vault-link/frontend/deterministic-tests/src/tests/concurrent-rename-first-wins.test.ts

import type { AssertableState } from "../utils/assertable-state";
import type { TestDefinition } from "../test-definition";

export const concurrentRenameFirstWinsTest: TestDefinition = {
    description:
        "Both clients start online with the same file. Both go offline, " +
        "rename the file to different paths, and edit it. When they reconnect, " +
        "the first rename to reach the server wins the path and both content " +
        "edits are merged.",
    clients: 2,
    steps: [
        {
            type: "create",
            client: 0,
            path: "A.md",
            content: "line 1\nline 2\nline 3"
        },
        { type: "enable-sync", client: 0 },
        { type: "enable-sync", client: 1 },
        { type: "barrier" },
        {
            type: "assert-consistent",
            verify: (s: AssertableState): void => {
                s.assertContent("A.md", "line 1\nline 2\nline 3");
            }
        },

        { type: "disable-sync", client: 0 },
        { type: "disable-sync", client: 1 },

        { type: "rename", client: 0, oldPath: "A.md", newPath: "B.md" },
        {
            type: "update",
            client: 0,
            path: "B.md",
            content: "edit from 0\nline 2\nline 3"
        },

        { type: "rename", client: 1, oldPath: "A.md", newPath: "C.md" },
        {
            type: "update",
            client: 1,
            path: "C.md",
            content: "line 1\nline 2\nedit from 1"
        },

        { type: "enable-sync", client: 0 },
        { type: "enable-sync", client: 1 },
        { type: "barrier" },

        {
            type: "assert-consistent",
            verify: (s: AssertableState): void => {
                s.assertFileNotExists("A.md")
                    .assertFileCount(2)
                    .assertContent("B.md", "edit from 0\nline 2\nline 3")
                    .assertContent("C.md", "line 1\nline 2\nedit from 1");
            }
        }
    ]
};