some translation stuff
[wolnelektury.git] / apps / modeltranslation / tests.py
diff --git a/apps/modeltranslation/tests.py b/apps/modeltranslation/tests.py
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index 0000000..3e0f39b
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+# -*- coding: utf-8 -*-
+from django.conf import settings
+from django.contrib.auth.models import User
+from django.contrib.contenttypes.models import ContentType
+from django.db import models
+from django.test import TestCase
+from django.utils.thread_support import currentThread
+from django.utils.translation import get_language
+from django.utils.translation import trans_real
+
+# TODO: tests for TranslationAdmin
+
+from modeltranslation import translator
+
+settings.LANGUAGES = (('de', 'Deutsch'),
+                      ('en', 'English'))
+
+
+class TestModel(models.Model):
+    title = models.CharField(max_length=255)
+    text = models.TextField(null=True)
+
+
+class TestTranslationOptions(translator.TranslationOptions):
+    fields = ('title', 'text',)
+
+
+translator.translator._registry = {}
+translator.translator.register(TestModel, TestTranslationOptions)
+
+
+class ModelTranslationTest(TestCase):
+    """Basic tests for the modeltranslation application."""
+    urls = 'modeltranslation.testurls'
+
+    def setUp(self):
+        trans_real.activate("de")
+
+    def tearDown(self):
+        trans_real.deactivate()
+
+    def test_registration(self):
+        self.client.post('/set_language/', data={'language': 'de'})
+        #self.client.session['django_language'] = 'de-de'
+        #self.client.cookies[settings.LANGUAGE_COOKIE_NAME] = 'de-de'
+
+        langs = tuple(l[0] for l in settings.LANGUAGES)
+        self.failUnlessEqual(2, len(langs))
+        self.failUnless('de' in langs)
+        self.failUnless('en' in langs)
+        self.failUnless(translator.translator)
+
+        # Check that only one model is registered for translation
+        self.failUnlessEqual(len(translator.translator._registry), 1)
+
+        # Try to unregister a model that is not registered
+        self.assertRaises(translator.NotRegistered,
+                          translator.translator.unregister, User)
+
+        # Try to get options for a model that is not registered
+        self.assertRaises(translator.NotRegistered,
+                          translator.translator.get_options_for_model, User)
+
+    def test_translated_models(self):
+        # First create an instance of the test model to play with
+        inst = TestModel.objects.create(title="Testtitle", text="Testtext")
+        field_names = dir(inst)
+        self.failUnless('id' in field_names)
+        self.failUnless('title' in field_names)
+        self.failUnless('text' in field_names)
+        self.failUnless('title_de' in field_names)
+        self.failUnless('title_en' in field_names)
+        self.failUnless('text_de' in field_names)
+        self.failUnless('text_en' in field_names)
+
+        inst.delete()
+
+    def test_set_translation(self):
+        self.failUnlessEqual(get_language(), "de")
+        # First create an instance of the test model to play with
+        title1_de = "title de"
+        title1_en = "title en"
+        title2_de = "title2 de"
+        inst1 = TestModel(title_en=title1_en, text="Testtext")
+        inst1.title = title1_de
+        inst2 = TestModel(title=title2_de, text="Testtext")
+        inst1.save()
+        inst2.save()
+
+        self.failUnlessEqual(inst1.title, title1_de)
+        self.failUnlessEqual(inst1.title_en, title1_en)
+
+        self.failUnlessEqual(inst2.title, title2_de)
+        self.failUnlessEqual(inst2.title_en, None)
+
+        del inst1
+        del inst2
+
+        # Check that the translation fields are correctly saved and provide the
+        # correct value when retrieving them again.
+        n = TestModel.objects.get(title=title1_de)
+        self.failUnlessEqual(n.title, title1_de)
+        self.failUnlessEqual(n.title_en, title1_en)
+
+    def test_titleonly(self):
+        title1_de = "title de"
+        n = TestModel.objects.create(title=title1_de)
+        self.failUnlessEqual(n.title, title1_de)
+        # Because the original field "title" was specified in the constructor
+        # it is directly passed into the instance's __dict__ and the descriptor
+        # which updates the associated default translation field is not called
+        # and the default translation will be None.
+        self.failUnlessEqual(n.title_de, None)
+        self.failUnlessEqual(n.title_en, None)
+
+        # Now assign the title, that triggers the descriptor and the default
+        # translation field is updated
+        n.title = title1_de
+        self.failUnlessEqual(n.title, title1_de)
+        self.failUnlessEqual(n.title_de, title1_de)
+        self.failUnlessEqual(n.title_en, None)
+
+    def test_rule1(self):
+        """
+        Rule 1: Reading the value from the original field returns the value in
+        translated to the current language.
+        """
+        title1_de = "title de"
+        title1_en = "title en"
+        text_de = "Dies ist ein deutscher Satz"
+        text_en = "This is an english sentence"
+
+        # Test 1.
+        n = TestModel.objects.create(title_de=title1_de, title_en=title1_en,
+                                     text_de=text_de, text_en=text_en)
+        n.save()
+
+        # language is set to "de" at this point
+        self.failUnlessEqual(get_language(), "de")
+        self.failUnlessEqual(n.title, title1_de)
+        self.failUnlessEqual(n.title_de, title1_de)
+        self.failUnlessEqual(n.title_en, title1_en)
+        self.failUnlessEqual(n.text, text_de)
+        self.failUnlessEqual(n.text_de, text_de)
+        self.failUnlessEqual(n.text_en, text_en)
+        # Now switch to "en"
+        trans_real.activate("en")
+        self.failUnlessEqual(get_language(), "en")
+        # Title should now be return the english one (just by switching the
+        # language)
+        self.failUnlessEqual(n.title, title1_en)
+        self.failUnlessEqual(n.text, text_en)
+
+        n = TestModel.objects.create(title_de=title1_de, title_en=title1_en,
+                                     text_de=text_de, text_en=text_en)
+        n.save()
+        # language is set to "en" at this point
+        self.failUnlessEqual(n.title, title1_en)
+        self.failUnlessEqual(n.title_de, title1_de)
+        self.failUnlessEqual(n.title_en, title1_en)
+        self.failUnlessEqual(n.text, text_en)
+        self.failUnlessEqual(n.text_de, text_de)
+        self.failUnlessEqual(n.text_en, text_en)
+        trans_real.activate("de")
+        self.failUnlessEqual(get_language(), "de")
+        self.failUnlessEqual(n.title, title1_de)
+        self.failUnlessEqual(n.text, text_de)
+        trans_real.deactivate()
+
+    def test_rule2(self):
+        """
+        Rule 2: Assigning a value to the original field also updates the value
+        in the associated translation field of the default language
+        """
+        self.failUnlessEqual(get_language(), "de")
+        title1_de = "title de"
+        title1_en = "title en"
+        n = TestModel.objects.create(title_de=title1_de, title_en=title1_en)
+        self.failUnlessEqual(n.title, title1_de)
+        self.failUnlessEqual(n.title_de, title1_de)
+        self.failUnlessEqual(n.title_en, title1_en)
+
+        title2 = "Neuer Titel"
+        n.title = title2
+        n.save()
+        self.failUnlessEqual(n.title, title2)
+        self.failUnlessEqual(n.title, n.title_de)
+
+        trans_real.activate("en")
+        self.failUnlessEqual(get_language(), "en")
+        title3 = "new title"
+
+        n.title = title3
+        n.title_de = title1_de
+        n.save()
+        self.failUnlessEqual(n.title, title3)
+        self.failUnlessEqual(n.title, n.title_en)
+        self.failUnlessEqual(title1_de, n.title_de)
+
+        trans_real.deactivate()
+
+    def test_rule3(self):
+        """
+        Rule 3: Assigning a value to a translation field of the default
+        language also updates the original field - note that the value of the
+        original field will not be updated until the model instance is saved.
+        """
+        title1_de = "title de"
+        title1_en = "title en"
+        n = TestModel.objects.create(title_de=title1_de, title_en=title1_en)
+        self.failUnlessEqual(get_language(), "de")
+        self.failUnlessEqual(n.title, title1_de)
+        self.failUnlessEqual(n.title_de, title1_de)
+        self.failUnlessEqual(n.title_en, title1_en)
+
+        n.title_de = "Neuer Titel"
+        n.save()
+        self.failUnlessEqual(n.title, n.title_de)
+
+        # Now switch to "en"
+        trans_real.activate("en")
+        self.failUnlessEqual(get_language(), "en")
+        n.title_en = "New title"
+        # the n.title field is not updated before the instance is saved
+        n.save()
+        self.failUnlessEqual(n.title, n.title_en)
+        trans_real.deactivate()
+
+    def test_rule4(self):
+        """
+        Rule 4: If both fields - the original and the translation field of the
+        default language - are updated at the same time, the translation field
+        wins.
+        """
+        self.failUnlessEqual(get_language(), "de")
+        title1_de = "title de"
+        title1_en = "title en"
+        n = TestModel.objects.create(title_de=title1_de, title_en=title1_en)
+        self.failUnlessEqual(n.title, title1_de)
+        self.failUnlessEqual(n.title_de, title1_de)
+        self.failUnlessEqual(n.title_en, title1_en)
+
+        title2_de = "neu de"
+        title2_en = "new en"
+        title_foo = "foo"
+        n.title = title_foo
+        n.title_de = title2_de
+        n.title_en = title2_en
+        n.save()
+        self.failUnlessEqual(n.title, title2_de)
+        self.failUnlessEqual(n.title_de, title2_de)
+        self.failUnlessEqual(n.title_en, title2_en)
+
+        n.title = title_foo
+        n.save()
+        self.failUnlessEqual(n.title, title_foo)
+        self.failUnlessEqual(n.title_de, title_foo)
+        self.failUnlessEqual(n.title_en, title2_en)