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test.py
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test.py
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#!/usr/bin/env python
import unittest
from mock import Mock
if __name__ == '__main__':
import os
r = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
import sys
sys.path.insert(0, r)
from .parser import parser
from .lexer import PLYCompatLexer
from .exceptions import CompileException
from .environment import Environment
class TestBase(unittest.TestCase):
def run_code(self, i, namespace=None, debug=False):
if namespace is None:
namespace = {}
root = self.compile(i, debug=debug)
root.evaluate(namespace)
return namespace
def compile(self, code, debug=False):
return parser.parse(code, lexer=PLYCompatLexer(debug=debug))
class TestAssignment(TestBase):
def test_assignment(self):
n = self.run_code('''a=1\nb=1''')
self.assertEqual(n, {'a': 1, 'b': 1})
def test_repeated_assignment(self):
n = self.run_code('''a=1\na=2''')
self.assertEqual(n, {'a': 2})
def test_transitive_assignment(self):
n = self.run_code('''a=3\nb=a''')
self.assertEqual(n, {'a': 3, 'b': 3})
def test_additive_assignment(self):
n = self.run_code('''a=1\na+=2''')
self.assertEqual(n, {'a': 3})
def test_substractive_assignment(self):
n = self.run_code('''a=1\na-=2''')
self.assertEqual(n, {'a': -1})
def test_multiplicative_assignment(self):
n = self.run_code('''a=2\na*=2''')
self.assertEqual(n, {'a': 4})
def test_division_assignment(self):
n = self.run_code('''a=8\na/=2''')
self.assertEqual(n, {'a': 4})
class TestIf(TestBase):
def test_if_false(self):
n = self.run_code('''if 0\n a=1''')
self.assertEqual(n, {})
def test_if_true(self):
n = self.run_code('''if 1\n a=1''')
self.assertEqual(n, {'a': 1})
def test_nested_if(self):
n = self.run_code('''if 1\n if 1\n a=1''')
self.assertEqual(n, {'a': 1})
def test_nested_if_false(self):
n = self.run_code('''if 0\n if 1\n a=1''')
n = self.run_code('''if 1\n if 0\n a=1''', n)
self.assertEqual(n, {})
class TestStatements(TestBase):
def test_multiple_newlines(self):
n = self.run_code('''a=1\n\nb=2''')
self.assertEqual(n, {'a': 1, 'b': 2})
def test_print_number(self):
env = Environment()
env.stdout = Mock()
n = self.run_code('''print 1''', env)
self.assertEqual(n, env)
env.stdout.assert_called_with(1)
def test_print_variable(self):
env = Environment()
env.stdout = Mock()
n = self.run_code('''a=1\nprint a''', env)
self.assertEqual(n, env)
env.stdout.assert_called_with(1)
def test_print_string(self):
env = Environment()
env.stdout = Mock()
n = self.run_code('''print "test"''', env)
self.assertEqual(n, env)
env.stdout.assert_called_with("test")
class TestPartialParsing(unittest.TestCase):
def test_partial_none(self):
i = '''if 1'''
root = parser.parse(i, lexer=PLYCompatLexer())
self.assertIsNone(root)
def test_partial_none2(self):
i = '''if 1\n a=1'''
root = parser.parse(i, lexer=PLYCompatLexer(auto_end=False))
self.assertIsNone(root)
def test_partial_ok(self):
i = '''if 1\n a=1\nnop'''
root = parser.parse(i, lexer=PLYCompatLexer(auto_end=False))
n = {}
root.evaluate(n)
self.assertEqual(n, {'a': 1})
def test_partial_fail3(self):
i = '''if 1=\n a=1'''
with self.assertRaises(CompileException):
parser.parse(i, lexer=PLYCompatLexer(auto_end=False))
class TestMath(TestBase):
def test_addition(self):
n = self.run_code('''a=1+1''')
self.assertEqual(n, {'a': 2})
def test_subtraction(self):
n = self.run_code('''a=2-1''')
self.assertEqual(n, {'a': 1})
def test_multiplication(self):
n = self.run_code('''a=2*3''')
self.assertEqual(n, {'a': 6})
def test_division(self):
n = self.run_code('''a=8/2''')
self.assertEqual(n, {'a': 4})
def test_multiplication_before_addition(self):
n = self.run_code('''a=2+2*5''')
self.assertEqual(n, {'a': 12})
def test_paren(self):
n = self.run_code('''a=(2+2)*5''')
self.assertEqual(n, {'a': 20})
def test_increment(self):
n = self.run_code('''a=1\na=a+1''')
self.assertEqual(n, {'a': 2})
class TestEnvironment(unittest.TestCase):
def setUp(self):
self.e = Environment()
def test_simple(self):
self.e['a'] = 1
self.assertEqual(self.e['a'], 1)
def test_overwrite(self):
self.e['a'] = 1
self.e['a'] = 2
self.assertEqual(self.e['a'], 2)
def test_undefined(self):
with self.assertRaises(KeyError):
self.e['b']
def test_stack(self):
self.e.push_stacklevel()
self.e['a'] = 3
self.assertEqual(self.e['a'], 3)
self.e.pop_stacklevel()
with self.assertRaises(KeyError):
self.e['a']
def test_stack_top_level(self):
self.e['b'] = 1
self.e.push_stacklevel()
self.e.set_local_key('b', 2)
self.assertEqual(self.e['b'], 2)
self.e.pop_stacklevel()
self.assertEqual(self.e['b'], 1)
def test_stack_not_top_level(self):
self.e['b'] = 1
self.e.push_stacklevel()
self.e['b'] = 2
self.assertEqual(self.e['b'], 2)
self.e.pop_stacklevel()
self.assertEqual(self.e['b'], 2)
def test_global_read(self):
o = Mock()
o.__getitem__ = Mock(return_value=3)
o.__setitem__ = Mock()
self.e.register_global('test', o)
self.assertEqual(self.e['test'][1], 3)
o.__getitem__.assert_called_once()
self.e['test'][1] = 3
o.__setitem__.assert_called_with(1, 3)
self.assertEqual(self.e, Environment())
class TestEnvironmentWithParser(TestBase):
def test_flat(self):
n = self.run_code('''a=1''', Environment())
self.assertEqual(n, Environment([{'a': 1}]))
def test_assignment_variables(self):
n = self.run_code('''a=1\nb=a''', Environment())
self.assertEqual(n, Environment([{'a': 1, 'b': 1}]))
def test_stacked(self):
n = self.run_code('''c=0\nfor a in b\n c=c+1''', Environment([{'b': [1, 2, 3]}]))
self.assertEqual(n, Environment([{'b': [1, 2, 3], 'c': 3}]))
class TestForloop(TestBase):
def test_list_inline(self):
n = self.run_code('''a=0\nfor i in [1,2,3]\n a=a+i''', Environment())
self.assertEqual(n, Environment([{'a': 6}]))
def test_list_from_variable(self):
n = self.run_code('''a=0\nb=[2,3]\nfor i in b\n a=a+i''', Environment())
self.assertEqual(n, Environment([{'a': 5, 'b': [2, 3]}]))
class TestListsAndDicts(TestBase):
def test_list_part_read(self):
n = self.run_code('''a=[1,2,3]\nb=a[0]''')
self.assertEqual(n, {'a': [1, 2, 3], 'b': 1})
def test_list_part_write(self):
n = self.run_code('''a=[1,2,3]\na[0]=5''')
self.assertEqual(n, {'a': [5, 2, 3]})
def test_dict_part_read(self):
n = self.run_code('''b=a["test"]''', Environment([{'a': {'test': 1}}]))
self.assertEqual(n, Environment([{'a': {'test': 1}, 'b': 1}]))
def test_dict_part_write(self):
n = self.run_code('''a["foo"] = 3''', Environment([{'a': {}}]))
self.assertEqual(n, Environment([{'a': {'foo': 3}}]))
def test_dict_alt_read(self):
n = self.run_code('''b=a.test''', Environment([{'a': {'test': 1}}]))
self.assertEqual(n, Environment([{'a': {'test': 1}, 'b': 1}]))
def test_dict_alt_write(self):
n = self.run_code('''a.foo = 3''', Environment([{'a': {}}]))
self.assertEqual(n, Environment([{'a': {'foo': 3}}]))
class TestFunctions(TestBase):
def test_simple_call(self):
e = Environment()
e.register_global('testfun', lambda x, y: x + y)
n = self.run_code('''b=testfun(1, 1)''', e)
self.assertEqual(n, Environment([{'b': 2}]))
class TestErrorMessages(TestBase):
def run_code_and_catch_errors(self, code):
env = Environment()
env.stdout = Mock()
env.stderr = Mock()
return self.run_code(code, env)
def read_on_undefined_variable(self):
n = self.run_code_and_catch_errors('''b=a''')
n.stderr.assert_called_once()
if __name__ == '__main__':
unittest.main()