concurrency

2026-02-07 12:45:25 -08:00
parent dd0f381ed1
commit de254d46f2
12 changed files with 429 additions and 31 deletions
@@ -0,0 +1,32 @@
+import { describe, expect, it } from "vitest";
+import {
+  hasRenderableElements,
+  isSuspiciousEmptySnapshot,
+} from "./shared";
+
+describe("editor/shared scene guards", () => {
+  it("detects renderable elements", () => {
+    expect(hasRenderableElements([{ id: "a", isDeleted: false }])).toBe(true);
+    expect(
+      hasRenderableElements([
+        { id: "a", isDeleted: true },
+        { id: "b", isDeleted: true },
+      ])
+    ).toBe(false);
+  });
+
+  it("flags empty snapshot after a previously non-empty persisted scene", () => {
+    const previous = [{ id: "a", isDeleted: false }];
+    expect(isSuspiciousEmptySnapshot(previous, [])).toBe(true);
+  });
+
+  it("does not flag empty snapshot for already-empty drawings", () => {
+    expect(isSuspiciousEmptySnapshot([], [])).toBe(false);
+  });
+
+  it("does not flag non-empty snapshots", () => {
+    const previous = [{ id: "a", isDeleted: false }];
+    const next = [{ id: "a", isDeleted: true }];
+    expect(isSuspiciousEmptySnapshot(previous, next)).toBe(false);
+  });
+});