[text] implement 'parse_query_list()'

test/test_text.py

@@ -413,6 +413,28 @@ class TestText(unittest.TestCase):
         for value in INVALID:
             self.assertEqual(f(value), {})
 
+    def test_parse_query_list(self, f=text.parse_query_list):
+        # standard usage
+        self.assertEqual(f(""), {})
+        self.assertEqual(f("foo=1"), {"foo": "1"})
+        self.assertEqual(f("foo=1&bar=2"), {"foo": "1", "bar": "2"})
+
+        # missing value
+        self.assertEqual(f("bar"), {})
+        self.assertEqual(f("foo=1&bar"), {"foo": "1"})
+        self.assertEqual(f("foo=1&bar&baz=3"), {"foo": "1", "baz": "3"})
+
+        # keys with identical names
+        self.assertEqual(f("foo=1&foo=2"), {"foo": ["1", "2"]})
+        self.assertEqual(
+            f("foo=1&bar=2&foo=3&bar=4&foo=5"),
+            {"foo": ["1", "3", "5"], "bar": ["2", "4"]},
+        )
+
+        # invalid arguments
+        for value in INVALID:
+            self.assertEqual(f(value), {})
+
     def test_parse_timestamp(self, f=text.parse_timestamp):
         null = util.datetime_utcfromtimestamp(0)
         value = util.datetime_utcfromtimestamp(1555816235)