bun.sh/test/js/web/console/console-log.test.ts

import { file, spawn } from "bun";
import { expect, it } from "bun:test";
import { bunEnv, bunExe } from "harness";
import { join } from "node:path";

it("should log to console correctly", async () => {
  const { stdout, stderr, exited } = spawn({
    cmd: [bunExe(), join(import.meta.dir, "console-log.js")],
    stdin: "inherit",
    stdout: "pipe",
    stderr: "pipe",
    env: bunEnv,
  });
  const exitCode = await exited;
  const err = (await new Response(stderr).text()).replaceAll("\r\n", "\n");
  const out = (await new Response(stdout).text()).replaceAll("\r\n", "\n");
  const expected = (await new Response(file(join(import.meta.dir, "console-log.expected.txt"))).text()).replaceAll(
    "\r\n",
    "\n",
  );

  const errMatch = err === "uh oh\n";
  const outmatch = out === expected;

  if (errMatch && outmatch && exitCode === 0) {
    expect().pass();
    return;
  }

  console.error(err);
  console.log("Length of output:", out.length);
  console.log("Length of expected:", expected.length);
  console.log("Exit code:", exitCode);

  expect(out).toBe(expected);
  expect(err).toBe("uh oh\n");
  expect(exitCode).toBe(0);
});

it("long arrays get cutoff", () => {
  const proc = Bun.spawnSync({
    cmd: [bunExe(), "-e", `console.log(Array(1000).fill(0))`],
    env: bunEnv,
    stdio: ["inherit", "pipe", "pipe"],
  });
  expect(proc.exitCode).toBe(0);
  expect(proc.stderr.toString("utf8")).toBeEmpty();
  expect(proc.stdout.toString("utf8")).toEqual(
    "[\n" +
      "  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n" +
      "  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n" +
      "  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n" +
      "  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,\n" +
      "  ... 900 more items\n" +
      "]\n" +
      "",
  );
});

it("console.group", async () => {
  const proc = Bun.spawnSync({
    cmd: [bunExe(), join(import.meta.dir, "console-group.fixture.js")],
    env: bunEnv,
    stdio: ["inherit", "pipe", "pipe"],
  });
  expect(proc.exitCode).toBe(0);
  expect(proc.stderr.toString("utf8").replaceAll("\r\n", "\n").trim()).toMatchSnapshot("console-group-error");
  expect(proc.stdout.toString("utf8").replaceAll("\r\n", "\n").trim()).toMatchSnapshot("console-group-output");
});