i18n now has support for ngettext and has unittests

git-svn-id: http://code.djangoproject.com/svn/django/branches/i18n@755 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/defaulttags.py

@@ -291,22 +291,31 @@ class I18NNode(template.Node):
     def __init__(self, cmd):
         self.cmd = cmd
         self.i18n_re = re.compile(r'^\s*_\((.*)\)\s*$')
+        self.ngettext_re = re.compile(r'''^\s*ngettext\(((?:".+")|(?:'.+')|(?:""".+"""))\s*,\s*((?:".+")|(?:'.+')|(?:""".+"""))\s*,\s*(.*)\)\s*$''')
+
+    def _resolve_var(self, s, context):
+        if s.startswith("'") and s.endswith("'"):
+            s = s[1:-1]
+        elif s.startswith('"""') and s.endswith('"""'):
+            s = s[3:-3]
+        elif s.startswith('"') and s.endswith('"'):
+            s = s[1:-1]
+        else:
+            s = template.resolve_variable_with_filters(s, context)
+        return s
 
     def render(self, context):
         m = self.i18n_re.match(self.cmd)
         if m:
-            s = m.group(1)
-            if s.startswith("'") and s.endswith("'"):
-                s = s[1:-1]
-            elif s.startswith('"""') and s.endswith('"""'):
-                s = s[3:-3]
-            elif s.startswith('"') and s.endswith('"'):
-                s = s[1:-1]
-            else:
-                s = template.resolve_variable_with_filters(s, context)
+            s = self._resolve_var(m.group(1), context)
             return translation.gettext(s) % context
-        else:
-            raise template.TemplateSyntaxError("i18n must be called as {% i18n _('some message') %}")
+        m = self.ngettext_re.match(self.cmd)
+        if m:
+            singular = self._resolve_var(m.group(1), context)
+            plural = self._resolve_var(m.group(2), context)
+            var = template.resolve_variable_with_filters(m.group(3), context)
+            return translation.ngettext(singular, plural, var) % context
+        raise template.TemplateSyntaxError("i18n must be called as {% i18n _('some message') %} or {% i18n ngettext('singular', 'plural', var) %}")
 
 def do_comment(parser, token):
     """
@@ -778,6 +787,7 @@ def do_i18n(parser, token):
     For example::
 
         {% i18n _('test') %}
+        {% i18n ngettext('singular', 'plural', counter) %}
 
     """
     args = token.contents.split(' ', 1)

django/utils/translation.py

@@ -149,6 +149,14 @@ def gettext_noop(message):
     """
     return message
 
+def ngettext(singular, plural, number):
+    """
+    This function returns the translation of either the singular
+    or plural, based on the number.
+    """
+    if number == 1: return gettext(singular)
+    else: return gettext(plural)
+
 def get_language_from_request(request):
     """
     analyze the request to find what language the user

tests/othertests/templates.py

@@ -1,4 +1,5 @@
 from django.core import template, template_loader
+from django.utils.translation import activate, deactivate
 
 # Helper objects for template tests
 class SomeClass:
@@ -210,6 +211,33 @@ TEMPLATE_TESTS = {
 
     # Raise exception for custom tags used in child with {% load %} tag in parent, not in child
     'exception04': ("{% extends 'inheritance17' %}{% block first %}{% echo 400 %}5678{% endblock %}", {}, template.TemplateSyntaxError),
+
+    # simple translation of a string delimited by '
+    'i18n01': ("{% i18n _('xxxyyyxxx') %}", {}, "xxxyyyxxx"),
+
+    # simple translation of a string delimited by "
+    'i18n02': ('{% i18n _("xxxyyyxxx") %}', {}, "xxxyyyxxx"),
+
+    # simple translation of a string delimited by """
+    'i18n03': ('{% i18n _("""xxxyyyxxx""") %}', {}, "xxxyyyxxx"),
+
+    # simple translation of a variable
+    'i18n04': ('{% i18n _(anton) %}', {'anton': 'xxxyyyxxx'}, "xxxyyyxxx"),
+
+    # simple translation of a variable
+    'i18n05': ('{% i18n _(anton|lower) %}', {'anton': 'XXXYYYXXX'}, "xxxyyyxxx"),
+
+    # simple translation of a string with interpolation
+    'i18n05': ('{% i18n _("xxx%(anton)sxxx") %}', {'anton': 'yyy'}, "xxxyyyxxx"),
+
+    # simple translation of a string to german
+    'i18n07': ('{% i18n _("Page not found") %}', {'LANGUAGE_CODE': 'de'}, "Seite nicht gefunden"),
+
+    # translation of singular form
+    'i18n08': ('{% i18n ngettext("singular", "plural", count) %}', {'count': 1}, "singular"),
+
+    # translation of plural form
+    'i18n09': ('{% i18n ngettext("singular", "plural", count) %}', {'count': 2}, "plural"),
 }
 
 # This replaces the standard template_loader.
@@ -225,6 +253,8 @@ def run_tests(verbosity=0, standalone=False):
     tests = TEMPLATE_TESTS.items()
     tests.sort()
     for name, vals in tests:
+        if 'LANGUAGE_CODE' in vals[1]:
+            activate('*', vals[1]['LANGUAGE_CODE'])
         try:
             output = template_loader.get_template(name).render(template.Context(vals[1]))
         except Exception, e:
@@ -236,6 +266,8 @@ def run_tests(verbosity=0, standalone=False):
                     print "Template test: %s -- FAILED. Got %s, exception: %s" % (name, e.__class__, e)
                 failed_tests.append(name)
             continue
+        if 'LANGUAGE_CODE' in vals[1]:
+            deactivate()
         if output == vals[2]:
             if verbosity:
                 print "Template test: %s -- Passed" % name