Function testExitCode

tests/unit/child_process.test.ts:164–178

(
      exitCodeValue: number | string,
      expectedCode: number
    )

  it("should have a process exitCode", async () => {
    const testExitCode = async (
      exitCodeValue: number | string,
      expectedCode: number
    ) => {
      const proc = spawn(process.argv0, [
        "-e",
        `process.exitCode = ${exitCodeValue}`,
      ]);
      await new Promise<void>((resolve) => {
        proc.on("exit", (code) => {
          expect(code).toEqual(expectedCode);
          resolve();
        });
      });
    };

    await testExitCode(241212341, 181);
    await testExitCode(-1, 255);