482 lines
18 KiB
Python
482 lines
18 KiB
Python
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"""
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Unit tests for core tablet management functions
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Tests loan logic, validation, and database operations
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"""
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import pytest
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import sqlite3
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from datetime import datetime
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import sys
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import os
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# Import the functions from minimal_app (they work with any db connection)
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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def get_tablet_count(conn):
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"""Helper to get tablet count"""
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cursor = conn.cursor()
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cursor.execute("SELECT COUNT(*) FROM tablets")
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return cursor.fetchone()[0]
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def get_user_count(conn):
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"""Helper to get user count"""
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cursor = conn.cursor()
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cursor.execute("SELECT COUNT(*) FROM users")
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return cursor.fetchone()[0]
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def get_loan_count(conn):
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"""Helper to get loan count"""
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cursor = conn.cursor()
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cursor.execute("SELECT COUNT(*) FROM loans")
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return cursor.fetchone()[0]
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class TestTabletOperations:
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"""Tests for tablet CRUD operations"""
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def test_add_tablet_success(self, db_conn):
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"""Test adding a new tablet successfully"""
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cursor = db_conn.cursor()
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# Add a tablet
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cursor.execute('''
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INSERT INTO tablets (brand, model, serial_number, status)
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VALUES (?, ?, ?, 'available')
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''', ('TestBrand', 'TestModel', 'TEST001'))
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db_conn.commit()
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# Verify it was added
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cursor.execute("SELECT * FROM tablets WHERE serial_number = 'TEST001'")
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tablet = cursor.fetchone()
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assert tablet is not None
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assert tablet['brand'] == 'TestBrand'
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assert tablet['model'] == 'TestModel'
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assert tablet['serial_number'] == 'TEST001'
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assert tablet['status'] == 'available'
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def test_add_tablet_duplicate_serial(self, db_conn):
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"""Test that duplicate serial numbers are rejected"""
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cursor = db_conn.cursor()
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# Add first tablet
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cursor.execute('''
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INSERT INTO tablets (brand, model, serial_number, status)
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VALUES (?, ?, ?, 'available')
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''', ('Brand1', 'Model1', 'DUP001'))
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db_conn.commit()
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# Try to add duplicate
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with pytest.raises(sqlite3.IntegrityError):
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cursor.execute('''
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INSERT INTO tablets (brand, model, serial_number, status)
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VALUES (?, ?, ?, 'available')
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''', ('Brand2', 'Model2', 'DUP001'))
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db_conn.commit()
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def test_tablet_status_update(self, db_conn):
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"""Test updating tablet status"""
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cursor = db_conn.cursor()
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# Add a tablet
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cursor.execute('''
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INSERT INTO tablets (brand, model, serial_number, status)
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VALUES (?, ?, ?, 'available')
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''', ('Brand', 'Model', 'STATUS001'))
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db_conn.commit()
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# Update status
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cursor.execute("UPDATE tablets SET status = 'loaned' WHERE serial_number = 'STATUS001'")
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db_conn.commit()
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# Verify update
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cursor.execute("SELECT status FROM tablets WHERE serial_number = 'STATUS001'")
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status = cursor.fetchone()['status']
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assert status == 'loaned'
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class TestUserOperations:
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"""Tests for user CRUD operations"""
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def test_add_user_success(self, db_conn):
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"""Test adding a new user successfully"""
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cursor = db_conn.cursor()
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cursor.execute('''
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INSERT INTO users (name, identification)
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VALUES (?, ?)
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''', ('Test User', 'TESTID001'))
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db_conn.commit()
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cursor.execute("SELECT * FROM users WHERE identification = 'TESTID001'")
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user = cursor.fetchone()
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assert user is not None
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assert user['name'] == 'Test User'
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assert user['identification'] == 'TESTID001'
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def test_add_user_duplicate_identification(self, db_conn):
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"""Test that duplicate user identifications are rejected"""
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cursor = db_conn.cursor()
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# Add first user
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cursor.execute('''
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INSERT INTO users (name, identification)
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VALUES (?, ?)
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''', ('User1', 'DUPID001'))
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db_conn.commit()
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# Try to add duplicate
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with pytest.raises(sqlite3.IntegrityError):
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cursor.execute('''
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INSERT INTO users (name, identification)
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VALUES (?, ?)
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''', ('User2', 'DUPID001'))
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db_conn.commit()
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def test_user_with_contact_info(self, db_conn):
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"""Test adding user with email and phone"""
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cursor = db_conn.cursor()
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cursor.execute('''
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INSERT INTO users (name, email, phone, identification)
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VALUES (?, ?, ?, ?)
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''', ('Contact User', 'test@email.com', '1234567890', 'CONTACT001'))
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db_conn.commit()
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cursor.execute("SELECT * FROM users WHERE identification = 'CONTACT001'")
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user = cursor.fetchone()
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assert user['email'] == 'test@email.com'
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assert user['phone'] == '1234567890'
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class TestLoanOperations:
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"""Tests for loan operations - the core business logic"""
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def test_loan_tablet_success(self, populated_db):
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"""Test loaning an available tablet to a user"""
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cursor = populated_db.cursor()
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# Get an available tablet and user
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cursor.execute("SELECT id FROM tablets WHERE status = 'available' LIMIT 1")
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tablet = cursor.fetchone()
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cursor.execute("SELECT id FROM users LIMIT 1")
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user = cursor.fetchone()
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assert tablet is not None
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assert user is not None
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tablet_id = tablet['id']
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user_id = user['id']
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# Loan the tablet
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loan_date = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
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cursor.execute("UPDATE tablets SET status = 'loaned' WHERE id = ?", (tablet_id,))
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cursor.execute('''
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INSERT INTO loans (tablet_id, user_id, loan_date, status)
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VALUES (?, ?, ?, 'active')
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''', (tablet_id, user_id, loan_date))
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populated_db.commit()
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# Verify tablet status changed
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cursor.execute("SELECT status FROM tablets WHERE id = ?", (tablet_id,))
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status = cursor.fetchone()['status']
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assert status == 'loaned'
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# Verify loan was created
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cursor.execute("SELECT * FROM loans WHERE tablet_id = ? AND user_id = ?", (tablet_id, user_id))
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loan = cursor.fetchone()
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assert loan is not None
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assert loan['status'] == 'active'
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assert loan['return_date'] is None
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def test_loan_already_loaned_tablet(self, populated_db):
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"""Test that loaning an already loaned tablet fails gracefully"""
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cursor = populated_db.cursor()
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# Get a loaned tablet (SN004 should be loaned from sample data)
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cursor.execute("SELECT id FROM tablets WHERE status = 'loaned' LIMIT 1")
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tablet = cursor.fetchone()
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cursor.execute("SELECT id FROM users LIMIT 1")
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user = cursor.fetchone()
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if tablet and user:
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tablet_id = tablet['id']
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user_id = user['id']
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# Try to loan it again (should check status first)
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cursor.execute("SELECT status FROM tablets WHERE id = ?", (tablet_id,))
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status = cursor.fetchone()['status']
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# This should be 'loaned', so we shouldn't be able to loan it
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assert status == 'loaned'
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# The application logic should prevent this
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# In the actual app, this would be checked before inserting
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# Here we verify the status is still loaned
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cursor.execute("SELECT status FROM tablets WHERE id = ?", (tablet_id,))
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final_status = cursor.fetchone()['status']
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assert final_status == 'loaned'
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def test_return_tablet_success(self, populated_db):
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"""Test returning a loaned tablet"""
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cursor = populated_db.cursor()
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# Get an active loan
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cursor.execute("SELECT * FROM loans WHERE status = 'active' LIMIT 1")
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loan = cursor.fetchone()
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if loan:
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loan_id = loan['id']
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tablet_id = loan['tablet_id']
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# Return the tablet
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return_date = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
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cursor.execute('''
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UPDATE loans SET status = 'returned', return_date = ? WHERE id = ?
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''', (return_date, loan_id))
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cursor.execute("UPDATE tablets SET status = 'available' WHERE id = ?", (tablet_id,))
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populated_db.commit()
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# Verify loan status changed
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cursor.execute("SELECT status, return_date FROM loans WHERE id = ?", (loan_id,))
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updated_loan = cursor.fetchone()
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assert updated_loan['status'] == 'returned'
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assert updated_loan['return_date'] is not None
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# Verify tablet status changed
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cursor.execute("SELECT status FROM tablets WHERE id = ?", (tablet_id,))
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tablet_status = cursor.fetchone()['status']
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assert tablet_status == 'available'
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def test_return_nonexistent_loan(self, db_conn):
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"""Test returning a loan that doesn't exist"""
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cursor = db_conn.cursor()
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# Try to return a non-existent loan
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cursor.execute("SELECT tablet_id FROM loans WHERE id = ? AND status = 'active'", (9999,))
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loan = cursor.fetchone()
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# Should be None since loan doesn't exist
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assert loan is None
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class TestEdgeCases:
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"""Tests for edge cases and error conditions"""
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def test_loan_to_nonexistent_user(self, db_conn):
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"""Test loaning to a user that doesn't exist"""
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cursor = db_conn.cursor()
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# Add a tablet
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cursor.execute('''
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INSERT INTO tablets (brand, model, serial_number, status)
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VALUES (?, ?, ?, 'available')
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''', ('Brand', 'Model', 'EDGE001'))
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db_conn.commit()
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cursor.execute("SELECT id FROM tablets WHERE serial_number = 'EDGE001'")
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tablet = cursor.fetchone()
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# Try to loan to non-existent user (ID 9999)
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# Note: SQLite doesn't enforce foreign keys by default unless we enable it
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# The application should validate this at the application level
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# For now, we verify that the user doesn't exist
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cursor.execute("SELECT id FROM users WHERE id = 9999")
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user = cursor.fetchone()
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assert user is None # User doesn't exist
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# In a real app with FK enforcement, this would raise IntegrityError
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# For SQLite without FK enforcement, we just verify the user check
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def test_loan_nonexistent_tablet(self, db_conn):
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"""Test loaning a tablet that doesn't exist"""
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cursor = db_conn.cursor()
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# Add a user
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cursor.execute('''
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INSERT INTO users (name, identification)
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VALUES (?, ?)
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''', ('Test User', 'EDGEID001'))
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db_conn.commit()
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cursor.execute("SELECT id FROM users WHERE identification = 'EDGEID001'")
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user = cursor.fetchone()
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# Try to loan non-existent tablet (ID 9999)
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# Note: SQLite doesn't enforce foreign keys by default unless we enable it
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# The application should validate this at the application level
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# For now, we verify that the tablet doesn't exist
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cursor.execute("SELECT id FROM tablets WHERE id = 9999")
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tablet_check = cursor.fetchone()
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assert tablet_check is None # Tablet doesn't exist
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# In a real app with FK enforcement, this would raise IntegrityError
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# For SQLite without FK enforcement, we just verify the tablet check
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def test_empty_database_operations(self, db_conn):
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"""Test operations on empty database"""
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cursor = db_conn.cursor()
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# Query empty tables
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cursor.execute("SELECT COUNT(*) FROM tablets")
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tablet_count = cursor.fetchone()[0]
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assert tablet_count == 0
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cursor.execute("SELECT COUNT(*) FROM users")
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user_count = cursor.fetchone()[0]
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assert user_count == 0
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cursor.execute("SELECT COUNT(*) FROM loans")
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loan_count = cursor.fetchone()[0]
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assert loan_count == 0
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def test_multiple_loans_same_user(self, db_conn):
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"""Test that one user can have multiple loans (one-to-many relationship)"""
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cursor = db_conn.cursor()
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# Add user
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cursor.execute('''
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INSERT INTO users (name, identification)
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VALUES (?, ?)
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''', ('MultiLoan User', 'MULTI001'))
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db_conn.commit()
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cursor.execute("SELECT id FROM users WHERE identification = 'MULTI001'")
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user = cursor.fetchone()
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# Add multiple tablets
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for i in range(3):
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cursor.execute('''
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INSERT INTO tablets (brand, model, serial_number, status)
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VALUES (?, ?, ?, 'available')
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''', (f'Brand{i}', f'Model{i}', f'MULTI{i:03d}'))
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db_conn.commit()
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# Loan all tablets to the same user
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cursor.execute("SELECT id FROM tablets WHERE serial_number LIKE 'MULTI%'")
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tablets = cursor.fetchall()
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loan_date = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
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for tablet in tablets:
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cursor.execute("UPDATE tablets SET status = 'loaned' WHERE id = ?", (tablet['id'],))
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cursor.execute('''
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INSERT INTO loans (tablet_id, user_id, loan_date, status)
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VALUES (?, ?, ?, 'active')
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''', (tablet['id'], user['id'], loan_date))
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db_conn.commit()
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# Verify user has multiple loans
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cursor.execute("SELECT COUNT(*) FROM loans WHERE user_id = ?", (user['id'],))
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loan_count = cursor.fetchone()[0]
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assert loan_count == 3
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||
|
|
def test_serial_number_uniqueness_across_tables(self, db_conn):
|
||
|
|
"""Test that serial numbers are unique within their respective tables"""
|
||
|
|
cursor = db_conn.cursor()
|
||
|
|
|
||
|
|
# Add tablet with serial number
|
||
|
|
cursor.execute('''
|
||
|
|
INSERT INTO tablets (brand, model, serial_number, status)
|
||
|
|
VALUES (?, ?, ?, 'available')
|
||
|
|
''', ('Brand', 'Model', 'UNIQUE001'))
|
||
|
|
db_conn.commit()
|
||
|
|
|
||
|
|
# Add non-loanable device with same serial number (should be allowed - different tables)
|
||
|
|
cursor.execute('''
|
||
|
|
INSERT INTO non_loanable_devices
|
||
|
|
(brand, model, serial_number, device_type, status)
|
||
|
|
VALUES (?, ?, ?, ?, 'available')
|
||
|
|
''', ('Brand', 'Model', 'UNIQUE001', 'projector'))
|
||
|
|
db_conn.commit()
|
||
|
|
|
||
|
|
# Both should exist (different tables)
|
||
|
|
cursor.execute("SELECT COUNT(*) FROM tablets WHERE serial_number = 'UNIQUE001'")
|
||
|
|
tablet_count = cursor.fetchone()[0]
|
||
|
|
cursor.execute("SELECT COUNT(*) FROM non_loanable_devices WHERE serial_number = 'UNIQUE001'")
|
||
|
|
device_count = cursor.fetchone()[0]
|
||
|
|
|
||
|
|
assert tablet_count == 1
|
||
|
|
assert device_count == 1
|
||
|
|
|
||
|
|
# But duplicate within same table should fail
|
||
|
|
with pytest.raises(sqlite3.IntegrityError):
|
||
|
|
cursor.execute('''
|
||
|
|
INSERT INTO tablets (brand, model, serial_number, status)
|
||
|
|
VALUES (?, ?, ?, 'available')
|
||
|
|
''', ('Brand2', 'Model2', 'UNIQUE001'))
|
||
|
|
db_conn.commit()
|
||
|
|
|
||
|
|
|
||
|
|
class TestQueryOperations:
|
||
|
|
"""Tests for query and filtering operations"""
|
||
|
|
|
||
|
|
def test_query_available_tablets(self, populated_db):
|
||
|
|
"""Test querying available tablets"""
|
||
|
|
cursor = populated_db.cursor()
|
||
|
|
|
||
|
|
cursor.execute("SELECT * FROM tablets WHERE status = 'available'")
|
||
|
|
available = cursor.fetchall()
|
||
|
|
|
||
|
|
# Should have at least the sample available tablets
|
||
|
|
assert len(available) >= 3 # SN001, SN002, SN003 from sample
|
||
|
|
|
||
|
|
def test_query_loaned_tablets(self, populated_db):
|
||
|
|
"""Test querying loaned tablets"""
|
||
|
|
cursor = populated_db.cursor()
|
||
|
|
|
||
|
|
cursor.execute("SELECT * FROM tablets WHERE status = 'loaned'")
|
||
|
|
loaned = cursor.fetchall()
|
||
|
|
|
||
|
|
# Should have at least SN004 from sample data
|
||
|
|
assert len(loaned) >= 1
|
||
|
|
|
||
|
|
def test_query_active_loans(self, populated_db):
|
||
|
|
"""Test querying active loans"""
|
||
|
|
cursor = populated_db.cursor()
|
||
|
|
|
||
|
|
cursor.execute("SELECT * FROM loans WHERE status = 'active'")
|
||
|
|
active = cursor.fetchall()
|
||
|
|
|
||
|
|
# Should have at least 1 active loan from sample
|
||
|
|
assert len(active) >= 1
|
||
|
|
|
||
|
|
def test_query_returned_loans(self, populated_db):
|
||
|
|
"""Test querying returned loans"""
|
||
|
|
cursor = populated_db.cursor()
|
||
|
|
|
||
|
|
cursor.execute("SELECT * FROM loans WHERE status = 'returned'")
|
||
|
|
returned = cursor.fetchall()
|
||
|
|
|
||
|
|
# Should have at least 1 returned loan from sample
|
||
|
|
assert len(returned) >= 1
|
||
|
|
|
||
|
|
def test_query_loans_by_user(self, populated_db):
|
||
|
|
"""Test querying loans by user"""
|
||
|
|
cursor = populated_db.cursor()
|
||
|
|
|
||
|
|
cursor.execute("SELECT id FROM users LIMIT 1")
|
||
|
|
user = cursor.fetchone()
|
||
|
|
|
||
|
|
if user:
|
||
|
|
cursor.execute("SELECT * FROM loans WHERE user_id = ?", (user['id'],))
|
||
|
|
loans = cursor.fetchall()
|
||
|
|
|
||
|
|
# User should have at least 0 loans
|
||
|
|
assert isinstance(loans, list)
|
||
|
|
|
||
|
|
def test_query_tablets_by_brand(self, populated_db):
|
||
|
|
"""Test querying tablets by brand"""
|
||
|
|
cursor = populated_db.cursor()
|
||
|
|
|
||
|
|
cursor.execute("SELECT * FROM tablets WHERE brand = 'Samsung'")
|
||
|
|
samsung = cursor.fetchall()
|
||
|
|
|
||
|
|
# Should find Samsung tablet from sample data
|
||
|
|
assert len(samsung) >= 1
|
||
|
|
assert samsung[0]['brand'] == 'Samsung'
|