config: Update remote URL handling.

luci_config/appengine/gaeconfig/settings_test.go

Index: luci_config/appengine/gaeconfig/settings_test.go
diff --git a/luci_config/appengine/gaeconfig/settings_test.go b/luci_config/appengine/gaeconfig/settings_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..654479c5cbc9c8cb900ffd8b94723ba5519e00f2
--- /dev/null
+++ b/luci_config/appengine/gaeconfig/settings_test.go
@@ -0,0 +1,56 @@
+// Copyright 2017 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package gaeconfig
+
+import (
+	"testing"
+
+	"github.com/luci/luci-go/server/settings"
+
+	"golang.org/x/net/context"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestSettingsURLToHostTranslation(t *testing.T) {
+	t.Parallel()
+
+	Convey(`A testing settings configuration`, t, func() {
+		c := context.Background()
+
+		memSettings := settings.MemoryStorage{}
+		c = settings.Use(c, settings.New(&memSettings))
+
+		Convey(`Loaded with a URL value in ConfigServiceHost`, func() {
+			s := Settings{
+				ConfigServiceHost: "https://example.com/foo/bar",
+			}
+			So(s.SetIfChanged(c, "test harness", "initial settings"), ShouldBeNil)
+
+			Convey(`Will load the setting as a host.`, func() {
+				s, err := FetchCachedSettings(c)
+				So(err, ShouldBeNil)
+				So(s, ShouldResemble, Settings{
+					ConfigServiceHost: "example.com",
+				})
+			})
+		})
+
+		Convey(`Loaded with a host value in ConfigServiceHost`, func() {
+			s := Settings{
+				ConfigServiceHost: "example.com",
+			}
+			So(s.SetIfChanged(c, "test harness", "initial settings"), ShouldBeNil)
+
+			Convey(`Will load the setting as a host.`, func() {
+				s, err := FetchCachedSettings(c)
+				So(err, ShouldBeNil)
+				So(s, ShouldResemble, Settings{
+					ConfigServiceHost: "example.com",
+				})
+			})
+		})
+	})
+}