test: update tests to support latest google-cloud-core (#23)

* test: update tests to support latest google-cloud-core

`google-cloud-core` version 1.4.2 populates `prettyPrint=false` by
default. Update the connection tests to expect a value for
`prettyPrint`.

tests/unit/test__http.py

@@ -28,9 +28,33 @@ def _make_one(self, *args, **kw):
         return self._get_target_class()(*args, **kw)
 
     def test_build_api_url_no_extra_query_params(self):
+        from six.moves.urllib.parse import parse_qsl
+        from six.moves.urllib.parse import urlsplit
+
         conn = self._make_one(object())
-        URI = "/".join([conn.API_BASE_URL, "dns", conn.API_VERSION, "foo"])
-        self.assertEqual(conn.build_api_url("/foo"), URI)
+        uri = conn.build_api_url("/foo")
+        scheme, netloc, path, qs, _ = urlsplit(uri)
+        self.assertEqual("%s://%s" % (scheme, netloc), conn.API_BASE_URL)
+        self.assertEqual(path, "/".join(["", "dns", conn.API_VERSION, "foo"]))
+        parms = dict(parse_qsl(qs))
+        pretty_print = parms.pop("prettyPrint", "false")
+        self.assertEqual(pretty_print, "false")
+        self.assertEqual(parms, {})
+
+    def test_build_api_url_w_custom_endpoint(self):
+        from six.moves.urllib.parse import parse_qsl
+        from six.moves.urllib.parse import urlsplit
+
+        custom_endpoint = "https://foo-dns.googleapis.com"
+        conn = self._make_one(object(), api_endpoint=custom_endpoint)
+        uri = conn.build_api_url("/foo")
+        scheme, netloc, path, qs, _ = urlsplit(uri)
+        self.assertEqual("%s://%s" % (scheme, netloc), custom_endpoint)
+        self.assertEqual(path, "/".join(["", "dns", conn.API_VERSION, "foo"]))
+        parms = dict(parse_qsl(qs))
+        pretty_print = parms.pop("prettyPrint", "false")
+        self.assertEqual(pretty_print, "false")
+        self.assertEqual(parms, {})
 
     def test_build_api_url_w_extra_query_params(self):
         from six.moves.urllib.parse import parse_qsl
@@ -44,12 +68,6 @@ def test_build_api_url_w_extra_query_params(self):
         parms = dict(parse_qsl(qs))
         self.assertEqual(parms["bar"], "baz")
 
-    def test_build_api_url_w_custom_endpoint(self):
-        custom_endpoint = "https://foo-dns.googleapis.com"
-        conn = self._make_one(object(), api_endpoint=custom_endpoint)
-        URI = "/".join([custom_endpoint, "dns", conn.API_VERSION, "foo"])
-        self.assertEqual(conn.build_api_url("/foo"), URI)
-
     def test_extra_headers(self):
         import requests
         from google.cloud import _http as base_http