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test_exercise3.py
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test_exercise3.py
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#!/usr/bin/env python
""" Assignment 2, Exercise 3, INF1340, Fall, 2015. DBMS
Test module for exercise3.py
"""
__author__ = 'Susan Sim'
__email__ = "ses@drsusansim.org"
__copyright__ = "2015 Susan Sim"
__license__ = "MIT License"
import pytest
import mock
from exercise3 import union, intersection, difference
###########
# TABLES ##
###########
GRADUATES = [["Number", "Surname", "Age"],
[7274, "Robinson", 37],
[7432, "O'Malley", 39],
[9824, "Darkes", 38]]
MANAGERS = [["Number", "Surname", "Age"],
[9297, "O'Malley", 56],
[7432, "O'Malley", 39],
[9824, "Darkes", 38]]
PROFESSORS = [["Number", "Surname", "Age", "Gender"],
[7274, "Robinson", 37],
[7432, "O'Malley", 39],
[9824, "Darkes", 38],
[4343, "Susan", 35]]
FACULTY_ADMINISTRATION = [["Number", "Name", "Age"],
[7274, "Robinson", 37],
[7432, "O'Malley", 39],
[9824, "Darkes", 38]]
CLASSES = [["Number", "Surname", "Age"],
["Math", 1003, 55],
["English", 1340, 54],
["Science", 1341, 50]]
STUDENTS = [["Number", "Surname", "Age"],
[7274, "Robinson", 37],
[7432, "O'Malley", 39],
[9824, "Darkes", 38]]
from exercise3 import union, intersection, difference
#####################
# HELPER FUNCTIONS ##
#####################
def is_equal(t1, t2):
return sorted(t1) == sorted(t2)
###################
# TEST FUNCTIONS ##
###################
def test_union():
"""
Test union operation and checks for duplicates.
"""
result = [["Number", "Surname", "Age"],
[7274, "Robinson", 37],
[9297, "O'Malley", 56],
[7432, "O'Malley", 39],
[9824, "Darkes", 38]]
assert is_equal(result, union(GRADUATES, MANAGERS))
result2 = [["Number", "Surname", "Age"], [7274, "Robinson", 37], [7432, "O'Malley", 39], [9824, "Darkes", 38]]
assert is_equal(result2, union(GRADUATES, STUDENTS))
def test_intersection():
"""
Test intersection function and show all unique rows from t1 and t2
"""
result = [["Number", "Surname", "Age"],
[7432, "O'Malley", 39],
[9824, "Darkes", 38]]
assert is_equal(result, intersection(GRADUATES, MANAGERS))
result2 = [['Number', 'Surname', 'Age'], [7274, 'Robinson', 37], [7432, "O'Malley", 39], [9824, 'Darkes', 38]]
assert is_equal(result2, intersection(GRADUATES, STUDENTS))
# test output when empty table expected
assert intersection(GRADUATES, CLASSES) is None
def test_lengths_equal():
"""
This is a function that tests if the table column lengths are equal
"""
with pytest.raises(Exception):
union(PROFESSORS, GRADUATES)
def test_names_equal():
"""
A function that tests if the names and lengths of the first column are equal
"""
with pytest.raises(Exception):
union(FACULTY_ADMINISTRATION, GRADUATES)
def test_difference():
"""
Test difference operation and shows all unique rows in Graduates
"""
result = [["Number", "Surname", "Age"],
[7274, "Robinson", 37]]
assert is_equal(result, difference(GRADUATES, MANAGERS))
# test output when empty table expected
assert difference(GRADUATES, STUDENTS) is None