envmnt 0.4.0

Environment variables utility functions.
Documentation 
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extern crate envmnt;

#[test]
fn get() {
    let mut exists = envmnt::exists("STRING_TEST_ENV");
    assert!(!exists);

    envmnt::set("STRING_TEST_ENV", "1");
    exists = envmnt::exists("STRING_TEST_ENV");
    assert!(exists);

    let optional_value = envmnt::get_set("STRING_TEST_ENV", "2");
    exists = envmnt::exists("STRING_TEST_ENV");
    assert!(exists);
    assert_eq!(optional_value.unwrap(), "1");

    let mut value = envmnt::get_or("STRING_TEST_ENV", "3");
    assert_eq!(value, "2");

    envmnt::remove("STRING_TEST_ENV");
    value = envmnt::get_or("STRING_TEST_ENV", "3");
    assert_eq!(value, "3");

    let was_env_set =
        envmnt::set_optional("STRING_TEST_SET_OPTIONAL_SOME", &Some("OPTIONAL VALUE"));
    assert!(was_env_set);
    assert!(envmnt::is_equal(
        "STRING_TEST_SET_OPTIONAL_SOME",
        "OPTIONAL VALUE"
    ));
}