a"); # nothing happens, a already in set.
        self.assertEqual(2, len(self.set))
        self.set.insert(1, "c");
        self.assertEqual("c", self.set[1])