ripr 0.3.0

Static RIPR mutation-exposure analysis for Rust workspaces
Documentation 
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use std::path::{Path, PathBuf};
use std::process::{Command, Output};

fn run_ripr(args: &[&str]) -> Output {
    let bin = env!("CARGO_BIN_EXE_ripr");
    Command::new(bin).args(args).output().unwrap()
}

fn workspace_root() -> PathBuf {
    Path::new(env!("CARGO_MANIFEST_DIR"))
        .parent()
        .and_then(Path::parent)
        .unwrap()
        .to_path_buf()
}

fn sample_diff() -> PathBuf {
    Path::new(env!("CARGO_MANIFEST_DIR")).join("examples/sample/example.diff")
}

fn assert_success(output: &Output) {
    assert!(
        output.status.success(),
        "expected command to succeed\nstdout:\n{}\nstderr:\n{}",
        String::from_utf8_lossy(&output.stdout),
        String::from_utf8_lossy(&output.stderr)
    );
}

#[test]
fn version_runs() {
    let output = run_ripr(&["--version"]);
    assert_success(&output);
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(stdout.contains("ripr"));
}

#[test]
fn help_runs() {
    let output = run_ripr(&["--help"]);
    assert_success(&output);
    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(stdout.contains("static RIPR"));
}

#[test]
fn check_human_output_reports_sample_findings() {
    let root = workspace_root().display().to_string();
    let diff = sample_diff();
    assert!(diff.exists());

    let diff = diff.display().to_string();
    let output = run_ripr(&["check", "--root", &root, "--diff", &diff]);
    assert_success(&output);

    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(stdout.contains("Summary: 5 probe(s)"));
    assert!(stdout.contains("Static exposure: weakly_exposed"));
    assert!(stdout.contains("Static exposure: infection_unknown"));
    assert!(stdout.contains("Recommended next step:"));
}

#[test]
fn check_json_output_has_stable_contract_fields() {
    let root = workspace_root().display().to_string();
    let diff = sample_diff().display().to_string();
    let output = run_ripr(&["check", "--root", &root, "--diff", &diff, "--json"]);
    assert_success(&output);

    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(stdout.contains(r#""schema_version": "0.1""#));
    assert!(stdout.contains(r#""classification": "weakly_exposed""#));
    assert!(stdout.contains(r#""classification": "infection_unknown""#));
    assert!(stdout.contains(r#""recommended_next_step""#));
}

#[test]
fn explain_returns_targeted_probe_details() {
    let root = workspace_root().display().to_string();
    let diff = sample_diff().display().to_string();
    let output = run_ripr(&[
        "explain",
        "--root",
        &root,
        "--diff",
        &diff,
        "probe:crates_ripr_examples_sample_src_lib.rs:21:error_path",
    ]);
    assert_success(&output);

    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(stdout.contains("Static exposure: weakly_exposed (error_path, value)"));
    assert!(stdout.contains("No exact error variant discriminator was detected"));
}

#[test]
fn context_json_returns_probe_and_discriminator_guidance() {
    let root = workspace_root().display().to_string();
    let diff = sample_diff().display().to_string();
    let output = run_ripr(&[
        "context",
        "--root",
        &root,
        "--diff",
        &diff,
        "--at",
        "probe:crates_ripr_examples_sample_src_lib.rs:21:error_path",
        "--json",
    ]);
    assert_success(&output);

    let stdout = String::from_utf8_lossy(&output.stdout);
    assert!(
        stdout.contains(r#""id": "probe:crates_ripr_examples_sample_src_lib.rs:21:error_path""#)
    );
    assert!(stdout.contains(r#""discriminate": "weak""#));
    assert!(stdout.contains(r#""missing""#));
}

#[test]
fn explain_unknown_probe_fails_with_clear_error() {
    let root = workspace_root().display().to_string();
    let diff = sample_diff().display().to_string();
    let output = run_ripr(&[
        "explain",
        "--root",
        &root,
        "--diff",
        &diff,
        "probe:missing:0:not_real",
    ]);
    assert!(!output.status.success());

    let stderr = String::from_utf8_lossy(&output.stderr);
    assert!(stderr.contains("no finding matched"));
}