# Tests for the dependency injection core
#
# Copyright (C) 2012  Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
# Public License for more details.  You should have received a copy of the
# GNU General Public License along with this program; if not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
# Red Hat Author(s): Martin Sivak <msivak@redhat.com>
#

from .core import *
import unittest

def method_to_inject():
    pass

class BareFuncEnableTestCase(unittest.TestCase):
    @inject(injected_func = str.lower)
    def method(self, arg):
        return injected_func(arg)
    
class BareFuncTestCase(unittest.TestCase):
    @inject(injected_func = str.lower)
    def method(self, arg):
        return injected_func(arg)

    @inject(injected_func = method)
    def method2(self, arg):
        return injected_func(self, arg)
    
    def test_bare_inject(self):
        """Tests the injection to plain methods."""
        self.assertEqual("a", self.method("A"))

    def test_double_inject(self):
        """Tests the injection to two plain methods."""
        self.assertEqual("a", self.method2("A"))

    def test_inject_global_tainting(self):
        """Tests whether the global namespace is clean
           after the injection is done."""
        global injected_func
        injected_func = None
        self.method("A")
        self.assertEqual(None, injected_func)
        
    
@inject(injected_func = str.lower)
class Test(object):
    """Test fixture for class injection."""
    @usesclassinject
    def method(self, arg):
        return injected_func(arg)

    
@inject(injected_func = str.lower)
class TestInit(object):
    """Test fixture for injection to __init__."""
    @usesclassinject
    def __init__(self, arg):
        self.value = injected_func(arg)


@inject(injected_func = str.lower)
class TestCallable(object):
    """Test fixture for callable classes."""
    @usesclassinject
    def __call__(self, arg):
        return injected_func(arg)

class TestCallableSingle(object):
    """Test fixture for callable classes with
       simple method injection."""
    @inject(injected_func = str.lower)
    def __call__(self, arg):
        return injected_func(arg)
    
class ClassDITestCase(unittest.TestCase):
    
    def test_class_inject(self):
        """Test injection to instance method."""
        obj = Test()
        self.assertEqual("a", obj.method("A"))

    def test_named_register(self):
        """Test injection to instance method."""
        Test.register(method_to_inject)

    def test_class_init_inject(self):
        """Test injection to class constructor."""
        obj = TestInit("A")
        self.assertEqual("a", obj.value)

    def test_callable_class(self):
        """Test class injection to callable class."""
        obj = TestCallable()
        self.assertEqual("a", obj("A"))
        
    def test_callable_class_single(self):
        """Test method injection to callable class."""
        obj = TestCallableSingle()
        self.assertEqual("a", obj("A"))
        
if __name__ == "__main__":
    unittest.main()