Set up unit testing infrastructure

Extract slot generation from book.ts into pure utility for unit testing. Add 8 API unit tests and 4 web component tests with coverage thresholds. Closes #39 Co-Authored-By: Paperclip <noreply@paperclip.ing>
2026-03-18 01:55:02 +00:00
parent d718821515
commit cba502e35f
10 changed files with 1046 additions and 26 deletions
@@ -0,0 +1,55 @@
+/**
+ * Business hours slot generation — pure utility, no DB dependencies.
+ * Extracted so it can be unit tested independently of the route layer.
+ */
+
+export const BUSINESS_START_HOUR = 9; // UTC
+export const BUSINESS_END_HOUR = 17; // UTC
+
+export interface BookedSlot {
+  staffId: string | null;
+  startTime: Date;
+  endTime: Date;
+}
+
+/**
+ * Generate all available appointment start times for a given date,
+ * returning only slots where at least one groomer is free.
+ */
+export function generateAvailableSlots({
+  dateStr,
+  durationMinutes,
+  groomerIds,
+  booked,
+}: {
+  dateStr: string;
+  durationMinutes: number;
+  groomerIds: string[];
+  booked: BookedSlot[];
+}): string[] {
+  const dayStart = new Date(`${dateStr}T00:00:00Z`);
+  dayStart.setUTCHours(BUSINESS_START_HOUR, 0, 0, 0);
+  const dayEnd = new Date(`${dateStr}T00:00:00Z`);
+  dayEnd.setUTCHours(BUSINESS_END_HOUR, 0, 0, 0);
+
+  const durationMs = durationMinutes * 60_000;
+  const slots: string[] = [];
+  let slotStart = dayStart.getTime();
+
+  while (slotStart + durationMs <= dayEnd.getTime()) {
+    const slotEnd = slotStart + durationMs;
+    const hasGroomer = groomerIds.some(
+      (groomerId) =>
+        !booked.some(
+          (a) =>
+            a.staffId === groomerId &&
+            a.startTime.getTime() < slotEnd &&
+            a.endTime.getTime() > slotStart
+        )
+    );
+    if (hasGroomer) slots.push(new Date(slotStart).toISOString());
+    slotStart += durationMs;
+  }
+
+  return slots;
+}