1 files changed, 79 insertions, 0 deletions
diff --git a/packages/web-util/src/utils/axios.ts b/packages/web-util/src/utils/axios.ts
new file mode 100644
index 000000000..c38314009
--- /dev/null
+++ b/packages/web-util/src/utils/axios.ts
@@ -0,0 +1,79 @@
+/*
+ This file is part of GNU Taler
+ (C) 2021 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+import axios, { AxiosPromise, AxiosRequestConfig } from "axios";
+
+/**
+ *
+ * @author Sebastian Javier Marchano (sebasjm)
+ */
+
+//FIXME: remove this, since it is not used anymore
+/**
+ * @deprecated
+ */
+export let removeAxiosCancelToken = false;
+
+export let axiosHandler = function doAxiosRequest(
+  config: AxiosRequestConfig,
+): AxiosPromise<any> {
+  return axios(config);
+};
+
+const listOfHandlersToUseOnce = new Array<AxiosHandler>();
+
+/**
+ * Set this backend library to testing mode.
+ * Instead of calling the axios library the @handler will be called
+ *
+ * @param handler callback that will mock axios
+ */
+export function setAxiosRequestAsTestingEnvironment(
+  handler: AxiosHandler,
+): void {
+  removeAxiosCancelToken = true;
+  axiosHandler = function defaultTestingHandler(config) {
+    const currentHanlder = listOfHandlersToUseOnce.shift();
+    if (!currentHanlder) {
+      return handler(config);
+    }
+
+    return currentHanlder(config);
+  };
+}
+
+type AxiosHandler = (config: AxiosRequestConfig) => AxiosPromise<any>;
+type AxiosArguments = { args: AxiosRequestConfig | undefined };
+
+/**
+ * Replace Axios handler with a mock.
+ * Throw if is called more than once
+ *
+ * @param handler mock function
+ * @returns savedArgs
+ */
+export function mockAxiosOnce(handler: AxiosHandler): {
+  args: AxiosRequestConfig | undefined;
+} {
+  const savedArgs: AxiosArguments = { args: undefined };
+  listOfHandlersToUseOnce.push(
+    (config: AxiosRequestConfig): AxiosPromise<any> => {
+      savedArgs.args = config;
+      return handler(config);
+    },
+  );
+  return savedArgs;
+}