1 files changed, 100 insertions, 0 deletions

diff --git a/tests/template_tests/syntax_tests/test_query_string.py b/tests/template_tests/syntax_tests/test_query_string.py
new file mode 100644
index 0000000000..13c0dc1d08
--- /dev/null
+++ b/tests/template_tests/syntax_tests/test_query_string.py
@@ -0,0 +1,100 @@
+from django.http import QueryDict
+from django.template import RequestContext
+from django.test import RequestFactory, SimpleTestCase
+
+from ..utils import setup
+
+
+class QueryStringTagTests(SimpleTestCase):
+    def setUp(self):
+        self.request_factory = RequestFactory()
+
+    @setup({"query_string_empty": "{% query_string %}"})
+    def test_query_string_empty(self):
+        request = self.request_factory.get("/")
+        template = self.engine.get_template("query_string_empty")
+        context = RequestContext(request)
+        output = template.render(context)
+        self.assertEqual(output, "")
+
+    @setup({"query_string_non_empty": "{% query_string %}"})
+    def test_query_string_non_empty(self):
+        request = self.request_factory.get("/", {"a": "b"})
+        template = self.engine.get_template("query_string_non_empty")
+        context = RequestContext(request)
+        output = template.render(context)
+        self.assertEqual(output, "?a=b")
+
+    @setup({"query_string_multiple": "{% query_string %}"})
+    def test_query_string_multiple(self):
+        request = self.request_factory.get("/", {"x": "y", "a": "b"})
+        template = self.engine.get_template("query_string_multiple")
+        context = RequestContext(request)
+        output = template.render(context)
+        self.assertEqual(output, "?x=y&a=b")
+
+    @setup({"query_string_replace": "{% query_string a=1 %}"})
+    def test_query_string_replace(self):
+        request = self.request_factory.get("/", {"x": "y", "a": "b"})
+        template = self.engine.get_template("query_string_replace")
+        context = RequestContext(request)
+        output = template.render(context)
+        self.assertEqual(output, "?x=y&a=1")
+
+    @setup({"query_string_add": "{% query_string test_new='something' %}"})
+    def test_query_string_add(self):
+        request = self.request_factory.get("/", {"a": "b"})
+        template = self.engine.get_template("query_string_add")
+        context = RequestContext(request)
+        output = template.render(context)
+        self.assertEqual(output, "?a=b&test_new=something")
+
+    @setup({"query_string_remove": "{% query_string test=None a=1 %}"})
+    def test_query_string_remove(self):
+        request = self.request_factory.get("/", {"test": "value", "a": "1"})
+        template = self.engine.get_template("query_string_remove")
+        context = RequestContext(request)
+        output = template.render(context)
+        self.assertEqual(output, "?a=1")
+
+    @setup(
+        {"query_string_remove_nonexistent": "{% query_string nonexistent=None a=1 %}"}
+    )
+    def test_query_string_remove_nonexistent(self):
+        request = self.request_factory.get("/", {"x": "y", "a": "1"})
+        template = self.engine.get_template("query_string_remove_nonexistent")
+        context = RequestContext(request)
+        output = template.render(context)
+        self.assertEqual(output, "?x=y&a=1")
+
+    @setup({"query_string_list": "{% query_string a=my_list %}"})
+    def test_query_string_add_list(self):
+        request = self.request_factory.get("/")
+        template = self.engine.get_template("query_string_list")
+        context = RequestContext(request, {"my_list": [2, 3]})
+        output = template.render(context)
+        self.assertEqual(output, "?a=2&a=3")
+
+    @setup({"query_string_query_dict": "{% query_string request.GET a=2 %}"})
+    def test_query_string_with_explicit_query_dict(self):
+        request = self.request_factory.get("/", {"a": 1})
+        output = self.engine.render_to_string(
+            "query_string_query_dict", {"request": request}
+        )
+        self.assertEqual(output, "?a=2")
+
+    @setup(
+        {"query_string_query_dict_no_request": "{% query_string my_query_dict a=2 %}"}
+    )
+    def test_query_string_with_explicit_query_dict_and_no_request(self):
+        context = {"my_query_dict": QueryDict("a=1&b=2")}
+        output = self.engine.render_to_string(
+            "query_string_query_dict_no_request", context
+        )
+        self.assertEqual(output, "?a=2&b=2")
+
+    @setup({"query_string_no_request_no_query_dict": "{% query_string %}"})
+    def test_query_string_without_request_or_explicit_query_dict(self):
+        msg = "'Context' object has no attribute 'request'"
+        with self.assertRaisesMessage(AttributeError, msg):
+            self.engine.render_to_string("query_string_no_request_no_query_dict")