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import { spawn } from "bun";
import { expect, it } from "bun:test";
import { bunEnv } from "bunEnv";
import { bunExe } from "bunExe";
import { readFileSync, renameSync, rmSync, unlinkSync, writeFileSync } from "fs";
it("should hot reload when file is overwritten", async () => {
const root = import.meta.dir + "/hot-runner.js";
const runner = spawn({
cmd: [bunExe(), "--hot", "run", root],
env: bunEnv,
stdout: "pipe",
stderr: "inherit",
stdin: "ignore",
});
var reloadCounter = 0;
async function onReload() {
writeFileSync(root, readFileSync(root, "utf-8"));
}
for await (const line of runner.stdout!) {
var str = new TextDecoder().decode(line);
var any = false;
for (let line of str.split("\n")) {
if (!line.includes("[#!root]")) continue;
reloadCounter++;
if (reloadCounter === 3) {
runner.unref();
runner.kill();
break;
}
expect(line).toContain(`[#!root] Reloaded: ${reloadCounter}`);
any = true;
}
if (any) await onReload();
}
expect(reloadCounter).toBe(3);
});
it("should recover from errors", async () => {
const root = import.meta.dir + "/hot-runner.js";
const runner = spawn({
cmd: [bunExe(), "--hot", "run", root],
env: bunEnv,
stdout: "pipe",
stderr: "pipe",
stdin: "ignore",
});
let reloadCounter = 0;
const input = readFileSync(root, "utf-8");
function onReloadGood() {
writeFileSync(root, input);
}
function onReloadError() {
writeFileSync(root, "throw new Error('error');\n");
}
var queue = [onReloadError, onReloadGood, onReloadError, onReloadGood];
var errors: string[] = [];
var onError;
(async () => {
for await (let line of runner.stderr!) {
var str = new TextDecoder().decode(line);
errors.push(str);
onError && onError(str);
}
})();
for await (const line of runner.stdout!) {
var str = new TextDecoder().decode(line);
var any = false;
for (let line of str.split("\n")) {
if (!line.includes("[#!root]")) continue;
reloadCounter++;
if (reloadCounter === 3) {
runner.unref();
runner.kill();
break;
}
expect(line).toContain(`[#!root] Reloaded: ${reloadCounter}`);
any = true;
}
if (any) {
queue.shift()!();
await new Promise<void>((resolve, reject) => {
if (errors.length > 0) {
errors.length = 0;
resolve();
return;
}
onError = resolve;
});
queue.shift()!();
}
}
expect(reloadCounter).toBe(3);
});
it("should not hot reload when a random file is written", async () => {
const root = import.meta.dir + "/hot-runner.js";
const runner = spawn({
cmd: [bunExe(), "--hot", "run", root],
env: bunEnv,
stdout: "pipe",
stderr: "inherit",
stdin: "ignore",
});
let reloadCounter = 0;
const code = readFileSync(root, "utf-8");
async function onReload() {
writeFileSync(root + ".another.yet.js", code);
unlinkSync(root + ".another.yet.js");
}
var waiter = new Promise<void>((resolve, reject) => {
setTimeout(async () => {
resolve();
}, 50);
});
var finished = false;
await Promise.race([
waiter,
(async () => {
if (finished) {
return;
}
for await (const line of runner.stdout!) {
if (finished) {
return;
}
var str = new TextDecoder().decode(line);
for (let line of str.split("\n")) {
if (!line.includes("[#!root]")) continue;
if (finished) {
return;
}
await onReload();
reloadCounter++;
expect(line).toContain(`[#!root] Reloaded: ${reloadCounter}`);
}
}
})(),
]);
finished = true;
runner.kill(0);
runner.unref();
expect(reloadCounter).toBe(1);
});
it("should hot reload when a file is deleted and rewritten", async () => {
const root = import.meta.dir + "/hot-runner.js";
const runner = spawn({
cmd: [bunExe(), "--hot", "run", root],
env: bunEnv,
stdout: "pipe",
stderr: "inherit",
stdin: "ignore",
});
var reloadCounter = 0;
async function onReload() {
const contents = readFileSync(root, "utf-8");
unlinkSync(root);
writeFileSync(root, contents);
}
for await (const line of runner.stdout!) {
var str = new TextDecoder().decode(line);
var any = false;
for (let line of str.split("\n")) {
if (!line.includes("[#!root]")) continue;
reloadCounter++;
if (reloadCounter === 3) {
runner.unref();
runner.kill();
break;
}
expect(line).toContain(`[#!root] Reloaded: ${reloadCounter}`);
any = true;
}
if (any) await onReload();
}
expect(reloadCounter).toBe(3);
});
it("should hot reload when a file is renamed() into place", async () => {
const root = import.meta.dir + "/hot-runner.js";
const runner = spawn({
cmd: [bunExe(), "--hot", "run", root],
env: bunEnv,
stdout: "pipe",
stderr: "inherit",
stdin: "ignore",
});
var reloadCounter = 0;
async function onReload() {
const contents = readFileSync(root, "utf-8");
rmSync(root + ".tmpfile", { force: true });
await 1;
writeFileSync(root + ".tmpfile", contents);
await 1;
renameSync(root + ".tmpfile", root);
await 1;
}
for await (const line of runner.stdout!) {
var str = new TextDecoder().decode(line);
var any = false;
for (let line of str.split("\n")) {
if (!line.includes("[#!root]")) continue;
reloadCounter++;
if (reloadCounter === 3) {
runner.unref();
runner.kill();
break;
}
expect(line).toContain(`[#!root] Reloaded: ${reloadCounter}`);
any = true;
}
if (any) await onReload();
}
expect(reloadCounter).toBe(3);
});
|
