monochromatic-git-policy-cli 0.5.17

Repository-owned Git policy wrapper: forwards Git commands and checks commits against configured policies.
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//! Controls for the name of a worktree's service instance.

use super::*;
use crate::test_support::{fixture, remove};

/// Two worktrees of one repository have two instances, and one worktree has one however its directory is spelled.
#[test]
fn an_instance_belongs_to_one_worktrees_own_git_directory() {
    let root = fixture("instance-names");
    let main = root.join("main/.git");
    let linked = root.join("main/.git/worktrees/linked");
    std::fs::create_dir_all(&linked).expect("directories");
    assert_ne!(instance_of(main.as_path()), instance_of(linked.as_path()), "two worktrees, two instances");
    assert_eq!(instance_of(main.as_path()), instance_of(main.as_path()));
    let spelled = root.join("main/.git/worktrees/../");
    assert_eq!(instance_of(main.as_path()), instance_of(spelled.as_path()), "a relative part names the same directory");
    let link = root.join("link-to-main");
    std::os::unix::fs::symlink(&main, &link).expect("link");
    assert_eq!(instance_of(main.as_path()), instance_of(link.as_path()), "a link names the same directory");
    remove(root.as_path());
}

/// The suite names a worktree's service in TypeScript (`e2e/service-launch-fixture.ts`); this vector is pinned there too, so
///  the two cannot drift apart.
#[test]
fn the_name_of_a_path_that_cannot_be_resolved_is_pinned() {
    assert_eq!(instance_of(Path::new("/nonexistent/instance-vector")), "b82882c15388721fd60c7ae28508d85b");
}

/// The name fits a unit name and a socket path whatever the directory is called.
#[test]
fn the_name_is_short_and_plain_for_any_directory() {
    let long = Path::new("/home/someone/a/very/long/path").join("x".repeat(400));
    let name = instance_of(long.as_path());
    assert_eq!(name.len(), INSTANCE_LENGTH);
    assert!(name.bytes().all(|byte| { return byte.is_ascii_hexdigit(); }), "{name}");
    assert!(socket_path(Path::new("/run/user/1000"), name.as_str()).as_os_str().len() < 108, "a socket path must fit sun_path");
    assert!(socket_unit_instance(name.as_str()).len() < 255 && service_unit_instance(name.as_str()).len() < 255);
}

/// The socket is the instance's, under the runtime directory, and never the shared one an earlier release listened on.
#[test]
fn the_socket_is_the_instances_own() {
    let runtime = Path::new("/run/user/1000");
    let socket = socket_for(runtime, Path::new("/work/repo/.git"));
    assert!(socket.starts_with("/run/user/1000/cli-git"));
    assert_ne!(socket, runtime.join(LEGACY_SOCKET_RELATIVE));
    assert_eq!(socket, socket_path(runtime, instance_of(Path::new("/work/repo/.git")).as_str()));
}