refactor(web): extract optimistic timeline reconciliation

2026-04-01 09:53:40 +02:00
parent ea4074af8f
commit 54c6cf2e2d
3 changed files with 139 additions and 21 deletions
@@ -0,0 +1,84 @@
+import { describe, expect, it } from "vitest";
+import { reconcileOptimisticEntries } from "./timelineOptimisticAllocations.js";
+
+describe("timelineOptimisticAllocations", () => {
+  it("keeps state unchanged when no optimistic allocations exist", () => {
+    expect(
+      reconcileOptimisticEntries(
+        new Map(),
+        [{ id: "alloc-1", startDate: "2025-01-01T00:00:00.000Z", endDate: "2025-01-02T00:00:00.000Z" }],
+        "alloc-1",
+      ),
+    ).toEqual({
+      optimisticAllocations: new Map(),
+      pendingOptimisticAllocationId: "alloc-1",
+      changed: false,
+    });
+  });
+
+  it("keeps unmatched optimistic entries and pending ids", () => {
+    const optimisticAllocations = new Map([
+      [
+        "alloc-1",
+        {
+          startDate: new Date("2025-01-03T00:00:00.000Z"),
+          endDate: new Date("2025-01-04T00:00:00.000Z"),
+        },
+      ],
+    ]);
+
+    expect(
+      reconcileOptimisticEntries(
+        optimisticAllocations,
+        [{ id: "alloc-1", startDate: "2025-01-05T00:00:00.000Z", endDate: "2025-01-06T00:00:00.000Z" }],
+        "alloc-1",
+      ),
+    ).toEqual({
+      optimisticAllocations,
+      pendingOptimisticAllocationId: "alloc-1",
+      changed: false,
+    });
+  });
+
+  it("drops optimistic entries once server data matches the optimistic override", () => {
+    const optimisticAllocations = new Map([
+      [
+        "alloc-1",
+        {
+          startDate: new Date("2025-01-03T00:00:00.000Z"),
+          endDate: new Date("2025-01-04T00:00:00.000Z"),
+        },
+      ],
+      [
+        "alloc-2",
+        {
+          startDate: new Date("2025-01-07T00:00:00.000Z"),
+          endDate: new Date("2025-01-08T00:00:00.000Z"),
+        },
+      ],
+    ]);
+
+    expect(
+      reconcileOptimisticEntries(
+        optimisticAllocations,
+        [
+          { id: "alloc-1", startDate: "2025-01-03T00:00:00.000Z", endDate: "2025-01-04T00:00:00.000Z" },
+          { id: "alloc-2", startDate: "2025-01-10T00:00:00.000Z", endDate: "2025-01-11T00:00:00.000Z" },
+        ],
+        "alloc-1",
+      ),
+    ).toEqual({
+      optimisticAllocations: new Map([
+        [
+          "alloc-2",
+          {
+            startDate: new Date("2025-01-07T00:00:00.000Z"),
+            endDate: new Date("2025-01-08T00:00:00.000Z"),
+          },
+        ],
+      ]),
+      pendingOptimisticAllocationId: null,
+      changed: true,
+    });
+  });
+});