Increase test Coverage of pkg/authorization

Signed-off-by: Raja Sami <raja.sami@tenpearls.com>

pkg/authorization/middleware_unix_test.go

@@ -0,0 +1,65 @@
+// +build !windows
+
+package authorization
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/docker/docker/pkg/plugingetter"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/net/context"
+)
+
+func TestMiddlewareWrapHandler(t *testing.T) {
+	server := authZPluginTestServer{t: t}
+	server.start()
+	defer server.stop()
+
+	authZPlugin := createTestPlugin(t)
+	pluginNames := []string{authZPlugin.name}
+
+	var pluginGetter plugingetter.PluginGetter
+	middleWare := NewMiddleware(pluginNames, pluginGetter)
+	handler := func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
+		return nil
+	}
+
+	authList := []Plugin{authZPlugin}
+	middleWare.SetPlugins([]string{"My Test Plugin"})
+	setAuthzPlugins(middleWare, authList)
+	mdHandler := middleWare.WrapHandler(handler)
+	require.NotNil(t, mdHandler)
+
+	addr := "www.example.com/auth"
+	req, _ := http.NewRequest("GET", addr, nil)
+	req.RequestURI = addr
+	req.Header.Add("header", "value")
+
+	resp := httptest.NewRecorder()
+	ctx := context.Background()
+
+	t.Run("Error Test Case :", func(t *testing.T) {
+		server.replayResponse = Response{
+			Allow: false,
+			Msg:   "Server Auth Not Allowed",
+		}
+		if err := mdHandler(ctx, resp, req, map[string]string{}); err == nil {
+			require.Error(t, err)
+		}
+
+	})
+
+	t.Run("Positive Test Case :", func(t *testing.T) {
+		server.replayResponse = Response{
+			Allow: true,
+			Msg:   "Server Auth Allowed",
+		}
+		if err := mdHandler(ctx, resp, req, map[string]string{}); err != nil {
+			require.NoError(t, err)
+		}
+
+	})
+
+}