1 files changed, 132 insertions, 0 deletions
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 00000000..96c5f997
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,132 @@
+from __future__ import unicode_literals
+from django.conf.urls import patterns, url
+from django.test import TestCase
+from django.utils import six
+from rest_framework.utils.model_meta import _resolve_model
+from rest_framework.utils.breadcrumbs import get_breadcrumbs
+from rest_framework.views import APIView
+from tests.models import BasicModel
+
+
+class Root(APIView):
+    pass
+
+
+class ResourceRoot(APIView):
+    pass
+
+
+class ResourceInstance(APIView):
+    pass
+
+
+class NestedResourceRoot(APIView):
+    pass
+
+
+class NestedResourceInstance(APIView):
+    pass
+
+
+urlpatterns = patterns(
+    '',
+    url(r'^$', Root.as_view()),
+    url(r'^resource/$', ResourceRoot.as_view()),
+    url(r'^resource/(?P<key>[0-9]+)$', ResourceInstance.as_view()),
+    url(r'^resource/(?P<key>[0-9]+)/$', NestedResourceRoot.as_view()),
+    url(r'^resource/(?P<key>[0-9]+)/(?P<other>[A-Za-z]+)$', NestedResourceInstance.as_view()),
+)
+
+
+class BreadcrumbTests(TestCase):
+    """
+    Tests the breadcrumb functionality used by the HTML renderer.
+    """
+    urls = 'tests.test_utils'
+
+    def test_root_breadcrumbs(self):
+        url = '/'
+        self.assertEqual(
+            get_breadcrumbs(url),
+            [('Root', '/')]
+        )
+
+    def test_resource_root_breadcrumbs(self):
+        url = '/resource/'
+        self.assertEqual(
+            get_breadcrumbs(url),
+            [
+                ('Root', '/'),
+                ('Resource Root', '/resource/')
+            ]
+        )
+
+    def test_resource_instance_breadcrumbs(self):
+        url = '/resource/123'
+        self.assertEqual(
+            get_breadcrumbs(url),
+            [
+                ('Root', '/'),
+                ('Resource Root', '/resource/'),
+                ('Resource Instance', '/resource/123')
+            ]
+        )
+
+    def test_nested_resource_breadcrumbs(self):
+        url = '/resource/123/'
+        self.assertEqual(
+            get_breadcrumbs(url),
+            [
+                ('Root', '/'),
+                ('Resource Root', '/resource/'),
+                ('Resource Instance', '/resource/123'),
+                ('Nested Resource Root', '/resource/123/')
+            ]
+        )
+
+    def test_nested_resource_instance_breadcrumbs(self):
+        url = '/resource/123/abc'
+        self.assertEqual(
+            get_breadcrumbs(url),
+            [
+                ('Root', '/'),
+                ('Resource Root', '/resource/'),
+                ('Resource Instance', '/resource/123'),
+                ('Nested Resource Root', '/resource/123/'),
+                ('Nested Resource Instance', '/resource/123/abc')
+            ]
+        )
+
+    def test_broken_url_breadcrumbs_handled_gracefully(self):
+        url = '/foobar'
+        self.assertEqual(
+            get_breadcrumbs(url),
+            [('Root', '/')]
+        )
+
+
+class ResolveModelTests(TestCase):
+    """
+    `_resolve_model` should return a Django model class given the
+    provided argument is a Django model class itself, or a properly
+    formatted string representation of one.
+    """
+    def test_resolve_django_model(self):
+        resolved_model = _resolve_model(BasicModel)
+        self.assertEqual(resolved_model, BasicModel)
+
+    def test_resolve_string_representation(self):
+        resolved_model = _resolve_model('tests.BasicModel')
+        self.assertEqual(resolved_model, BasicModel)
+
+    def test_resolve_unicode_representation(self):
+        resolved_model = _resolve_model(six.text_type('tests.BasicModel'))
+        self.assertEqual(resolved_model, BasicModel)
+
+    def test_resolve_non_django_model(self):
+        with self.assertRaises(ValueError):
+            _resolve_model(TestCase)
+
+    def test_resolve_improper_string_representation(self):
+        with self.assertRaises(ValueError):
+            _resolve_model('BasicModel')