juliaup 1.12.0

Julia installer and version multiplexer
Documentation 
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use assert_cmd::Command;
use assert_fs::prelude::*;
use predicates::prelude::*;
use std::path::Path;

#[test]
fn command_initial_setup() {
    let depot_dir = assert_fs::TempDir::new().unwrap();

    depot_dir
        .child(Path::new("juliaup"))
        .assert(predicate::path::missing());

    Command::cargo_bin("juliaup")
        .unwrap()
        .arg("46029ef5-0b73-4a71-bff3-d0d05de42aac")
        .env("JULIA_DEPOT_PATH", depot_dir.path())
        .env("JULIAUP_DEPOT_PATH", depot_dir.path())
        .assert()
        .success()
        .stdout("");

    depot_dir
        .child(Path::new("juliaup").join("juliaup.json"))
        .assert(predicate::path::exists());
}