test('sends Streams', withServer, async (t, server, got) => {
	server.post('/', defaultEndpoint);

	const {body} = await got.post({body: toReadableStream('wow')});
	t.is(body, 'wow');
});

const downloadEndpoint = (_request, response) => {
	response.setHeader('content-length', file.length);

	toReadableStream(file)
		.pipe(new SlowStream({maxWriteInterval: 50}))
		.pipe(response);
};

test('`content-length` header with Stream body', withServer, async (t, server, got) => {
	server.post('/', echoHeaders);

	const {body} = await got.post({body: toReadableStream('wow')});
	const headers = JSON.parse(body);
	t.is(headers['transfer-encoding'], 'chunked', 'likely failed to get headers at all');
	t.is(headers['content-length'], undefined);
});

test('upload progress - stream with unknown body size', withServer, async (t, server, got) => {
	server.post('/', uploadEndpoint);

	const events = [];

	const request = got.stream.post('')
		.on('uploadProgress', event => events.push(event));

	await getStream(toReadableStream(file).pipe(request));

	checkEvents(t, events);
});

test('accepts `options.body` as a Stream', withServer, async (t, server, got) => {
	server.post('/', postHandler);

	const stream = got.stream.post({body: toReadableStream('wow')});
	t.is(await getStream(stream), 'wow');
});

	setImmediate(async () => {
		try {
			for (const hook of options.hooks.beforeRequest) {
				// eslint-disable-next-line no-await-in-loop
				await hook(options);
			}

			// Serialize body
			const {body, headers} = options;
			const isForm = !is.nullOrUndefined(options.form);
			const isJSON = !is.nullOrUndefined(options.json);
			const isBody = !is.nullOrUndefined(body);
			if ((isBody || isForm || isJSON) && withoutBody.has(options.method)) {
				throw new TypeError(`The \`${options.method}\` method cannot be used with a body`);
			}

			if (isBody) {
				if (isForm || isJSON) {
					throw new TypeError('The `body` option cannot be used with the `json` option or `form` option');
				}

				if (is.object(body) && isFormData(body)) {
					// Special case for https://github.com/form-data/form-data
					headers['content-type'] = headers['content-type'] || `multipart/form-data; boundary=${body.getBoundary()}`;
				} else if (!is.nodeStream(body) && !is.string(body) && !is.buffer(body)) {
					throw new TypeError('The `body` option must be a stream.Readable, string, Buffer, Object or Array');
				}
			} else if (isForm) {
				if (!is.object(options.form)) {
					throw new TypeError('The `form` option must be an Object');
				}

				headers['content-type'] = headers['content-type'] || 'application/x-www-form-urlencoded';
				options.body = (new URLSearchParams(options.form)).toString();
			} else if (isJSON) {
				headers['content-type'] = headers['content-type'] || 'application/json';
				options.body = JSON.stringify(options.json);
			}

			// Convert buffer to stream to receive upload progress events (#322)
			if (is.buffer(body)) {
				options.body = toReadableStream(body);
				uploadBodySize = body.length;
			} else {
				uploadBodySize = await getBodySize(options);
			}

			if (is.undefined(headers['content-length']) && is.undefined(headers['transfer-encoding'])) {
				if ((uploadBodySize > 0 || options.method === 'PUT') && !is.undefined(uploadBodySize)) {
					headers['content-length'] = uploadBodySize;
				}
			}

			if (!options.stream && options.responseType === 'json' && is.undefined(headers.accept)) {
				options.headers.accept = 'application/json';
			}

			requestUrl = options.href || (new URL(options.path, urlLib.format(options))).toString();

			await get(options);
		} catch (error) {
			emitError(error);
		}
	});