acp

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42import { test } from "node:test";
import assert from "node:assert/strict";
import { contain, parentOf, sliceLines } from "./files.ts";

// The `fs/*` bridge must refuse a path outside the session's workspace
// however it is spelled; the broker refuses the rest (symlinks out of the
// open workspaces).
test("the file bridge stays inside the workspace", () => {
  const workspace = "/tmp/root/project";
  // Inside: absolute, relative, and a file that does not exist yet.
  assert.equal(contain(workspace, "/tmp/root/project/src/main.rs"), "/tmp/root/project/src/main.rs");
  assert.equal(contain(workspace, "src/main.rs"), "/tmp/root/project/src/main.rs");
  assert.equal(contain(workspace, "./src/new/deep.rs"), "/tmp/root/project/src/new/deep.rs");
  assert.equal(contain(`${workspace}/`, "src/../src/a.rs"), "/tmp/root/project/src/a.rs");
  // Outside, by absolute path and by climbing out with `..`.
  assert.throws(() => contain(workspace, "/tmp/root/secret.txt"), /outside the workspace/);
  assert.throws(() => contain(workspace, "../secret.txt"), /outside the workspace/);
  assert.throws(() => contain(workspace, "/tmp/root/project/src/../../secret.txt"), /outside the workspace/);
  assert.throws(() => contain(workspace, "/etc/passwd"), /outside the workspace/);
  // A sibling that shares the prefix is not inside.
  assert.throws(() => contain(workspace, "/tmp/root/project-other/a"), /outside the workspace/);
  // No workspace, no files.
  assert.throws(() => contain("", "/a"), /no workspace/);
});

test("Windows paths are compared by segment, the drive in any case", () => {
  assert.equal(contain("C:\\w\\p", "src\\a.rs"), "C:/w/p/src/a.rs");
  assert.equal(contain("C:\\w\\p", "c:\\w\\p\\b.rs"), "c:/w/p/b.rs");
  assert.throws(() => contain("C:\\w\\p", "D:\\x"), /outside/);
});

test("text slices honour line and limit", () => {
  assert.equal(sliceLines("a\nb\nc\n", undefined, undefined), "a\nb\nc\n");
  assert.equal(sliceLines("a\nb\nc\n", 2, undefined), "b\nc");
  assert.equal(sliceLines("a\nb\nc\n", 1, 2), "a\nb");
  assert.equal(sliceLines("a\r\nb\r\n", 1, 1), "a");
});

test("the parent of a path", () => {
  assert.equal(parentOf("/w/a/b.rs"), "/w/a");
  assert.equal(parentOf("/b.rs"), "/");
});