1
import { describe, expect, it } from "vitest";
2
import {
3
  resolveMovedTopLevelDropTarget,
4
  resolveTopLevelDropTarget,
5
  type TopLevelBlockRect,
6
} from "@/client/components/editor/extensions/block-drag-drop";
7
 
8
describe("drag-drop boundary resolution", () => {
9
  const blocks: TopLevelBlockRect[] = [
10
    { pos: 0, end: 3, top: 100, bottom: 140, left: 40, right: 640 },
11
    { pos: 3, end: 6, top: 152, bottom: 192, left: 40, right: 640 },
12
    { pos: 6, end: 9, top: 204, bottom: 244, left: 40, right: 640 },
13
  ];
14
 
15
  it("drops before the first block when hovering above it", () => {
16
    expect(resolveTopLevelDropTarget(blocks, 90)).toBe(0);
17
  });
18
 
19
  it("uses the top half of a block for the boundary before it", () => {
20
    expect(resolveTopLevelDropTarget(blocks, 110)).toBe(0);
21
    expect(resolveTopLevelDropTarget(blocks, 160)).toBe(3);
22
  });
23
 
24
  it("uses the bottom half of a block for the boundary after it", () => {
25
    expect(resolveTopLevelDropTarget(blocks, 135)).toBe(3);
26
    expect(resolveTopLevelDropTarget(blocks, 185)).toBe(6);
27
  });
28
 
29
  it("maps the visual gap before the next block to the boundary before that block", () => {
30
    expect(resolveTopLevelDropTarget(blocks, 146)).toBe(3);
31
    expect(resolveTopLevelDropTarget(blocks, 198)).toBe(6);
32
  });
33
 
34
  it("drops after the last block when hovering below it", () => {
35
    expect(resolveTopLevelDropTarget(blocks, 260)).toBe(9);
36
  });
37
 
38
  it("keeps the first slot sticky for internal block moves until the pointer clears the first block", () => {
39
    expect(resolveMovedTopLevelDropTarget(blocks, 138, 0)).toBe(0);
40
    expect(resolveMovedTopLevelDropTarget(blocks, 141, 0)).toBe(3);
41
  });
42
 
43
  it("does not make later slots sticky", () => {
44
    expect(resolveMovedTopLevelDropTarget(blocks, 186, 3)).toBe(6);
45
  });
46
});