perfgate-cli 0.17.0

CLI for perfgate performance budgets and baseline diffs
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//! Integration tests for `perfgate probe`.

mod common;

use common::perfgate_cmd;
use predicates::prelude::*;
use serde_json::{Value, json};
use std::fs;
use std::path::Path;
use tempfile::tempdir;

#[test]
fn test_probe_compare_writes_probe_compare_receipt() {
    let temp_dir = tempdir().expect("failed to create temp dir");
    let baseline_path = temp_dir.path().join("baseline-probes.json");
    let current_path = temp_dir.path().join("current-probes.json");
    let output_path = temp_dir.path().join("probe-compare.json");

    write_probe_receipt(
        &baseline_path,
        "baseline-run",
        &[
            ("parser.tokenize", "local", 12.0),
            ("parser.ast_build", "dominant", 40.0),
        ],
    );
    write_probe_receipt(
        &current_path,
        "current-run",
        &[
            ("parser.tokenize", "local", 13.0),
            ("parser.ast_build", "dominant", 36.0),
        ],
    );

    perfgate_cmd()
        .arg("probe")
        .arg("compare")
        .arg("--baseline")
        .arg(&baseline_path)
        .arg("--current")
        .arg(&current_path)
        .arg("--out")
        .arg(&output_path)
        .assert()
        .success()
        .stderr(predicate::str::contains("Probe compare receipt written"));

    let receipt: Value = serde_json::from_str(
        &fs::read_to_string(&output_path).expect("failed to read probe compare receipt"),
    )
    .expect("probe compare receipt should be JSON");
    let typed: perfgate_types::ProbeCompareReceipt =
        serde_json::from_value(receipt.clone()).expect("probe compare receipt should deserialize");

    assert_eq!(typed.schema, "perfgate.probe_compare.v1");
    assert_eq!(typed.scenario.as_deref(), Some("large_file_parse"));
    assert_eq!(typed.probes.len(), 2);
    assert_eq!(typed.verdict.status, perfgate_types::VerdictStatus::Warn);
    assert_eq!(receipt["probes"][0]["deltas"]["wall_ms"]["baseline"], 40.0);
    assert_eq!(receipt["probes"][0]["deltas"]["wall_ms"]["current"], 36.0);
    assert_eq!(receipt["probes"][0]["status"], "pass");
    assert_eq!(receipt["probes"][1]["name"], "parser.tokenize");
    assert_eq!(receipt["probes"][1]["status"], "warn");
}

#[test]
fn test_probe_compare_warns_on_missing_probe() {
    let temp_dir = tempdir().expect("failed to create temp dir");
    let baseline_path = temp_dir.path().join("baseline-probes.json");
    let current_path = temp_dir.path().join("current-probes.json");
    let output_path = temp_dir.path().join("probe-compare.json");

    write_probe_receipt(
        &baseline_path,
        "baseline-run",
        &[("parser.tokenize", "local", 12.0)],
    );
    write_probe_receipt(
        &current_path,
        "current-run",
        &[("parser.ast_build", "dominant", 36.0)],
    );

    perfgate_cmd()
        .arg("probe")
        .arg("compare")
        .arg("--baseline")
        .arg(&baseline_path)
        .arg("--current")
        .arg(&current_path)
        .arg("--out")
        .arg(&output_path)
        .assert()
        .success();

    let typed: perfgate_types::ProbeCompareReceipt = serde_json::from_str(
        &fs::read_to_string(&output_path).expect("failed to read probe compare receipt"),
    )
    .expect("probe compare receipt should deserialize");

    assert_eq!(typed.verdict.status, perfgate_types::VerdictStatus::Warn);
    assert!(
        typed
            .warnings
            .iter()
            .any(|warning| warning.contains("missing from current"))
    );
}

fn write_probe_receipt(path: &Path, run_id: &str, probes: &[(&str, &str, f64)]) {
    let observations: Vec<_> = probes
        .iter()
        .map(|(name, scope, wall_ms)| {
            json!({
                "name": name,
                "parent": "parser.total",
                "scope": scope,
                "metrics": {
                    "wall_ms": {
                        "value": wall_ms,
                        "unit": "ms"
                    }
                }
            })
        })
        .collect();

    let receipt = json!({
        "schema": "perfgate.probe.v1",
        "tool": {"name": "perfgate-ingest", "version": "0.16.0"},
        "run": {
            "id": run_id,
            "started_at": "2026-05-08T00:00:00Z",
            "ended_at": "2026-05-08T00:00:01Z",
            "host": {"os": "linux", "arch": "x86_64"}
        },
        "bench": {
            "name": "parser",
            "command": ["cargo", "bench"],
            "repeat": probes.len(),
            "warmup": 0
        },
        "scenario": "large_file_parse",
        "probes": observations
    });

    fs::write(
        path,
        serde_json::to_string_pretty(&receipt).expect("serialize probe receipt"),
    )
    .expect("failed to write probe receipt");
}