add notification apis (#2066)

add alerting apis

add generic proxy

pkg/kapis/generic/generic_test.go

@@ -0,0 +1,60 @@
+package generic
+
+import (
+	"github.com/emicklei/go-restful"
+	"github.com/google/go-cmp/cmp"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+)
+
+var group = "test.kubesphere.io"
+var version = "v1"
+var scheme = "http"
+
+func TestNewGenericProxy(t *testing.T) {
+	var testCases = []struct {
+		description string
+		endpoint    string
+		query       string
+		expected    *url.URL
+	}{
+		{
+			description: "Endpoint with path",
+			endpoint:    "http://awesome.kubesphere-system.svc:8080/api",
+			query:       "/kapis/test.kubesphere.io/v1/foo/bar?id=1&time=whatever",
+			expected: &url.URL{
+				Scheme:   scheme,
+				Host:     "awesome.kubesphere-system.svc:8080",
+				Path:     "/api/v1/foo/bar",
+				RawQuery: "id=1&time=whatever",
+			},
+		},
+		{
+			description: "Endpoint without path",
+			endpoint:    "http://awesome.kubesphere-system.svc:8080",
+			query:       "/kapis/test.kubesphere.io/v1/foo/bar?id=1&time=whatever",
+			expected: &url.URL{
+				Scheme:   scheme,
+				Host:     "awesome.kubesphere-system.svc:8080",
+				Path:     "/v1/foo/bar",
+				RawQuery: "id=1&time=whatever",
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+		proxy, err := NewGenericProxy(testCase.endpoint, group, version)
+		if err != nil {
+			t.Error(err)
+		}
+
+		t.Run(testCase.description, func(t *testing.T) {
+			request := httptest.NewRequest("GET", testCase.query, nil)
+			u := proxy.makeURL(restful.NewRequest(request))
+			if diff := cmp.Diff(u, testCase.expected); len(diff) != 0 {
+				t.Errorf("%T differ (-got, +want): %s", testCase.expected, diff)
+			}
+		})
+	}
+}