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denoland-deno/tests/unit/command_test.ts
Bartek Iwańczuk eb218c0f33
chore: upgrade dlint to 0.60.0 (#24041)
Factoring out `dlint` upgrade from
https://github.com/denoland/deno/pull/24034 as it
requires us to change the lint step on mac to use ARM runners.

---------

Co-authored-by: Luca Casonato <hello@lcas.dev>
Co-authored-by: David Sherret <dsherret@users.noreply.github.com>
2024-06-05 01:09:29 +02:00

977 lines
26 KiB
TypeScript

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import {
assert,
assertEquals,
assertRejects,
assertStringIncludes,
assertThrows,
} from "./test_util.ts";
Deno.test(
{ permissions: { write: true, run: true, read: true } },
async function commandWithCwdIsAsync() {
const enc = new TextEncoder();
const cwd = await Deno.makeTempDir({ prefix: "deno_command_test" });
const exitCodeFile = "deno_was_here";
const programFile = "poll_exit.ts";
const program = `
async function tryExit() {
try {
const code = parseInt(await Deno.readTextFile("${exitCodeFile}"));
Deno.exit(code);
} catch {
// Retry if we got here before deno wrote the file.
setTimeout(tryExit, 0.01);
}
}
tryExit();
`;
Deno.writeFileSync(`${cwd}/${programFile}`, enc.encode(program));
const command = new Deno.Command(Deno.execPath(), {
cwd,
args: ["run", "--allow-read", programFile],
stdout: "inherit",
stderr: "inherit",
});
const child = command.spawn();
// Write the expected exit code *after* starting deno.
// This is how we verify that `Child` is actually asynchronous.
const code = 84;
Deno.writeFileSync(`${cwd}/${exitCodeFile}`, enc.encode(`${code}`));
const status = await child.status;
await Deno.remove(cwd, { recursive: true });
assertEquals(status.success, false);
assertEquals(status.code, code);
assertEquals(status.signal, null);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandStdinPiped() {
const command = new Deno.Command(Deno.execPath(), {
args: [
"eval",
`
const buffer = new Uint8Array(5);
await Deno.stdin.read(buffer);
if (new TextDecoder().decode(buffer) !== "hello") {
throw new Error('Expected \\'hello\\'')
}
`,
],
stdin: "piped",
stdout: "null",
stderr: "null",
});
const child = command.spawn();
assertThrows(() => child.stdout, TypeError, "stdout is not piped");
assertThrows(() => child.stderr, TypeError, "stderr is not piped");
const msg = new TextEncoder().encode("hello");
const writer = child.stdin.getWriter();
await writer.write(msg);
writer.releaseLock();
await child.stdin.close();
const status = await child.status;
assertEquals(status.success, true);
assertEquals(status.code, 0);
assertEquals(status.signal, null);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandStdinPiped() {
const command = new Deno.Command(Deno.execPath(), {
args: ["info"],
stdout: "null",
stderr: "null",
});
const child = command.spawn();
assertThrows(() => child.stdin, TypeError, "stdin is not piped");
assertThrows(() => child.stdout, TypeError, "stdout is not piped");
assertThrows(() => child.stderr, TypeError, "stderr is not piped");
await child.status;
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandStdoutPiped() {
const command = new Deno.Command(Deno.execPath(), {
args: [
"eval",
"await Deno.stdout.write(new TextEncoder().encode('hello'))",
],
stderr: "null",
stdout: "piped",
});
const child = command.spawn();
assertThrows(() => child.stdin, TypeError, "stdin is not piped");
assertThrows(() => child.stderr, TypeError, "stderr is not piped");
const readable = child.stdout.pipeThrough(new TextDecoderStream());
const reader = readable.getReader();
const res = await reader.read();
assert(!res.done);
assertEquals(res.value, "hello");
const resEnd = await reader.read();
assert(resEnd.done);
assertEquals(resEnd.value, undefined);
reader.releaseLock();
const status = await child.status;
assertEquals(status.success, true);
assertEquals(status.code, 0);
assertEquals(status.signal, null);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandStderrPiped() {
const command = new Deno.Command(Deno.execPath(), {
args: [
"eval",
"await Deno.stderr.write(new TextEncoder().encode('hello'))",
],
stdout: "null",
stderr: "piped",
});
const child = command.spawn();
assertThrows(() => child.stdin, TypeError, "stdin is not piped");
assertThrows(() => child.stdout, TypeError, "stdout is not piped");
const readable = child.stderr.pipeThrough(new TextDecoderStream());
const reader = readable.getReader();
const res = await reader.read();
assert(!res.done);
assertEquals(res.value, "hello");
const resEnd = await reader.read();
assert(resEnd.done);
assertEquals(resEnd.value, undefined);
reader.releaseLock();
const status = await child.status;
assertEquals(status.success, true);
assertEquals(status.code, 0);
assertEquals(status.signal, null);
},
);
Deno.test(
{ permissions: { run: true, write: true, read: true } },
async function commandRedirectStdoutStderr() {
const tempDir = await Deno.makeTempDir();
const fileName = tempDir + "/redirected_stdio.txt";
const file = await Deno.open(fileName, {
create: true,
write: true,
});
const command = new Deno.Command(Deno.execPath(), {
args: [
"eval",
"Deno.stderr.write(new TextEncoder().encode('error\\n')); Deno.stdout.write(new TextEncoder().encode('output\\n'));",
],
stdout: "piped",
stderr: "piped",
});
const child = command.spawn();
await child.stdout.pipeTo(file.writable, {
preventClose: true,
});
await child.stderr.pipeTo(file.writable);
await child.status;
const fileContents = await Deno.readFile(fileName);
const decoder = new TextDecoder();
const text = decoder.decode(fileContents);
assertStringIncludes(text, "error");
assertStringIncludes(text, "output");
},
);
Deno.test(
{ permissions: { run: true, write: true, read: true } },
async function commandRedirectStdin() {
const tempDir = await Deno.makeTempDir();
const fileName = tempDir + "/redirected_stdio.txt";
await Deno.writeTextFile(fileName, "hello");
const file = await Deno.open(fileName);
const command = new Deno.Command(Deno.execPath(), {
args: [
"eval",
`
const buffer = new Uint8Array(5);
await Deno.stdin.read(buffer);
if (new TextDecoder().decode(buffer) !== "hello") {
throw new Error('Expected \\'hello\\'')
}
`,
],
stdin: "piped",
stdout: "null",
stderr: "null",
});
const child = command.spawn();
await file.readable.pipeTo(child.stdin, {
preventClose: true,
});
await child.stdin.close();
const status = await child.status;
assertEquals(status.code, 0);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandKillSuccess() {
const command = new Deno.Command(Deno.execPath(), {
args: ["eval", "setTimeout(() => {}, 10000)"],
stdout: "null",
stderr: "null",
});
const child = command.spawn();
child.kill("SIGKILL");
const status = await child.status;
assertEquals(status.success, false);
if (Deno.build.os === "windows") {
assertEquals(status.code, 1);
assertEquals(status.signal, null);
} else {
assertEquals(status.code, 137);
assertEquals(status.signal, "SIGKILL");
}
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function childProcessExplicitResourceManagement() {
let dead = undefined;
{
const command = new Deno.Command(Deno.execPath(), {
args: ["eval", "setTimeout(() => {}, 10000)"],
stdout: "null",
stderr: "null",
});
await using child = command.spawn();
child.status.then(({ signal }) => {
dead = signal;
});
}
if (Deno.build.os == "windows") {
assertEquals(dead, null);
} else {
assertEquals(dead, "SIGTERM");
}
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function childProcessExplicitResourceManagementManualClose() {
const command = new Deno.Command(Deno.execPath(), {
args: ["eval", "setTimeout(() => {}, 10000)"],
stdout: "null",
stderr: "null",
});
await using child = command.spawn();
child.kill("SIGTERM");
await child.status;
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandKillFailed() {
const command = new Deno.Command(Deno.execPath(), {
args: ["eval", "setTimeout(() => {}, 5000)"],
stdout: "null",
stderr: "null",
});
const child = command.spawn();
assertThrows(() => {
// @ts-expect-error testing runtime error of bad signal
child.kill("foobar");
}, TypeError);
await child.status;
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandKillOptional() {
const command = new Deno.Command(Deno.execPath(), {
args: ["eval", "setTimeout(() => {}, 10000)"],
stdout: "null",
stderr: "null",
});
const child = command.spawn();
child.kill();
const status = await child.status;
assertEquals(status.success, false);
if (Deno.build.os === "windows") {
assertEquals(status.code, 1);
assertEquals(status.signal, null);
} else {
assertEquals(status.code, 143);
assertEquals(status.signal, "SIGTERM");
}
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandAbort() {
const ac = new AbortController();
const command = new Deno.Command(Deno.execPath(), {
args: [
"eval",
"setTimeout(console.log, 1e8)",
],
signal: ac.signal,
stdout: "null",
stderr: "null",
});
const child = command.spawn();
queueMicrotask(() => ac.abort());
const status = await child.status;
assertEquals(status.success, false);
if (Deno.build.os === "windows") {
assertEquals(status.code, 1);
assertEquals(status.signal, null);
} else {
assertEquals(status.success, false);
assertEquals(status.code, 143);
}
},
);
Deno.test(
{ permissions: { read: true, run: false } },
async function commandPermissions() {
await assertRejects(async () => {
await new Deno.Command(Deno.execPath(), {
args: ["eval", "console.log('hello world')"],
}).output();
}, Deno.errors.PermissionDenied);
},
);
Deno.test(
{ permissions: { read: true, run: false } },
function commandSyncPermissions() {
assertThrows(() => {
new Deno.Command(Deno.execPath(), {
args: ["eval", "console.log('hello world')"],
}).outputSync();
}, Deno.errors.PermissionDenied);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandSuccess() {
const output = await new Deno.Command(Deno.execPath(), {
args: ["eval", "console.log('hello world')"],
}).output();
assertEquals(output.success, true);
assertEquals(output.code, 0);
assertEquals(output.signal, null);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
function commandSyncSuccess() {
const output = new Deno.Command(Deno.execPath(), {
args: ["eval", "console.log('hello world')"],
}).outputSync();
assertEquals(output.success, true);
assertEquals(output.code, 0);
assertEquals(output.signal, null);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandUrl() {
const output = await new Deno.Command(
new URL(`file:///${Deno.execPath()}`),
{
args: ["eval", "console.log('hello world')"],
},
).output();
assertEquals(new TextDecoder().decode(output.stdout), "hello world\n");
assertEquals(output.success, true);
assertEquals(output.code, 0);
assertEquals(output.signal, null);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
function commandSyncUrl() {
const output = new Deno.Command(
new URL(`file:///${Deno.execPath()}`),
{
args: ["eval", "console.log('hello world')"],
},
).outputSync();
assertEquals(new TextDecoder().decode(output.stdout), "hello world\n");
assertEquals(output.success, true);
assertEquals(output.code, 0);
assertEquals(output.signal, null);
},
);
Deno.test({ permissions: { run: true } }, function commandNotFound() {
assertThrows(
() => new Deno.Command("this file hopefully doesn't exist").output(),
Deno.errors.NotFound,
);
});
Deno.test({ permissions: { run: true } }, function commandSyncNotFound() {
assertThrows(
() => new Deno.Command("this file hopefully doesn't exist").outputSync(),
Deno.errors.NotFound,
);
});
Deno.test({ permissions: { run: true, read: true } }, function cwdNotFound() {
assertThrows(
() =>
new Deno.Command(Deno.execPath(), {
cwd: Deno.cwd() + "/non-existent-directory",
}).output(),
Deno.errors.NotFound,
"No such cwd",
);
});
Deno.test(
{ permissions: { run: true, read: true } },
function cwdNotDirectory() {
assertThrows(
() =>
new Deno.Command(Deno.execPath(), {
cwd: Deno.execPath(),
}).output(),
Deno.errors.NotFound,
"cwd is not a directory",
);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandFailedWithCode() {
const output = await new Deno.Command(Deno.execPath(), {
args: ["eval", "Deno.exit(41 + 1)"],
}).output();
assertEquals(output.success, false);
assertEquals(output.code, 42);
assertEquals(output.signal, null);
},
);
Deno.test(
{ permissions: { run: true, read: true } },
function commandSyncFailedWithCode() {
const output = new Deno.Command(Deno.execPath(), {
args: ["eval", "Deno.exit(41 + 1)"],
}).outputSync();
assertEquals(output.success, false);
assertEquals(output.code, 42);
assertEquals(output.signal, null);
},
);
Deno.test(
{
permissions: { run: true, read: true },
},
async function commandFailedWithSignal() {
const output = await new Deno.Command(Deno.execPath(), {
args: ["eval", "--unstable", "Deno.kill(Deno.pid, 'SIGKILL')"],
}).output();
assertEquals(output.success, false);
if (Deno.build.os === "windows") {
assertEquals(output.code, 1);
assertEquals(output.signal, null);
} else {
assertEquals(output.code, 128 + 9);
assertEquals(output.signal, "SIGKILL");
}
},
);
Deno.test(
{
permissions: { run: true, read: true },
},
function commandSyncFailedWithSignal() {
const output = new Deno.Command(Deno.execPath(), {
args: ["eval", "--unstable", "Deno.kill(Deno.pid, 'SIGKILL')"],
}).outputSync();
assertEquals(output.success, false);
if (Deno.build.os === "windows") {
assertEquals(output.code, 1);
assertEquals(output.signal, null);
} else {
assertEquals(output.code, 128 + 9);
assertEquals(output.signal, "SIGKILL");
}
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandOutput() {
const { stdout } = await new Deno.Command(Deno.execPath(), {
args: [
"eval",
"await Deno.stdout.write(new TextEncoder().encode('hello'))",
],
}).output();
const s = new TextDecoder().decode(stdout);
assertEquals(s, "hello");
},
);
Deno.test(
{ permissions: { run: true, read: true } },
function commandSyncOutput() {
const { stdout } = new Deno.Command(Deno.execPath(), {
args: [
"eval",
"await Deno.stdout.write(new TextEncoder().encode('hello'))",
],
}).outputSync();
const s = new TextDecoder().decode(stdout);
assertEquals(s, "hello");
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandStderrOutput() {
const { stderr } = await new Deno.Command(Deno.execPath(), {
args: [
"eval",
"await Deno.stderr.write(new TextEncoder().encode('error'))",
],
}).output();
const s = new TextDecoder().decode(stderr);
assertEquals(s, "error");
},
);
Deno.test(
{ permissions: { run: true, read: true } },
function commandSyncStderrOutput() {
const { stderr } = new Deno.Command(Deno.execPath(), {
args: [
"eval",
"await Deno.stderr.write(new TextEncoder().encode('error'))",
],
}).outputSync();
const s = new TextDecoder().decode(stderr);
assertEquals(s, "error");
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandEnv() {
const { stdout } = await new Deno.Command(Deno.execPath(), {
args: [
"eval",
"Deno.stdout.write(new TextEncoder().encode(Deno.env.get('FOO') + Deno.env.get('BAR')))",
],
env: {
FOO: "0123",
BAR: "4567",
},
}).output();
const s = new TextDecoder().decode(stdout);
assertEquals(s, "01234567");
},
);
Deno.test(
{ permissions: { run: true, read: true } },
function commandSyncEnv() {
const { stdout } = new Deno.Command(Deno.execPath(), {
args: [
"eval",
"Deno.stdout.write(new TextEncoder().encode(Deno.env.get('FOO') + Deno.env.get('BAR')))",
],
env: {
FOO: "0123",
BAR: "4567",
},
}).outputSync();
const s = new TextDecoder().decode(stdout);
assertEquals(s, "01234567");
},
);
Deno.test(
{ permissions: { run: true, read: true, env: true } },
async function commandClearEnv() {
const { stdout } = await new Deno.Command(Deno.execPath(), {
args: [
"eval",
"-p",
"JSON.stringify(Deno.env.toObject())",
],
clearEnv: true,
env: {
FOO: "23147",
},
}).output();
const obj = JSON.parse(new TextDecoder().decode(stdout));
// can't check for object equality because the OS may set additional env
// vars for processes, so we check if PATH isn't present as that is a common
// env var across OS's and isn't set for processes.
assertEquals(obj.FOO, "23147");
assert(!("PATH" in obj));
},
);
Deno.test(
{ permissions: { run: true, read: true, env: true } },
function commandSyncClearEnv() {
const { stdout } = new Deno.Command(Deno.execPath(), {
args: [
"eval",
"-p",
"JSON.stringify(Deno.env.toObject())",
],
clearEnv: true,
env: {
FOO: "23147",
},
}).outputSync();
const obj = JSON.parse(new TextDecoder().decode(stdout));
// can't check for object equality because the OS may set additional env
// vars for processes, so we check if PATH isn't present as that is a common
// env var across OS's and isn't set for processes.
assertEquals(obj.FOO, "23147");
assert(!("PATH" in obj));
},
);
Deno.test(
{
permissions: { run: true, read: true },
ignore: Deno.build.os === "windows",
},
async function commandUid() {
const { stdout } = await new Deno.Command("id", {
args: ["-u"],
}).output();
const currentUid = new TextDecoder().decode(stdout);
if (currentUid !== "0") {
await assertRejects(async () => {
await new Deno.Command("echo", {
args: ["fhqwhgads"],
uid: 0,
}).output();
}, Deno.errors.PermissionDenied);
}
},
);
Deno.test(
{
permissions: { run: true, read: true },
ignore: Deno.build.os === "windows",
},
function commandSyncUid() {
const { stdout } = new Deno.Command("id", {
args: ["-u"],
}).outputSync();
const currentUid = new TextDecoder().decode(stdout);
if (currentUid !== "0") {
assertThrows(() => {
new Deno.Command("echo", {
args: ["fhqwhgads"],
uid: 0,
}).outputSync();
}, Deno.errors.PermissionDenied);
}
},
);
Deno.test(
{
permissions: { run: true, read: true },
ignore: Deno.build.os === "windows",
},
async function commandGid() {
const { stdout } = await new Deno.Command("id", {
args: ["-g"],
}).output();
const currentGid = new TextDecoder().decode(stdout);
if (currentGid !== "0") {
await assertRejects(async () => {
await new Deno.Command("echo", {
args: ["fhqwhgads"],
gid: 0,
}).output();
}, Deno.errors.PermissionDenied);
}
},
);
Deno.test(
{
permissions: { run: true, read: true },
ignore: Deno.build.os === "windows",
},
function commandSyncGid() {
const { stdout } = new Deno.Command("id", {
args: ["-g"],
}).outputSync();
const currentGid = new TextDecoder().decode(stdout);
if (currentGid !== "0") {
assertThrows(() => {
new Deno.Command("echo", {
args: ["fhqwhgads"],
gid: 0,
}).outputSync();
}, Deno.errors.PermissionDenied);
}
},
);
Deno.test(function commandStdinPipedFails() {
assertThrows(
() =>
new Deno.Command("id", {
stdin: "piped",
}).output(),
TypeError,
"Piped stdin is not supported for this function, use 'Deno.Command.spawn()' instead",
);
});
Deno.test(function spawnSyncStdinPipedFails() {
assertThrows(
() =>
new Deno.Command("id", {
stdin: "piped",
}).outputSync(),
TypeError,
"Piped stdin is not supported for this function, use 'Deno.Command.spawn()' instead",
);
});
Deno.test(
// FIXME(bartlomieju): this test is very flaky on CI, fix it
{
ignore: true,
permissions: { write: true, run: true, read: true },
},
async function commandChildUnref() {
const enc = new TextEncoder();
const cwd = await Deno.makeTempDir({ prefix: "deno_command_test" });
const programFile = "unref.ts";
const program = `
const command = await new Deno.Command(Deno.execPath(), {
cwd: Deno.args[0],
stdout: "piped",
args: ["run", "-A", "--unstable", Deno.args[1]],
});
const child = command.spawn();
const readable = child.stdout.pipeThrough(new TextDecoderStream());
const reader = readable.getReader();
// set up an interval that will end after reading a few messages from stdout,
// to verify that stdio streams are properly unrefed
let count = 0;
let interval;
interval = setInterval(async () => {
count += 1;
if (count > 10) {
clearInterval(interval);
console.log("cleared interval");
}
const res = await reader.read();
if (res.done) {
throw new Error("stream shouldn't be done");
}
if (res.value.trim() != "hello from interval") {
throw new Error("invalid message received");
}
}, 120);
console.log("spawned pid", child.pid);
child.unref();
`;
const childProgramFile = "unref_child.ts";
const childProgram = `
setInterval(() => {
console.log("hello from interval");
}, 100);
`;
Deno.writeFileSync(`${cwd}/${programFile}`, enc.encode(program));
Deno.writeFileSync(`${cwd}/${childProgramFile}`, enc.encode(childProgram));
// In this subprocess we are spawning another subprocess which has
// an infinite interval set. Following call would never resolve unless
// child process gets unrefed.
const { success, stdout, stderr } = await new Deno.Command(
Deno.execPath(),
{
cwd,
args: ["run", "-A", "--unstable", programFile, cwd, childProgramFile],
},
).output();
assert(success);
const stdoutText = new TextDecoder().decode(stdout);
const stderrText = new TextDecoder().decode(stderr);
assert(stderrText.length == 0);
const [line1, line2] = stdoutText.split("\n");
const pidStr = line1.split(" ").at(-1);
assert(pidStr);
assertEquals(line2, "cleared interval");
const pid = Number.parseInt(pidStr, 10);
await Deno.remove(cwd, { recursive: true });
// Child process should have been killed when parent process exits.
assertThrows(() => {
Deno.kill(pid, "SIGTERM");
}, Deno.errors.NotFound);
},
);
Deno.test(
{ ignore: Deno.build.os !== "windows" },
async function commandWindowsRawArguments() {
let { success, stdout } = await new Deno.Command("cmd", {
args: ["/d", "/s", "/c", '"deno ^"--version^""'],
windowsRawArguments: true,
}).output();
assert(success);
let stdoutText = new TextDecoder().decode(stdout);
assertStringIncludes(stdoutText, "deno");
assertStringIncludes(stdoutText, "v8");
assertStringIncludes(stdoutText, "typescript");
({ success, stdout } = new Deno.Command("cmd", {
args: ["/d", "/s", "/c", '"deno ^"--version^""'],
windowsRawArguments: true,
}).outputSync());
assert(success);
stdoutText = new TextDecoder().decode(stdout);
assertStringIncludes(stdoutText, "deno");
assertStringIncludes(stdoutText, "v8");
assertStringIncludes(stdoutText, "typescript");
},
);
Deno.test(
{ permissions: { read: true, run: true } },
async function commandWithPrototypePollution() {
const originalThen = Promise.prototype.then;
const originalSymbolIterator = Array.prototype[Symbol.iterator];
try {
Promise.prototype.then = Array.prototype[Symbol.iterator] = () => {
throw new Error();
};
await new Deno.Command(Deno.execPath(), {
args: ["eval", "console.log('hello world')"],
}).output();
} finally {
Promise.prototype.then = originalThen;
Array.prototype[Symbol.iterator] = originalSymbolIterator;
}
},
);
Deno.test(
{ permissions: { run: true, read: true } },
async function commandKillAfterStatus() {
const command = new Deno.Command(Deno.execPath(), {
args: ["help"],
stdout: "null",
stderr: "null",
});
const child = command.spawn();
await child.status;
assertThrows(
() => child.kill(),
TypeError,
"Child process has already terminated.",
);
},
);
Deno.test(
"process that fails to spawn, prints its name in error",
async () => {
assertThrows(
() => new Deno.Command("doesntexist").outputSync(),
Error,
"Failed to spawn 'doesntexist'",
);
await assertRejects(
async () => await new Deno.Command("doesntexist").output(),
Error,
"Failed to spawn 'doesntexist'",
);
},
);