diff --git a/src/hooks/useReports.ts b/src/hooks/useReports.ts
index a5ec0b5..5abaa64 100644
--- a/src/hooks/useReports.ts
+++ b/src/hooks/useReports.ts
@@ -61,7 +61,7 @@ const initialState: ReportsState = {
customDateFrom: monthStartStr,
customDateTo: todayStr,
sourceId: null,
- categoryType: null,
+ categoryType: "expense",
monthlyTrends: [],
categorySpending: [],
categoryOverTime: { categories: [], data: [], colors: {}, categoryIds: {} },
diff --git a/src/pages/ReportsPage.tsx b/src/pages/ReportsPage.tsx
index 1e34ebc..da4dc90 100644
--- a/src/pages/ReportsPage.tsx
+++ b/src/pages/ReportsPage.tsx
@@ -69,7 +69,7 @@ export default function ReportsPage() {
const monthOptions = useMemo(() => buildMonthOptions(i18n.language), [i18n.language]);
const hasCategories = ["byCategory", "overTime"].includes(state.tab) && filterCategories.length > 0;
- const showFilterPanel = hasCategories || state.tab === "overTime" || (state.tab === "trends" && sources.length > 1);
+ const showFilterPanel = hasCategories || (state.tab === "trends" && sources.length > 1);
return (
diff --git a/src/services/reportService.test.ts b/src/services/reportService.test.ts
new file mode 100644
index 0000000..5b5fa23
--- /dev/null
+++ b/src/services/reportService.test.ts
@@ -0,0 +1,146 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { getCategoryOverTime } from "./reportService";
+
+// Mock the db module
+vi.mock("./db", () => ({
+ getDb: vi.fn(),
+}));
+
+import { getDb } from "./db";
+
+const mockSelect = vi.fn();
+const mockDb = { select: mockSelect };
+
+beforeEach(() => {
+ vi.mocked(getDb).mockResolvedValue(mockDb as never);
+ mockSelect.mockReset();
+});
+
+describe("getCategoryOverTime", () => {
+ it("builds query without WHERE clause when no filters are provided", async () => {
+ // First call: top categories, second call: monthly breakdown
+ mockSelect
+ .mockResolvedValueOnce([]) // topCategories
+ .mockResolvedValueOnce([]); // monthlyRows
+
+ await getCategoryOverTime();
+
+ const topCatSQL = mockSelect.mock.calls[0][0] as string;
+ // No WHERE clause should appear (no filters at all)
+ expect(topCatSQL).not.toContain("WHERE");
+ });
+
+ it("applies typeFilter via category type when provided", async () => {
+ mockSelect
+ .mockResolvedValueOnce([]) // topCategories
+ .mockResolvedValueOnce([]); // monthlyRows
+
+ await getCategoryOverTime(undefined, undefined, 50, undefined, "expense");
+
+ const topCatSQL = mockSelect.mock.calls[0][0] as string;
+ const topCatParams = mockSelect.mock.calls[0][1] as unknown[];
+ expect(topCatSQL).toContain("COALESCE(c.type, 'expense')");
+ expect(topCatSQL).toContain("WHERE");
+ expect(topCatParams[0]).toBe("expense");
+ });
+
+ it("applies income typeFilter correctly", async () => {
+ mockSelect
+ .mockResolvedValueOnce([]) // topCategories
+ .mockResolvedValueOnce([]); // monthlyRows
+
+ await getCategoryOverTime("2025-01-01", "2025-06-30", 50, undefined, "income");
+
+ const topCatSQL = mockSelect.mock.calls[0][0] as string;
+ const topCatParams = mockSelect.mock.calls[0][1] as unknown[];
+ expect(topCatSQL).toContain("COALESCE(c.type, 'expense') = $1");
+ expect(topCatParams[0]).toBe("income");
+ // Date params follow
+ expect(topCatParams[1]).toBe("2025-01-01");
+ expect(topCatParams[2]).toBe("2025-06-30");
+ });
+
+ it("applies date range filters", async () => {
+ mockSelect
+ .mockResolvedValueOnce([]) // topCategories
+ .mockResolvedValueOnce([]); // monthlyRows
+
+ await getCategoryOverTime("2025-01-01", "2025-12-31");
+
+ const topCatSQL = mockSelect.mock.calls[0][0] as string;
+ const topCatParams = mockSelect.mock.calls[0][1] as unknown[];
+ expect(topCatSQL).toContain("t.date >= $1");
+ expect(topCatSQL).toContain("t.date <= $2");
+ expect(topCatParams).toEqual(["2025-01-01", "2025-12-31", 50]);
+ });
+
+ it("applies sourceId filter", async () => {
+ mockSelect
+ .mockResolvedValueOnce([]) // topCategories
+ .mockResolvedValueOnce([]); // monthlyRows
+
+ await getCategoryOverTime(undefined, undefined, 50, 3);
+
+ const topCatSQL = mockSelect.mock.calls[0][0] as string;
+ const topCatParams = mockSelect.mock.calls[0][1] as unknown[];
+ expect(topCatSQL).toContain("t.source_id");
+ expect(topCatParams[0]).toBe(3);
+ });
+
+ it("combines typeFilter, date range, and sourceId", async () => {
+ mockSelect
+ .mockResolvedValueOnce([]) // topCategories
+ .mockResolvedValueOnce([]); // monthlyRows
+
+ await getCategoryOverTime("2025-01-01", "2025-06-30", 10, 2, "expense");
+
+ const topCatSQL = mockSelect.mock.calls[0][0] as string;
+ const topCatParams = mockSelect.mock.calls[0][1] as unknown[];
+ expect(topCatSQL).toContain("COALESCE(c.type, 'expense') = $1");
+ expect(topCatSQL).toContain("t.date >= $2");
+ expect(topCatSQL).toContain("t.date <= $3");
+ expect(topCatSQL).toContain("t.source_id = $4");
+ expect(topCatParams).toEqual(["expense", "2025-01-01", "2025-06-30", 2, 10]);
+ });
+
+ it("returns correct structure with categories, data, colors, and categoryIds", async () => {
+ mockSelect
+ .mockResolvedValueOnce([
+ { category_id: 1, category_name: "Food", category_color: "#ff0000", total: 500 },
+ { category_id: 2, category_name: "Transport", category_color: "#00ff00", total: 200 },
+ ])
+ .mockResolvedValueOnce([
+ { month: "2025-01", category_id: 1, category_name: "Food", total: 300 },
+ { month: "2025-01", category_id: 2, category_name: "Transport", total: 100 },
+ { month: "2025-02", category_id: 1, category_name: "Food", total: 200 },
+ { month: "2025-02", category_id: 2, category_name: "Transport", total: 100 },
+ ]);
+
+ const result = await getCategoryOverTime("2025-01-01", "2025-02-28", 50, undefined, "expense");
+
+ expect(result.categories).toEqual(["Food", "Transport"]);
+ expect(result.colors).toEqual({ Food: "#ff0000", Transport: "#00ff00" });
+ expect(result.categoryIds).toEqual({ Food: 1, Transport: 2 });
+ expect(result.data).toHaveLength(2);
+ expect(result.data[0]).toEqual({ month: "2025-01", Food: 300, Transport: 100 });
+ expect(result.data[1]).toEqual({ month: "2025-02", Food: 200, Transport: 100 });
+ });
+
+ it("groups non-top-N categories into Other", async () => {
+ mockSelect
+ .mockResolvedValueOnce([
+ { category_id: 1, category_name: "Food", category_color: "#ff0000", total: 500 },
+ ])
+ .mockResolvedValueOnce([
+ { month: "2025-01", category_id: 1, category_name: "Food", total: 300 },
+ { month: "2025-01", category_id: 2, category_name: "Transport", total: 100 },
+ { month: "2025-01", category_id: 3, category_name: "Entertainment", total: 50 },
+ ]);
+
+ const result = await getCategoryOverTime("2025-01-01", "2025-01-31", 1, undefined, "expense");
+
+ expect(result.categories).toEqual(["Food", "Other"]);
+ expect(result.colors["Other"]).toBe("#9ca3af");
+ expect(result.data[0]).toEqual({ month: "2025-01", Food: 300, Other: 150 });
+ });
+});