feat(app routes): worked on app routes, added unit test, changed Grafana-Context header to start with X to be standard compliant, got cloud saas queries to work via app route feature and header template

pkg/api/pluginproxy/pluginproxy_test.go

@@ -0,0 +1,42 @@
+package pluginproxy
+
+import (
+	"testing"
+
+	"github.com/grafana/grafana/pkg/bus"
+	m "github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/plugins"
+	"github.com/grafana/grafana/pkg/setting"
+	"github.com/grafana/grafana/pkg/util"
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestPluginProxy(t *testing.T) {
+
+	Convey("When getting proxy headers", t, func() {
+		route := &plugins.AppPluginRoute{
+			Headers: []plugins.AppPluginRouteHeader{
+				{Name: "x-header", Content: "my secret {{.SecureJsonData.key}}"},
+			},
+		}
+
+		setting.SecretKey = "password"
+
+		bus.AddHandler("test", func(query *m.GetAppSettingByAppIdQuery) error {
+			query.Result = &m.AppSettings{
+				SecureJsonData: map[string][]byte{
+					"key": util.Encrypt([]byte("123"), "password"),
+				},
+			}
+			return nil
+		})
+
+		header, err := getHeaders(route, 1, "my-app")
+		So(err, ShouldBeNil)
+
+		Convey("Should render header template", func() {
+			So(header.Get("x-header"), ShouldEqual, "my secret 123")
+		})
+	})
+
+}