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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
const { Buffer } = Deno;
type Reader = Deno.Reader;
import { test } from "../testing/mod.ts";
import { assertEquals } from "../testing/asserts.ts";
import {
copyN,
readInt,
readLong,
readShort,
sliceLongToBytes
} from "./ioutil.ts";
import { BufReader } from "./bufio.ts";
import { stringsReader } from "./util.ts";
class BinaryReader implements Reader {
index = 0;
constructor(private bytes: Uint8Array = new Uint8Array(0)) {}
async read(p: Uint8Array): Promise<number | Deno.EOF> {
p.set(this.bytes.subarray(this.index, p.byteLength));
this.index += p.byteLength;
return p.byteLength;
}
}
test(async function testReadShort(): Promise<void> {
const r = new BinaryReader(new Uint8Array([0x12, 0x34]));
const short = await readShort(new BufReader(r));
assertEquals(short, 0x1234);
});
test(async function testReadInt(): Promise<void> {
const r = new BinaryReader(new Uint8Array([0x12, 0x34, 0x56, 0x78]));
const int = await readInt(new BufReader(r));
assertEquals(int, 0x12345678);
});
test(async function testReadLong(): Promise<void> {
const r = new BinaryReader(
new Uint8Array([0x00, 0x00, 0x00, 0x78, 0x12, 0x34, 0x56, 0x78])
);
const long = await readLong(new BufReader(r));
assertEquals(long, 0x7812345678);
});
test(async function testReadLong2(): Promise<void> {
const r = new BinaryReader(
new Uint8Array([0, 0, 0, 0, 0x12, 0x34, 0x56, 0x78])
);
const long = await readLong(new BufReader(r));
assertEquals(long, 0x12345678);
});
test(async function testSliceLongToBytes(): Promise<void> {
const arr = sliceLongToBytes(0x1234567890abcdef);
const actual = readLong(new BufReader(new BinaryReader(new Uint8Array(arr))));
const expected = readLong(
new BufReader(
new BinaryReader(
new Uint8Array([0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef])
)
)
);
assertEquals(actual, expected);
});
test(async function testSliceLongToBytes2(): Promise<void> {
const arr = sliceLongToBytes(0x12345678);
assertEquals(arr, [0, 0, 0, 0, 0x12, 0x34, 0x56, 0x78]);
});
test(async function testCopyN1(): Promise<void> {
const w = new Buffer();
const r = stringsReader("abcdefghij");
const n = await copyN(w, r, 3);
assertEquals(n, 3);
assertEquals(w.toString(), "abc");
});
test(async function testCopyN2(): Promise<void> {
const w = new Buffer();
const r = stringsReader("abcdefghij");
const n = await copyN(w, r, 11);
assertEquals(n, 10);
assertEquals(w.toString(), "abcdefghij");
});
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