# -*- coding: utf-8 -*- """ Created on Wed Jun 25 11:08:22 2014 @author: pietro """ try: from builtins import long except ImportError: # python3 long = int import os import sqlite3 import tempfile as tmp from string import ascii_letters, digits from random import choice import numpy as np from grass.gunittest.case import TestCase from grass.gunittest.main import test from grass.pygrass.vector.table import Table, get_path # dictionary that generate random data COL2VALS = {'INT': lambda n: np.random.randint(9, size=n), 'INTEGER': lambda n: np.random.randint(9, size=n), 'INTEGER PRIMARY KEY': lambda n: np.arange(1, n+1, dtype=long), 'REAL': lambda n: np.random.rand(n), 'TEXT': lambda n: np.array([randstr() for _ in range(n)])} def randstr(prefix='', suffix='', size=6, chars=ascii_letters + digits): """Return a random string of characters. :param prefix: string prefix, default: '' :type prefix: str :param suffix: string suffix, default: '' :type suffix: str :param size: number of random characters :type size: int :param chars: string containing the characters that will be used :type chars: str :returns: string """ return prefix + ''.join(choice(chars) for _ in range(size)) + suffix def get_table_random_values(nrows, columns): """Generate a random recarray respecting the columns definition. :param nrows: number of rows of the generated array :type nrows: int :param columns: list of tuple containing column name and type. :type columns: list of tuple :returns: numpy recarray """ vals, dtype = [], [] for cname, ctype in columns: if ctype not in COL2VALS: raise TypeError("Unknown column type %s for: %s" % (ctype, cname)) vals.append(COL2VALS[ctype](nrows)) dtype.append((cname, vals[-1].dtype.str)) return np.array([v for v in zip(*vals)], dtype=dtype) class DBconnection(object): """Define a class to share common methods between TestCase.""" path = os.path.join(tmp.gettempdir(), randstr(prefix='temp', suffix='.db')) connection = sqlite3.connect(get_path(path)) columns = [('cat', 'INTEGER PRIMARY KEY'), ('cint', 'INT'), ('creal', 'REAL'), ('ctxt', 'TEXT')] def create_table_instance(self, **kw): """Return a Table class instance :param **kw: keyword arguments of Table class without name and connection. :type **kw: key-word arguments :returns: Table instance """ self.tname = randstr(prefix='temp') return Table(name=self.tname, connection=self.connection, **kw) def create_empty_table(self, columns=None, **kw): """Create an empty table in the database and return Table class instance. :param columns: list of tuple containing the column names and types. :type columns: list of tuple :param **kw: keyword arguments of Table class without name and connection. :type **kw: key-word arguments :returns: Table instance """ columns = self.columns if columns is None else columns table = self.create_table_instance(**kw) table.create(columns) return table def create_not_empty_table(self, nrows=None, values=None, columns=None, **kw): """Create a not empty table in the database and return Table class instance. :param nrows: number of rows. :type nrows: list of tuple :param values: list of tuple containing the values for each row. :type values: list of tuple :param columns: list of tuple containing the column names and types. :type columns: list of tuple :param **kw: keyword arguments of Table class without name and connection. :type **kw: key-word arguments :returns: Table instance """ if nrows is None and values is None: msg = "Both parameters ``nrows`` ``values`` are empty" raise RuntimeError(msg) columns = self.columns if columns is None else columns values = (get_table_random_values(nrows, columns) if values is None else values) table = self.create_empty_table(columns=columns, **kw) table.insert(values, many=True) return table def setUp(self): """Create a not empty table instance""" self.table = self.create_not_empty_table(10) self.cols = self.table.columns def tearDown(self): """Remove the generated vector map, if exist""" self.table.drop(force=True) self.table = None self.cols = None class ColumnsTestCase(DBconnection, TestCase): def test_check_insert_update_str(self): """Check insert_str and update_str attribute of Columns are correct""" insert = 'INSERT INTO %s VALUES (?,?,?,?)' self.assertEqual(self.cols.insert_str, insert % self.tname) update = 'UPDATE %s SET cint=?,creal=?,ctxt=? WHERE cat=?;' self.assertEqual(self.cols.update_str, update % self.tname) class TableInsertTestCase(DBconnection, TestCase): def setUp(self): """Create a not empty table instance""" self.table = self.create_empty_table() self.cols = self.table.columns def tearDown(self): """Remove the generated vector map, if exist""" self.table.drop(force=True) self.table = None self.cols = None def test_insert(self): """Test Table.insert method""" cat = 1 vals = (cat, 1111, 0.1111, 'test') cur = self.connection.cursor() self.table.insert(vals, cursor=cur) sqlquery = "SELECT cat, cint, creal, ctxt FROM %s WHERE cat=%d" cur.execute(sqlquery % (self.tname, cat)) self.assertTupleEqual(vals, cur.fetchone()) def test_insert_many(self): """Test Table.insert method using many==True""" vals = [(1, 1111, 0.1111, 'test1'), (2, 2222, 0.2222, 'test2'), (3, 3333, 0.3333, 'test3')] cur = self.connection.cursor() self.table.insert(vals, cursor=cur, many=True) sqlquery = "SELECT cat, cint, creal, ctxt FROM %s" cur.execute(sqlquery % self.tname) self.assertListEqual(vals, cur.fetchall()) class TableUpdateTestCase(DBconnection, TestCase): def test_update(self): """Test Table.update method""" vals = (1122, 0.1122, 'test') cat = 1 cur = self.connection.cursor() self.table.update(cat, list(vals), cursor=cur) self.connection.commit() sqlquery = "SELECT cint, creal, ctxt FROM %s WHERE cat=%d" cur.execute(sqlquery % (self.tname, cat)) self.assertTupleEqual(vals, cur.fetchone()) if __name__ == '__main__': test()