# Tests for schoolgrades module.
import unittest
from zope.component import getGlobalSiteManager
from zope.interface.verify import verifyObject, verifyClass
from zope.schema.interfaces import ConstraintNotSatisfied
from ikobacustom.pcn.customers.schoolgrades import (
    IResultEntry, IResultEntryField,
    ResultEntry, ResultEntryField,
    EXAM_SUBJECTS_DICT, EXAM_GRADES)


class ResultEntryTests(unittest.TestCase):

    def setUp(self):
        self.valid_subj = EXAM_SUBJECTS_DICT.keys()[0]
        self.valid_grade = EXAM_GRADES[0][0]
        return

    def tearDown(self):
        return

    def test_ifaces(self):
        # make sure we implement the promised interfaces.
        obj = ResultEntry()
        verifyObject(IResultEntry, obj)
        verifyClass(IResultEntry, ResultEntry)
        return

    def test_init(self):
        # we can pass initial values
        item1 = ResultEntry()
        item2 = ResultEntry(self.valid_subj, self.valid_grade)
        self.assertTrue(item1.subject is None)
        self.assertTrue(item1.grade is None)
        self.assertEqual(item2.subject, self.valid_subj)
        self.assertEqual(item2.grade, self.valid_grade)
        return

    def test_illegal_value(self):
        item = ResultEntry()
        self.assertRaises(
            ConstraintNotSatisfied, ResultEntry, 'invalid', 'invalid')
        self.assertRaises(
            ConstraintNotSatisfied, ResultEntry, 'invalid')
        self.assertRaises(
            ConstraintNotSatisfied, setattr, item, 'subject', 'blah')
        self.assertRaises(
            ConstraintNotSatisfied, setattr, item, 'grade', 'blah')
        return

    def test_to_string(self):
        # the string representation is handy for export
        item1 = ResultEntry()
        item2 = ResultEntry(self.valid_subj, self.valid_grade)
        self.assertEqual(item1.to_string(), u"(None, None)")
        self.assertEqual(item2.to_string(), u"('%s', '%s')" % (
            self.valid_subj, self.valid_grade))
        return

    def test_from_string(self):
        # we can create new result entries based on strings
        myinput = u"(u'%s',u'%s')" % (
            self.valid_subj, self.valid_grade)
        item1 = ResultEntry.from_string(myinput)
        item2 = ResultEntry.from_string(u"(u'',u'')")
        item3 = ResultEntry.from_string(u"(None, None)")
        self.assertEqual(item1.subject, self.valid_subj)
        self.assertEqual(item1.grade, self.valid_grade)
        self.assertTrue(item2.subject is None)
        self.assertTrue(item2.grade is None)
        self.assertTrue(item3.subject is None)
        self.assertTrue(item3.grade is None)
        return

    def test_eq(self):
        # we can compare equality of ResultEntry objects
        item1 = ResultEntry(self.valid_subj, self.valid_grade)
        item2 = ResultEntry(self.valid_subj, self.valid_grade)
        item3 = ResultEntry()
        item4 = ResultEntry()
        assert item1 is not item2
        assert item1 == item1
        assert item1 == item2
        assert item3 is not item4
        assert item3 == item4
        assert item1.__eq__(item2) is True
        assert item1.__eq__(item3) is False

    def test_ne(self):
        # we can also tell, which ResultEntries are _not_ equal
        item1 = ResultEntry(self.valid_subj, self.valid_grade)
        item2 = ResultEntry()
        assert item1 != item2
        assert item1.__ne__(item2) is True
        assert item1.__ne__(item1) is False


class ResultEntryFieldTests(unittest.TestCase):

    def test_ifaces(self):
        # make sure we implement the promised interfaces.
        obj = ResultEntryField()
        verifyObject(IResultEntryField, obj)
        verifyClass(IResultEntryField, ResultEntryField)
        return