def test_will_import_basic():
i = ImportRedirector('foobar4', 'foobar4_%s')
i.import_func = MagicMock(side_effect=sys_modules_side_effect)
mod = i.load_module('foobar4.another')
i.import_func.assert_called_with('foobar4_another')
assert mod is sys.modules['foobar4.another']
assert mod is sys.modules['foobar4_another']
assert mod is i.module.another
def test_will_import_from_regular_when_builtins_fail():
i = ImportRedirector('foobar6', 'foobar6_%s', builtins='foobar6.builtins')
i.import_func = MagicMock(side_effect=sys_modules_side_effect)
mod = i.load_module('foobar6.another')
i.import_func.assert_called_once_with('foobar6.builtins.another')
assert mod is sys.modules['foobar6.another']
assert mod is sys.modules['foobar6.builtins.another']
assert mod is i.module.another
def test_will_return_existing():
i = ImportRedirector('foobar3', 'foobar3_%s')
m = i.load_module('sys')
assert m is sys
