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Add BufReader.readSlice()

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Original: e37b949e2c
This commit is contained in:
Ryan Dahl 2018-11-07 23:19:08 -05:00
parent 8396619721
commit 423424f1da
4 changed files with 159 additions and 24 deletions
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26
bufio_test.ts
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@ -5,9 +5,10 @@
import * as deno from "deno";
import { test, assertEqual } from "http://deno.land/x/testing/testing.ts";
import { BufReader } from "./bufio.ts";
import { BufReader, BufState } from "./bufio.ts";
import { Buffer } from "./buffer.ts";
import * as iotest from "./iotest.ts";
import { charCode } from "./util.ts";
async function readBytes(buf: BufReader): Promise<string> {
const b = new Uint8Array(1000);
@ -42,7 +43,7 @@ type ReadMaker = { name: string; fn: (r: deno.Reader) => deno.Reader };
const readMakers: ReadMaker[] = [
{ name: "full", fn: r => r },
{ name: "byte", fn: r => new iotest.OneByteReader(r) },
{ name: "half", fn: r => new iotest.HalfReader(r) },
{ name: "half", fn: r => new iotest.HalfReader(r) }
// TODO { name: "data+err", r => new iotest.DataErrReader(r) },
// { name: "timeout", fn: r => new iotest.TimeoutReader(r) },
];
@ -50,7 +51,7 @@ const readMakers: ReadMaker[] = [
function readLines(b: BufReader): string {
let s = "";
while (true) {
let s1 = b.readString('\n');
let s1 = b.readString("\n");
if (s1 == null) {
break; // EOF
}
@ -83,7 +84,7 @@ const bufreaders: NamedBufReader[] = [
{ name: "4", fn: (b: BufReader) => reads(b, 4) },
{ name: "5", fn: (b: BufReader) => reads(b, 5) },
{ name: "7", fn: (b: BufReader) => reads(b, 7) },
{ name: "bytes", fn: readBytes },
{ name: "bytes", fn: readBytes }
// { name: "lines", fn: readLines },
];
@ -128,3 +129,20 @@ test(async function bufioBufReader() {
}
}
});
test(async function bufioBufferFull() {
const longString =
"And now, hello, world! It is the time for all good men to come to the aid of their party";
const buf = new BufReader(stringsReader(longString), MIN_READ_BUFFER_SIZE);
let [line, state] = await buf.readSlice(charCode("!"));
const decoder = new TextDecoder();
let actual = decoder.decode(line);
assertEqual(state, BufState.BufferFull);
assertEqual(actual, "And now, hello, ");
[line, state] = await buf.readSlice(charCode("!"));
actual = decoder.decode(line);
assertEqual(actual, "world!");
assertEqual(state, BufState.Ok);
});