formats.exposed/test/png/crc32.test.ts

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import { assertEquals } from "assert";
import { b } from "../helpers.ts";
import crc32 from "../../public/png/crc32.js";
Deno.test("computes CRC32s", () => {
// These tests are lifted from the following Go 1.19.3 code:
//
// ```
// crc := crc32.NewIEEE()
// fmt.Println(crc.Sum32())
// crc.Write([]byte{})
// fmt.Println(crc.Sum32())
// crc.Write([]byte{1, 2, 3})
// fmt.Println(crc.Sum32())
// crc.Write([]byte{4, 5, 6})
// fmt.Println(crc.Sum32())
// ```
assertEquals(crc32(), 0);
assertEquals(crc32(b(1, 2, 3)), 1438416925);
assertEquals(crc32(b(1, 2, 3, 4, 5, 6)), 2180413220);
});