podup 3.0.2

Translate and run docker-compose files on rootless Podman
Documentation 
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//! Unit tests for `stats` — split out to keep the module inside the source line
//! limit, following the same `tests.rs` split used by `autostart` and the libpod
//! client.

use super::*;

#[test]
fn format_bytes_scales_units() {
	assert_eq!(format_bytes(512), "512B");
	assert_eq!(format_bytes(1024), "1.0KiB");
	assert_eq!(format_bytes(1536), "1.5KiB");
	assert_eq!(format_bytes(1024 * 1024), "1.0MiB");
	assert_eq!(format_bytes(3 * 1024 * 1024 * 1024), "3.0GiB");
}

#[test]
fn format_row_sums_network_and_shows_name() {
	let mut network = HashMap::new();
	network.insert("eth0".to_string(), NetStat { rx: 1024, tx: 2048 });
	let s = ContainerStat {
		name: "proj-web".into(),
		cpu: 12.5,
		mem_usage: 1024 * 1024,
		mem_limit: 1024 * 1024 * 1024,
		mem_perc: 0.1,
		block_in: 0,
		block_out: 0,
		pids: 3,
		network,
	};
	let row = format_row_with(&s, false, false);
	assert!(row.contains("proj-web"));
	assert!(row.contains("12.50%"));
	assert!(row.contains("1.0MiB"));
	assert!(row.contains('3'));
}

#[test]
fn truncate_name_shortens_long_names_with_ellipsis() {
	let short = "proj-web-1";
	assert_eq!(truncate_name(short, false), short);
	// Exactly the column width is kept verbatim.
	let exact = "a".repeat(NAME_WIDTH);
	assert_eq!(truncate_name(&exact, false), exact);
	// One over the width is truncated to width-1 chars plus an ellipsis.
	let long = "a".repeat(NAME_WIDTH + 10);
	let cut = truncate_name(&long, false);
	assert_eq!(cut.chars().count(), NAME_WIDTH);
	assert!(cut.ends_with('…'));
	// `--no-trunc` keeps the full name regardless of length.
	assert_eq!(truncate_name(&long, true), long);
}

#[test]
fn format_row_truncates_long_name_but_no_trunc_keeps_it() {
	let s = ContainerStat {
		name: "really-long-project-web-container-name-1".into(),
		..Default::default()
	};
	// Default: the long name is truncated (ellipsis present, full name gone).
	let row = format_row_with(&s, false, false);
	assert!(row.contains('…'));
	assert!(!row.contains(&s.name));
	// `--no-trunc`: the full name survives intact.
	let row_full = format_row_with(&s, true, false);
	assert!(row_full.contains(&s.name));
}

#[test]
fn stat_json_row_emits_numeric_fields() {
	let mut network = HashMap::new();
	network.insert("eth0".to_string(), NetStat { rx: 100, tx: 200 });
	let s = ContainerStat {
		name: "proj-db-1".into(),
		cpu: 5.5,
		mem_usage: 2048,
		mem_limit: 4096,
		mem_perc: 50.0,
		block_in: 1,
		block_out: 2,
		pids: 7,
		network,
	};
	let row = stat_json_row(&s);
	assert_eq!(row["Name"], "proj-db-1");
	assert_eq!(row["CPUPerc"], 5.5);
	assert_eq!(row["MemUsage"], 2048);
	assert_eq!(row["MemLimit"], 4096);
	assert_eq!(row["NetInput"], 100);
	assert_eq!(row["NetOutput"], 200);
	assert_eq!(row["PIDs"], 7);
}

#[test]
fn frame_rows_keeps_running_and_adds_stopped_zeros_sorted() {
	let report = StatsReport {
		stats: vec![
			ContainerStat {
				name: "proj-web-1".into(),
				cpu: 1.0,
				..Default::default()
			},
			// Not in `running` → must be dropped (stale daemon sample).
			ContainerStat {
				name: "other".into(),
				..Default::default()
			},
		],
	};
	let mut running = HashSet::new();
	running.insert("proj-web-1".to_string());
	let stopped = vec!["proj-db-1".to_string()];
	let rows = frame_rows(&report, &running, &stopped);
	// Sorted: db (stopped) before web (running); the unrelated sample is gone.
	assert_eq!(rows.len(), 2);
	assert_eq!(rows[0].name, "proj-db-1");
	assert_eq!(rows[0].cpu, 0.0);
	assert_eq!(rows[1].name, "proj-web-1");
	assert_eq!(rows[1].cpu, 1.0);
}

#[test]
fn frame_rows_without_all_has_no_stopped_rows() {
	let report = StatsReport::default();
	let running = HashSet::new();
	// `--all` off → caller passes an empty `stopped` slice → no rows.
	let rows = frame_rows(&report, &running, &[]);
	assert!(rows.is_empty());
}

#[test]
fn stat_tolerates_null_network() {
	// libpod sends `"Network": null` for a container with no interfaces; it
	// must deserialize to an empty map rather than erroring.
	let json = r#"{"Name":"proj-web","CPU":1.0,"Network":null}"#;
	let stat: ContainerStat = serde_json::from_str(json).unwrap();
	assert_eq!(stat.name, "proj-web");
	assert!(stat.network.is_empty());
}

#[test]
fn stat_tolerates_missing_network() {
	let json = r#"{"Name":"proj-web"}"#;
	let stat: ContainerStat = serde_json::from_str(json).unwrap();
	assert!(stat.network.is_empty());
}

#[test]
fn containers_query_repeats_param_per_container() {
	// libpod wants `containers` repeated, not comma-joined — a comma-joined
	// list is read as a single container name and 404s.
	let mut wanted = HashSet::new();
	wanted.insert("proj-web-1".to_string());
	wanted.insert("proj-db-1".to_string());
	assert_eq!(
		containers_query(&wanted),
		"&containers=proj-db-1&containers=proj-web-1"
	);
}

#[test]
fn containers_query_empty_when_none_wanted() {
	assert_eq!(containers_query(&HashSet::new()), "");
}

fn name_set(names: &[&str]) -> HashSet<String> {
	names.iter().map(|s| s.to_string()).collect()
}

#[test]
fn stats_stream_break_is_fatal_only_while_a_sampled_container_still_runs() {
	let sampled = name_set(&["proj-web-1", "proj-db-1"]);

	// A sampled container is still running: the stream truncated a live sample,
	// so the error is a real failure (#1080) — the exit code a monitor needs.
	assert!(stats_stream_broke_mid_sample(
		&sampled,
		&name_set(&["proj-web-1"])
	));

	// Every sampled container has stopped: the stream ended because there was
	// nothing left to sample, and the missing terminal frame is the
	// finished-vs-broken ambiguity (#1104), not a fault.
	assert!(!stats_stream_broke_mid_sample(&sampled, &HashSet::new()));

	// A different, unrelated container is running (e.g. another project): it was
	// never sampled, so it does not make this stream's end a failure.
	assert!(!stats_stream_broke_mid_sample(
		&sampled,
		&name_set(&["other-app-1"])
	));
}

#[test]
fn stats_stream_break_with_no_sampled_containers_is_never_fatal() {
	// Nothing was being sampled, so no end can be a truncated-sample failure.
	assert!(!stats_stream_broke_mid_sample(
		&HashSet::new(),
		&name_set(&["proj-web-1"])
	));
}

#[test]
fn first_unknown_service_flags_typos() {
	let file =
		crate::parse_str("services:\n  web:\n    image: nginx\n  db:\n    image: postgres\n")
			.unwrap();
	assert_eq!(first_unknown_service(&file, &[]), None);
	assert_eq!(
		first_unknown_service(&file, &["web".into(), "db".into()]),
		None
	);
	assert_eq!(
		first_unknown_service(&file, &["web".into(), "bogus".into()]),
		Some("bogus")
	);
}