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Code Issues Packages 1 Wiki Activity

refactor: decouple Console implementation from stdout (#4899)

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When creating a console instance, one must pass "printFunc" arg
which is used internally by Console to output messages.

Due to numerous refactors there was a single method ("console.clear()")
that used "Deno.stdout" instead of "printFunc".

This commit unifies how "Console" outpus message, by using 
"printFunc" in all methods; consequently "Deno.stdout" is no longer
imported in "cli/js/console.ts" making it a standalone module that doesn't
depend on any CLI-specific APIs.
This commit is contained in:
Bartek Iwańczuk 2020-04-27 15:40:47 +02:00 committed by GitHub
parent 8e4333fd99
commit 8e9ab9e33e
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 6 additions and 32 deletions
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21
cli/js/tests/console_test.ts
View file

@ -5,8 +5,6 @@ import { assert, assertEquals, unitTest } from "./test_util.ts";
// in order to "trick" TypeScript.
const {
inspect,
writeSync,
stdout,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} = Deno as any;
@ -744,21 +742,10 @@ unitTest(function consoleTestError(): void {
});
unitTest(function consoleTestClear(): void {
const stdoutWriteSync = stdout.writeSync;
const uint8 = new TextEncoder().encode("\x1b[1;1H" + "\x1b[0J");
let buffer = new Uint8Array(0);
stdout.writeSync = (u8: Uint8Array): Promise<number> => {
const tmp = new Uint8Array(buffer.length + u8.length);
tmp.set(buffer, 0);
tmp.set(u8, buffer.length);
buffer = tmp;
return writeSync(stdout.rid, u8);
};
console.clear();
stdout.writeSync = stdoutWriteSync;
assertEquals(buffer, uint8);
mockConsole((console, out) => {
console.clear();
assertEquals(out.toString(), "\x1b[1;1H" + "\x1b[0J");
});
});
// Test bound this issue

17
cli/js/web/console.ts
View file

@ -1,8 +1,5 @@
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { isTypedArray, TypedArray } from "./util.ts";
import { TextEncoder } from "./text_encoding.ts";
import { SyncWriter } from "../io.ts";
import { stdout } from "../files.ts";
import { cliTable } from "./console_table.ts";
import { exposeForTest } from "../internals.ts";
import { PromiseState } from "./promise.ts";
@ -39,16 +36,6 @@ export class CSI {
/* eslint-disable @typescript-eslint/no-use-before-define */
function cursorTo(stream: SyncWriter, _x: number, _y?: number): void {
const uint8 = new TextEncoder().encode(CSI.kClear);
stream.writeSync(uint8);
}
function clearScreenDown(stream: SyncWriter): void {
const uint8 = new TextEncoder().encode(CSI.kClearScreenDown);
stream.writeSync(uint8);
}
function getClassInstanceName(instance: unknown): string {
if (typeof instance !== "object") {
return "";
@ -934,8 +921,8 @@ export class Console {
clear = (): void => {
this.indentLevel = 0;
cursorTo(stdout, 0, 0);
clearScreenDown(stdout);
this.#printFunc(CSI.kClear, false);
this.#printFunc(CSI.kClearScreenDown, false);
};
trace = (...args: unknown[]): void => {