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import { readableStreamToText, spawn } from "bun";
import { describe, expect, it } from "bun:test";
describe("spawn", () => {
const hugeString = "hello".repeat(10000).slice();
it("stdout can be read", async () => {
await Bun.write("/tmp/out.txt", hugeString);
const { stdout } = spawn({
cmd: ["cat", "/tmp/out.txt"],
stdout: "pipe",
});
const text = await readableStreamToText(stdout);
expect(text).toBe(hugeString);
});
it("stdin can be read and stdout can be written", async () => {
const { stdout, stdin, exited } = spawn({
cmd: ["bash", import.meta.dir + "/bash-echo.sh"],
stdout: "pipe",
stdin: "pipe",
stderr: "inherit",
});
await stdin.write(hugeString);
await stdin.end();
const text = await readableStreamToText(stdout);
expect(text.trim()).toBe(hugeString);
await exited;
});
describe("pipe", () => {
function huge() {
return spawn({
cmd: ["echo", hugeString],
stdout: "pipe",
stdin: "pipe",
stderr: "inherit",
});
}
function helloWorld() {
return spawn({
cmd: ["echo", "hello"],
stdout: "pipe",
stdin: "pipe",
});
}
const fixtures = [
[helloWorld, "hello"],
[huge, hugeString],
];
for (const [callback, fixture] of fixtures) {
describe(fixture.slice(0, 12), () => {
describe("should should allow reading stdout", () => {
it("before exit", async () => {
const process = callback();
const output = await readableStreamToText(process.stdout);
const expected = fixture + "\n";
expect(output.length).toBe(expected.length);
expect(output).toBe(expected);
await process.exited;
});
it("before exit (chunked)", async () => {
const process = callback();
var output = "";
var reader = process.stdout.getReader();
var done = false;
while (!done) {
var { value, done } = await reader.read();
if (value) output += new TextDecoder().decode(value);
}
const expected = fixture + "\n";
expect(output.length).toBe(expected.length);
expect(output).toBe(expected);
await process.exited;
});
it("after exit", async () => {
const process = callback();
await process.stdin.end();
const output = await readableStreamToText(process.stdout);
const expected = fixture + "\n";
expect(output.length).toBe(expected.length);
expect(output).toBe(expected);
await process.exited;
});
});
});
}
});
});
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