Add unit tests for toErrorMessage utility

src/__tests__/unit/utils/to-error-message.test.ts

@@ -0,0 +1,37 @@
+import { AxiosError } from "axios"
+import { describe, expect, it } from "vitest"
+
+import { toErrorMessage } from "@/utils/to-error-message"
+
+describe("toErrorMessage", () => {
+    it("should return the error message from the response", () => {
+        const mockError = {
+            response: {
+                data: {
+                    message: "Custom error message",
+                },
+            },
+        } as AxiosError
+
+        const result = toErrorMessage(mockError)
+        expect(result).toBe("Custom error message")
+    })
+
+    it("should return default message if error message is not provided", () => {
+        const mockError = {} as AxiosError
+
+        const result = toErrorMessage(mockError)
+        expect(result).toBe("Something went wrong, please try again")
+    })
+
+    it("should return default message if response or data is undefined", () => {
+        const mockError = {
+            response: {
+                data: undefined,
+            },
+        } as AxiosError
+
+        const result = toErrorMessage(mockError)
+        expect(result).toBe("Something went wrong, please try again")
+    })
+})

src/utils/to-error-message.tsx

@@ -2,6 +2,6 @@ import { AxiosError } from "axios"
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export const toErrorMessage = (error: AxiosError<any>) => {
-    const message = error.response?.data.message
+    const message = error.response?.data?.message
     return message || "Something went wrong, please try again"
 }