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import { describe, it, expect, beforeAll } from "bun:test";
import { spawn, execSync } from "node:child_process";
import { bunExe } from "bunExe";
const CHILD_PROCESS_FILE = import.meta.dir + "/spawned-child.js";
const OUT_FILE = import.meta.dir + "/stdio-test-out.txt";
describe("process.stdout", () => {
it("should allow us to write to it", done => {
const child = spawn(bunExe(), [CHILD_PROCESS_FILE, "STDOUT"]);
child.stdout.setEncoding("utf8");
child.stdout.on("data", data => {
try {
expect(data).toBe("stdout_test");
done();
} catch (err) {
done(err);
}
});
});
});
describe("process.stdin", () => {
it("should allow us to read from stdin in readable mode", done => {
const input = "hello\n";
// Child should read from stdin and write it back
const child = spawn(bunExe(), [CHILD_PROCESS_FILE, "STDIN", "READABLE"]);
let data = "";
child.stdout.setEncoding("utf8");
child.stdout
.on("data", chunk => {
data += chunk;
})
.on("end", function () {
try {
expect(data).toBe(`data: ${input}`);
done();
} catch (err) {
done(err);
}
});
child.stdin.write(input);
child.stdin.end();
});
it("should allow us to read from stdin via flowing mode", done => {
const input = "hello\n";
// Child should read from stdin and write it back
const child = spawn(bunExe(), [CHILD_PROCESS_FILE, "STDIN", "FLOWING"]);
let data = "";
child.stdout.setEncoding("utf8");
child.stdout
.on("readable", () => {
let chunk;
while ((chunk = child.stdout.read()) !== null) {
data += chunk;
}
})
.on("end", function () {
try {
expect(data).toBe(`data: ${input}`);
done();
} catch (err) {
done(err);
}
});
child.stdin.write(input);
child.stdin.end();
});
it("should allow us to read > 65kb from stdin", done => {
const numReps = Math.ceil((66 * 1024) / 5);
const input = "hello".repeat(numReps);
// Child should read from stdin and write it back
const child = spawn(bunExe(), [CHILD_PROCESS_FILE, "STDIN", "FLOWING"]);
let data = "";
child.stdout.setEncoding("utf8");
child.stdout
.on("readable", () => {
let chunk;
while ((chunk = child.stdout.read()) !== null) {
data += chunk;
}
})
.on("end", function () {
try {
expect(data).toBe(`data: ${input}`);
done();
} catch (err) {
done(err);
}
});
child.stdin.write(input);
child.stdin.end();
});
it("should allow us to read from a file", () => {
const result = execSync(`${bunExe()} ${CHILD_PROCESS_FILE} STDIN FLOWING < ${import.meta.dir}/readFileSync.txt`, {
encoding: "utf8",
});
expect(result).toEqual("data: File read successfully");
});
});
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