rust/tests/compile-test.rs

#![feature(test)]

extern crate compiletest_rs as compiletest;
extern crate test;

use std::ffi::OsStr;
use std::fs;
use std::error::Error;
use std::env::{set_var, var};
use std::path::{Path, PathBuf};

fn clippy_driver_path() -> PathBuf {
    if let Some(path) = option_env!("CLIPPY_DRIVER_PATH") {
        PathBuf::from(path)
    } else {
        PathBuf::from(concat!("target/", env!("PROFILE"), "/clippy-driver"))
    }
}

fn host_libs() -> PathBuf {
    if let Some(path) = option_env!("HOST_LIBS") {
        PathBuf::from(path)
    } else {
        Path::new("target").join(env!("PROFILE"))
    }
}

fn rustc_test_suite() -> Option<PathBuf> {
    option_env!("RUSTC_TEST_SUITE").map(PathBuf::from)
}

fn rustc_lib_path() -> PathBuf {
    option_env!("RUSTC_LIB_PATH").unwrap().into()
}

fn config(mode: &str, dir: &str) -> compiletest::Config {
    let mut config = compiletest::Config::default();

    let cfg_mode = mode.parse().expect("Invalid mode");
    if let Ok(name) = var::<&str>("TESTNAME") {
        let s: String = name.to_owned();
        config.filter = Some(s)
    }

    if rustc_test_suite().is_some() {
        config.run_lib_path = rustc_lib_path();
        config.compile_lib_path = rustc_lib_path();
    }
    config.target_rustcflags = Some(format!("-L {0} -L {0}/deps -Dwarnings", host_libs().display()));

    config.mode = cfg_mode;
    config.build_base = if rustc_test_suite().is_some() {
        // we don't need access to the stderr files on travis
        let mut path = PathBuf::from(env!("OUT_DIR"));
        path.push("test_build_base");
        path
    } else {
        let mut path = std::env::current_dir().unwrap();
        path.push("target/debug/test_build_base");
        path
    };
    config.src_base = PathBuf::from(format!("tests/{}", dir));
    config.rustc_path = clippy_driver_path();
    config
}

fn run_mode(mode: &str, dir: &str) {
    compiletest::run_tests(&config(mode, dir));
}

fn run_ui_toml() -> Result<(), Box<Error>> {
    let base = PathBuf::from("tests/ui-toml/").canonicalize()?;
    for dir in fs::read_dir(&base)? {
        let dir = dir?;
        if !dir.file_type()?.is_dir() {
            continue;
        }
        let dir_path = dir.path();
        set_var("CARGO_MANIFEST_DIR", &dir_path);
        let config = config("ui", "ui-toml");
        for file in fs::read_dir(&dir_path)? {
            let file = file?;
            let file_path = file.path();
            if !file.file_type()?.is_file() {
                continue;
            }
            if file_path.extension() != Some(OsStr::new("rs")) {
                continue;
            }
            let paths = compiletest::common::TestPaths {
                file: file_path,
                base: base.clone(),
                relative_dir: dir_path.file_name().unwrap().into(),
            };
            compiletest::runtest::run(config.clone(), &paths);
        }
    }
    Ok(())
}

fn prepare_env() {
    set_var("CLIPPY_DISABLE_DOCS_LINKS", "true");
    set_var("CLIPPY_TESTS", "true");
    //set_var("RUST_BACKTRACE", "0");
}

#[test]
fn compile_test() {
    prepare_env();
    run_mode("run-pass", "run-pass");
    run_mode("ui", "ui");
    run_ui_toml().unwrap();
}