Add tests for simpleKeyStore

client/src/composables/simpleKeyStore.test.ts

@@ -0,0 +1,83 @@
+import flushPromises from "flush-promises";
+
+import { useSimpleKeyStore } from "./simpleKeyStore";
+
+interface ItemData {
+    id: string;
+    name: string;
+}
+
+const fetchItem = jest.fn();
+const shouldFetch = jest.fn();
+
+describe("useSimpleKeyStore", () => {
+    beforeEach(() => {
+        fetchItem.mockClear();
+        shouldFetch.mockClear();
+    });
+
+    it("should fetch the item if it is not already stored", async () => {
+        const id = "1";
+        const item = { id: id, name: "Item 1" };
+        const fetchParams = { id: id };
+        const apiResponse = { data: item };
+
+        fetchItem.mockResolvedValue(apiResponse);
+
+        const { storedItems, getItemById, isLoadingItem } = useSimpleKeyStore<ItemData>(fetchItem);
+
+        expect(storedItems.value).toEqual({});
+        expect(isLoadingItem.value(id)).toBeFalsy();
+
+        getItemById.value(id);
+
+        expect(isLoadingItem.value(id)).toBeTruthy();
+        await flushPromises();
+        expect(isLoadingItem.value(id)).toBeFalsy();
+        expect(storedItems.value[id]).toEqual(item);
+        expect(fetchItem).toHaveBeenCalledWith(fetchParams);
+    });
+
+    it("should not fetch the item if it is already stored", async () => {
+        const id = "1";
+        const item = { id: id, name: "Item 1" };
+
+        fetchItem.mockResolvedValue({ data: item });
+
+        const { storedItems, getItemById, isLoadingItem } = useSimpleKeyStore<ItemData>(fetchItem);
+
+        storedItems.value[id] = item;
+
+        expect(isLoadingItem.value(id)).toBeFalsy();
+
+        getItemById.value(id);
+
+        expect(isLoadingItem.value(id)).toBeFalsy();
+        expect(storedItems.value[id]).toEqual(item);
+        expect(fetchItem).not.toHaveBeenCalled();
+    });
+
+    it("should fetch the item regardless of whether it is already stored if shouldFetch returns true", async () => {
+        const id = "1";
+        const item = { id: id, name: "Item 1" };
+        const fetchParams = { id: id };
+        const apiResponse = { data: item };
+
+        fetchItem.mockResolvedValue(apiResponse);
+        shouldFetch.mockReturnValue(true);
+
+        const { storedItems, getItemById, isLoadingItem } = useSimpleKeyStore<ItemData>(fetchItem, shouldFetch);
+
+        storedItems.value[id] = item;
+
+        expect(isLoadingItem.value(id)).toBeFalsy();
+
+        getItemById.value(id);
+
+        expect(isLoadingItem.value(id)).toBeTruthy();
+        await flushPromises();
+        expect(isLoadingItem.value(id)).toBeFalsy();
+        expect(storedItems.value[id]).toEqual(item);
+        expect(fetchItem).toHaveBeenCalledWith(fetchParams);
+    });
+});