testing-conventions 0.0.42

//! E2E tests for the TypeScript coverage rule (#31): drive the built CLI binary
//! end-to-end (no mocks) against the fixture codebases and assert the exit code.
//! Requires Node with the fixtures' vitest toolchain installed (see the suite's
//! `package.json`).

use std::path::{Path, PathBuf};
use std::process::Command;

fn fixtures() -> PathBuf {
    PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("tests/fixtures/unit_coverage/typescript")
}

/// Exit code + captured stderr of `testing-conventions unit coverage --language typescript <dir>`.
fn unit_coverage_output(dir: &Path) -> (i32, String) {
    let out = Command::new(env!("CARGO_BIN_EXE_testing-conventions"))
        .args(["unit", "coverage", "--language", "typescript"])
        .arg(dir)
        .output()
        .expect("the built binary should run");
    (
        out.status
            .code()
            .expect("the process should exit with a code"),
        String::from_utf8_lossy(&out.stderr).into_owned(),
    )
}

#[test]
fn missing_toolchain_fails_clean_without_downloading() {
    // End-to-end: with no vitest installed, the binary must fail with a clear error and
    // never download vitest — it runs only the project's own install via `npx --no-install`.
    let dir =
        std::env::temp_dir().join(format!("tc-ts-cov-e2e-notoolchain-{}", std::process::id()));
    std::fs::create_dir_all(&dir).unwrap();
    let (code, stderr) = unit_coverage_output(&dir);
    let _ = std::fs::remove_dir_all(&dir);
    assert_ne!(
        code, 0,
        "a missing toolchain should fail the run; stderr: {stderr}"
    );
    assert!(
        stderr.contains("npx --no-install"),
        "the error should name the no-download invocation; got: {stderr}"
    );
}

/// Exit code of `testing-conventions unit coverage --language typescript --config <cfg> <codebase>`.
fn unit_coverage_exit(codebase: &str, config: &str) -> i32 {
    Command::new(env!("CARGO_BIN_EXE_testing-conventions"))
        .args(["unit", "coverage", "--language", "typescript", "--config"])
        .arg(fixtures().join(config))
        .arg(fixtures().join(codebase))
        .status()
        .expect("the built binary should run")
        .code()
        .expect("the process should exit with a code")
}

#[test]
fn full_exits_zero_against_a_100_floor() {
    assert_eq!(unit_coverage_exit("full", "ts_full.toml"), 0);
}

#[test]
fn above_exits_nonzero_against_a_100_floor() {
    assert_eq!(unit_coverage_exit("above", "ts_full.toml"), 1);
}

#[test]
fn above_exits_zero_against_the_mid_floor() {
    assert_eq!(unit_coverage_exit("above", "ts_mid.toml"), 0);
}

#[test]
fn below_exits_nonzero_against_the_mid_floor() {
    assert_eq!(unit_coverage_exit("below", "ts_mid.toml"), 1);
}

#[test]
fn exempt_cov_exits_zero_with_the_shim_exempted() {
    // The config exempts shim.ts from coverage, so the built binary omits it from
    // the denominator and clears the 100 floor end-to-end (#32).
    assert_eq!(
        unit_coverage_exit("exempt_cov", "ts_full_exempt_shim.toml"),
        0
    );
}

// Zero-config (#80): a `--config` pointing at a file that doesn't exist falls
// back to the default TypeScript floors — now all four metrics at 100 (#194), the
// same floors as `ts_full.toml`. So only `full` (100% on all four) clears the
// default; `above` (which cleared the old 80/75 default) and `below` both fail.

#[test]
fn full_exits_zero_with_no_config_via_the_default_floor() {
    assert_eq!(unit_coverage_exit("full", "no-such-config.toml"), 0);
}

#[test]
fn above_exits_nonzero_with_no_config_via_the_default_floor() {
    // Cleared the old 80/75 default; the strict 100 default (#194) fails it.
    assert_eq!(unit_coverage_exit("above", "no-such-config.toml"), 1);
}

#[test]
fn below_exits_nonzero_with_no_config_via_the_default_floor() {
    assert_eq!(unit_coverage_exit("below", "no-such-config.toml"), 1);
}