Document the MockStrategy

docs/strategies/mock.md

@@ -1 +1,42 @@
 # MockStrategy
+
+This strategy is intended to be used for testing purposes only.
+
+This strategy receives a Response object and it will resolve all authentication requests using a clone of that Response.
+
+## Create a new instance of MockStrategy
+
+```ts
+import { MockStrategy } from "remix-auth";
+import { Response } from "remix";
+
+let strategy = new MockStrategy(new Response("")));
+```
+
+## Use the strategy
+
+```ts
+authenticator.use(strategy);
+```
+
+## Example in a Test
+
+If you want to test a loader or action that uses an authenticator, you can replace it with the MockStrategy.
+
+```ts
+import { redirect } from "remix";
+import { authenticator } from "./auth.server";
+import { MockStrategy } from "remix-auth";
+import { loader } from "./routes/dashboard";
+
+describe("Dashboard", () => {
+  describe("Loader", () => {
+    test("should redirect to ", async () => {
+      authenticator
+        .unuse("auth0") // remove the strategy you are using
+        .use(new MockStrategy(redirect("/")));
+      // test your loader here which will redirect to /
+    });
+  });
+});
+```