UUIDBig Int Test

1import { describe, expect, it } from "vitest";
2import { query } from "./clickhouse.js";
3import { NeedMoreData, Cursor } from "../src/readers/core.js";
4import { readUUIDBigInt } from "../src/readers/uuid.js";
5
6async function reader(expr: string): Promise<Cursor> {
7  return new Cursor(await query(`SELECT ${expr} FORMAT RowBinary`));
8}
9
10describe("readUUIDBigInt", () => {
11  it("decodes a UUID as its 128-bit value", async () => {
12    const r = await reader("toUUID('61f0c404-5cb3-11e7-907b-a6006ad3dba0')");
13    expect(readUUIDBigInt(r)).toBe(0x61f0c4045cb311e7907ba6006ad3dba0n);
14    expect(r.pos).toBe(16);
15  });
16
17  it("decodes the nil UUID as 0n", async () => {
18    expect(
19      readUUIDBigInt(
20        await reader("toUUID('00000000-0000-0000-0000-000000000000')"),
21      ),
22    ).toBe(0n);
23  });
24
25  it("decodes ...0001 as 1n", async () => {
26    expect(
27      readUUIDBigInt(
28        await reader("toUUID('00000000-0000-0000-0000-000000000001')"),
29      ),
30    ).toBe(1n);
31  });
32
33  it("decodes the all-ones UUID as 2^128 - 1", async () => {
34    expect(
35      readUUIDBigInt(
36        await reader("toUUID('ffffffff-ffff-ffff-ffff-ffffffffffff')"),
37      ),
38    ).toBe((1n << 128n) - 1n);
39  });
40
41  describe("advance() edge cases", () => {
42    it("throws NeedMoreData for every incomplete prefix (0 .. full.length-1)", async () => {
43      const full = await query(
44        "SELECT toUUID('61f0c404-5cb3-11e7-907b-a6006ad3dba0') FORMAT RowBinary",
45      );
46      for (let len = 0; len < full.length; len++) {
47        const r = new Cursor(full.subarray(0, len));
48        let thrown: unknown;
49        try {
50          readUUIDBigInt(r);
51        } catch (e) {
52          thrown = e;
53        }
54        expect(thrown, `prefix length ${len} of ${full.length}`).toBe(
55          NeedMoreData,
56        );
57      }
58    });
59  });
60});