add metrics endpoint to test

http_test.go

@@ -14,17 +14,23 @@ func Test_httpApi(t *testing.T) {
 		wantErr bool
 	}{
 		{
-			name:    "liveliness indicator",
+			name:    "/livez",
 			request: apiEndpoint + "/livez",
 			want:    &http.Response{StatusCode: http.StatusOK},
 			wantErr: false,
 		},
 		{
-			name:    "readyness indicator",
+			name:    "/readyz",
 			request: apiEndpoint + "/readyz",
 			want:    &http.Response{StatusCode: http.StatusOK},
 			wantErr: false,
 		},
+		{
+			name:    "/metrics",
+			request: apiEndpoint + "/metrics",
+			want:    &http.Response{StatusCode: http.StatusOK},
+			wantErr: false,
+		},
 	}
 	coreLock.Lock()
 	startHttpServer()