def test_repeated_add():
'''
Purpose: This function checks repeated addition of same element
'''
lww = LWW()
lww.add(1)
lww.remove(1)
lww.add(1)
lww.remove(1)
assert not lww.exist(1)
def test_add():
'''
Purpose: This function tests if an element has been added successfully to the LWW
'''
lww = LWW()
lww.add(1)
lww.add("test variable")
assert lww.exist(1)
assert lww.exist("test variable")
assert not lww.exist("dummy")
def test_remove():
'''
Purpose: This function tests if an element has been removed successfully from the LWW
'''
lww = LWW()
lww.remove(1)
assert not lww.exist(1)
lww.add(1)
assert lww.exist(1)
def test_remove_add():
'''
Purpose: This function checks remove operation followed by addition operation
'''
lww = LWW()
lww.remove(1)
lww.add(1)
assert lww.exist(1)
def test_validate_timestamp():
'''
Purpose: This function validates timestamps of the elements
'''
lww = LWW()
lww.add(1)
lww.add(2)
lww.add(3)
lww.remove(4)
lww.remove(2)
assert lww.remove_set[2] > lww.add_set[2]
assert lww.add_set[3] > lww.add_set[2]
assert lww.remove_set[4] > lww.add_set[3]
assert lww.remove_set[2] > lww.remove_set[4]
def test_merge():
'''
Purpose: This function tests functionality of merge method
'''
lww_1 = LWW()
lww_2 = LWW()
lww_1.add(1)
lww_1.add(2)
lww_1.remove(1)
lww_2.add(1)
lwW_2.add(5)
lww_1.remove(5)
lww_2.remove(1)
lww = lww_1.merge(lww_2)
assert lww.add_set[1] == lww2.add_set[1]
assert lww.add_set[1] > lww1.add_set[1]
assert lww.add_set[3] < lww1.remove_set[3]
assert lww.remove_set[1] == lww2.remove_set[1]