monochromatic-git-policy-cli 0.3.0

Repository-owned Git policy wrapper: forwards Git commands and checks commits against configured policies.
Documentation 
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//! Binary-level controls for the fixtures themselves: where they live and that they go away however their test ends
//! (issue 1809).

use super::support::{FIXTURE_ROOT_VARIABLE, Fixture, fixture, settle_fixture};
use std::path::{Path, PathBuf};

/// A fixture whose test panics after creating it leaves nothing behind.
#[test]
fn a_fixture_is_removed_when_its_test_panics() {
    let (sender, receiver) = std::sync::mpsc::channel::<PathBuf>();
    let handle = std::thread::spawn(move || {
        let created: Fixture = fixture("drop-on-panic");
        std::fs::write(created.root.join("file"), "content").expect("file");
        sender.send(created.root.clone()).expect("send the root");
        panic!("the test fails before it removes its fixture");
    });
    assert!(handle.join().is_err(), "the thread panics on purpose");
    let root: PathBuf = receiver.recv().expect("the root");
    assert!(!root.exists(), "{} was left behind", root.display());
}

/// A fixture removed explicitly and then dropped does not fail the drop.
#[test]
fn a_fixture_removed_explicitly_is_dropped_quietly() {
    let created: Fixture = fixture("drop-after-remove");
    let root: PathBuf = created.root.clone();
    super::support::remove(&created);
    assert!(!root.exists());
    drop(created);
}

/// Settling keeps a tree on request, removes it otherwise, and accepts a tree that is already gone.
#[test]
fn settling_keeps_removes_and_accepts_a_tree_that_is_gone() {
    let created: Fixture = fixture("settle");
    let root: &Path = created.root.as_path();
    std::fs::write(root.join("file"), "content").expect("file");
    settle_fixture(root, true);
    assert!(root.join("file").exists(), "a kept fixture stays");
    settle_fixture(root, false);
    assert!(!root.exists(), "a settled fixture goes");
    settle_fixture(root, false);
}

/// Fixtures are created in Cargo's per-target scratch directory, not in the system temporary directory, unless the
/// person moved the root on purpose.
#[test]
fn fixtures_are_created_outside_the_system_temporary_directory() {
    if std::env::var_os(FIXTURE_ROOT_VARIABLE).is_some() {
        return;
    }
    let created: Fixture = fixture("location");
    assert!(
        created.root.starts_with(std::fs::canonicalize(env!("CARGO_TARGET_TMPDIR")).expect("target scratch")),
        "{} is not under the target scratch directory",
        created.root.display()
    );
}