Kundeninventar-Nummern kollisionsfrei vergeben

backend/tests/numberRangeAvailability.test.ts

@@ -0,0 +1,50 @@
+import assert from "node:assert/strict"
+import test from "node:test"
+
+import { useNextNumberRangeNumber } from "../src/utils/functions"
+
+test("number range skips identifiers that are already in use", async () => {
+    const tenant = {
+        id: 7,
+        numberRanges: {
+            customerinventoryitems: {
+                prefix: "KIA-",
+                suffix: "",
+                nextNumber: 1000,
+            },
+        },
+    }
+    let savedNumberRanges: any = null
+
+    const tx = {
+        execute: async () => undefined,
+        select: () => ({
+            from: () => ({
+                where: async () => [tenant],
+            }),
+        }),
+        update: () => ({
+            set: (data: any) => ({
+                where: async () => {
+                    savedNumberRanges = data.numberRanges
+                },
+            }),
+        }),
+    }
+    const server = {
+        db: {
+            transaction: async (callback: (transaction: typeof tx) => Promise<any>) => callback(tx),
+        },
+    } as any
+    const occupied = new Set(["KIA-1000", "KIA-1001"])
+
+    const result = await useNextNumberRangeNumber(
+        server,
+        tenant.id,
+        "customerinventoryitems",
+        async (candidate) => !occupied.has(candidate)
+    )
+
+    assert.equal(result.usedNumber, "KIA-1002")
+    assert.equal(savedNumberRanges.customerinventoryitems.nextNumber, 1003)
+})