Date Test

1import { describe, expect, it } from "vitest";
2import { query } from "./clickhouse.js";
3import { NeedMoreData, Cursor } from "../src/readers/core.js";
4import { readDate } from "../src/readers/datetime.js";
5
6async function reader(expr: string): Promise<Cursor> {
7  return new Cursor(await query(`SELECT ${expr} FORMAT RowBinary`));
8}
9
10describe("readDate", () => {
11  it("decodes to a JS Date at UTC midnight", async () => {
12    const r = await reader("toDate('2021-03-15')");
13    const d = readDate(r);
14    expect(d.toISOString()).toBe("2021-03-15T00:00:00.000Z");
15    expect(r.pos).toBe(2);
16  });
17
18  it("decodes the epoch", async () => {
19    const d = readDate(await reader("toDate('1970-01-01')"));
20    expect(d.toISOString()).toBe("1970-01-01T00:00:00.000Z");
21  });
22
23  describe("advance() edge cases", () => {
24    it("throws NeedMoreData for every incomplete prefix (0 .. full.length-1)", async () => {
25      const full = await query("SELECT toDate('2021-03-15') FORMAT RowBinary");
26      for (let len = 0; len < full.length; len++) {
27        const r = new Cursor(full.subarray(0, len));
28        let thrown: unknown;
29        try {
30          readDate(r);
31        } catch (e) {
32          thrown = e;
33        }
34        expect(thrown, `prefix length ${len} of ${full.length}`).toBe(
35          NeedMoreData,
36        );
37      }
38    });
39  });
40});