add: tests

tests/ConfigProvider.test.js

@@ -0,0 +1,45 @@
+import React from "react";
+import { render, screen, act } from "@testing-library/react";
+import ConfigProvider from "../src/ConfigProvider";
+
+global.fetch = jest.fn(() =>
+    new Promise((resolve) =>
+        setTimeout(() => {
+            resolve({
+                ok: true,
+                json: () =>
+                    Promise.resolve({
+                        BACKEND_HOST: "http://localhost:5000",
+                        FRONTEND_HOST: "http://localhost:3000",
+                    }),
+            });
+        }, 100)
+    )
+);
+
+describe("ConfigProvider", () => {
+    it("should display loading initially", async () => {
+        await act(async () => {
+            render(
+                <ConfigProvider>
+                    <div>Loaded</div>
+                </ConfigProvider>
+            );
+        });
+
+        expect(screen.getByText(/Loading configuration/i)).toBeInTheDocument();
+    });
+
+    it("should display children after loading", async () => {
+        await act(async () => {
+            render(
+                <ConfigProvider>
+                    <div>Loaded</div>
+                </ConfigProvider>
+            );
+        });
+
+        const loadedText = await screen.findByText("Loaded");
+        expect(loadedText).toBeInTheDocument();
+    });
+});