feat: implement reactive BatchFontStore

src/entities/Font/model/store/batchFontStore.test.ts

@@ -0,0 +1,79 @@
+import { queryClient } from '$shared/api/queryClient';
+import { fontKeys } from '$shared/api/queryKeys';
+import {
+    beforeEach,
+    describe,
+    expect,
+    it,
+    vi,
+} from 'vitest';
+import * as api from '../../api/proxy/proxyFonts';
+import { FontNetworkError } from '../../lib/errors/errors';
+import { BatchFontStore } from './batchFontStore.svelte';
+
+describe('BatchFontStore', () => {
+    beforeEach(() => {
+        queryClient.clear();
+        vi.clearAllMocks();
+    });
+
+    describe('Fetch Behavior', () => {
+        it('should skip fetch when initialized with empty IDs', async () => {
+            const spy = vi.spyOn(api, 'fetchFontsByIds');
+            const store = new BatchFontStore([]);
+            expect(spy).not.toHaveBeenCalled();
+            expect(store.fonts).toEqual([]);
+        });
+
+        it('should fetch and seed cache for valid IDs', async () => {
+            const fonts = [{ id: 'a', name: 'A' }] as any[];
+            vi.spyOn(api, 'fetchFontsByIds').mockResolvedValue(fonts);
+            const store = new BatchFontStore(['a']);
+            await vi.waitFor(() => expect(store.fonts).toEqual(fonts), { timeout: 1000 });
+            expect(queryClient.getQueryData(fontKeys.detail('a'))).toEqual(fonts[0]);
+        });
+    });
+
+    describe('Loading States', () => {
+        it('should transition through loading state', async () => {
+            vi.spyOn(api, 'fetchFontsByIds').mockImplementation(() =>
+                new Promise(r => setTimeout(() => r([{ id: 'a' }] as any), 50))
+            );
+            const store = new BatchFontStore(['a']);
+            expect(store.isLoading).toBe(true);
+            await vi.waitFor(() => expect(store.isLoading).toBe(false), { timeout: 1000 });
+        });
+    });
+
+    describe('Error Handling', () => {
+        it('should wrap network failures in FontNetworkError', async () => {
+            vi.spyOn(api, 'fetchFontsByIds').mockRejectedValue(new Error('Network fail'));
+            const store = new BatchFontStore(['a']);
+            await vi.waitFor(() => expect(store.isError).toBe(true), { timeout: 1000 });
+            expect(store.error).toBeInstanceOf(FontNetworkError);
+        });
+
+        it('should handle malformed API responses with FontResponseError', async () => {
+            // Mocking a malformed response that the store should validate
+            vi.spyOn(api, 'fetchFontsByIds').mockResolvedValue(null as any);
+            const store = new BatchFontStore(['a']);
+            await vi.waitFor(() => expect(store.isError).toBe(true), { timeout: 1000 });
+        });
+    });
+
+    describe('Reactivity', () => {
+        it('should refetch when setIds is called', async () => {
+            const fonts1 = [{ id: 'a' }] as any[];
+            const fonts2 = [{ id: 'b' }] as any[];
+            vi.spyOn(api, 'fetchFontsByIds')
+                .mockResolvedValueOnce(fonts1)
+                .mockResolvedValueOnce(fonts2);
+
+            const store = new BatchFontStore(['a']);
+            await vi.waitFor(() => expect(store.fonts).toEqual(fonts1), { timeout: 1000 });
+
+            store.setIds(['b']);
+            await vi.waitFor(() => expect(store.fonts).toEqual(fonts2), { timeout: 1000 });
+        });
+    });
+});