feat: enable weekday-based medication scheduling

Closes #463

frontend/src/test/utils/intake-units.test.ts

@@ -0,0 +1,23 @@
+import { describe, expect, it, vi } from "vitest";
+
+import { convertLiquidUsageToMl, getLiquidCountUnitLabel } from "../../utils/intake-units";
+
+describe("intake-units", () => {
+	it("keeps ml unchanged and converts teaspoon and tablespoon usage to ml", () => {
+		expect(convertLiquidUsageToMl(12, "ml")).toBe(12);
+		expect(convertLiquidUsageToMl(2, "tsp")).toBe(10);
+		expect(convertLiquidUsageToMl(3, "tbsp")).toBe(45);
+	});
+
+	it("returns the existing liquid usage labels for each intake unit", () => {
+		const t = vi.fn((key: string) => key);
+
+		expect(getLiquidCountUnitLabel("ml", 2, t)).toBe("form.packageAmountUnitMl");
+		expect(getLiquidCountUnitLabel("tsp", 2, t)).toBe("form.blisters.teaspoons");
+		expect(getLiquidCountUnitLabel("tbsp", 3, t)).toBe("form.blisters.tablespoons");
+
+		expect(t).toHaveBeenNthCalledWith(1, "form.packageAmountUnitMl");
+		expect(t).toHaveBeenNthCalledWith(2, "form.blisters.teaspoons", { count: 2 });
+		expect(t).toHaveBeenNthCalledWith(3, "form.blisters.tablespoons", { count: 3 });
+	});
+});