#[macro_use]
extern crate pretty_assertions;

extern crate bumpalo;
extern crate indoc;
extern crate roc_collections;
extern crate roc_load;
extern crate roc_module;

#[cfg(test)]
mod cli_run {
    use cli_utils::helpers::{
        extract_valgrind_errors, file_path_from_root, fixture_file, fixtures_dir, known_bad_file,
        run_cmd, run_roc, run_with_valgrind, strip_colors, Out, ValgrindError, ValgrindErrorXWhat,
    };
    use const_format::concatcp;
    use indoc::indoc;
    use roc_cli::{CMD_BUILD, CMD_CHECK, CMD_FORMAT, CMD_RUN};
    use roc_test_utils::assert_multiline_str_eq;
    use serial_test::serial;
    use std::iter;
    use std::path::Path;

    const OPTIMIZE_FLAG: &str = concatcp!("--", roc_cli::FLAG_OPTIMIZE);
    const LINKER_FLAG: &str = concatcp!("--", roc_cli::FLAG_LINKER);
    const CHECK_FLAG: &str = concatcp!("--", roc_cli::FLAG_CHECK);
    const PREBUILT_PLATFORM: &str = concatcp!("--", roc_cli::FLAG_PREBUILT, "=true");
    #[allow(dead_code)]
    const TARGET_FLAG: &str = concatcp!("--", roc_cli::FLAG_TARGET);

    #[derive(Debug)]
    enum CliMode {
        RocBuild, // buildOnly
        RocRun,   // buildAndRun
        Roc,      // buildAndRunIfNoErrors
    }

    #[cfg(all(target_os = "linux", target_arch = "x86_64"))]
    const TEST_LEGACY_LINKER: bool = true;

    // Surgical linker currently only supports linux x86_64,
    // so we're always testing the legacy linker on other targets.
    #[cfg(not(all(target_os = "linux", target_arch = "x86_64")))]
    const TEST_LEGACY_LINKER: bool = false;

    #[cfg(all(unix, not(target_os = "macos")))]
    const ALLOW_VALGRIND: bool = true;

    // Disallow valgrind on macOS by default, because it reports a ton
    // of false positives. For local development on macOS, feel free to
    // change this to true!
    #[cfg(target_os = "macos")]
    const ALLOW_VALGRIND: bool = false;

    #[cfg(windows)]
    const ALLOW_VALGRIND: bool = false;

    #[derive(Debug, PartialEq, Eq)]
    enum Arg<'a> {
        ExamplePath(&'a str),
        PlainText(&'a str),
    }

    #[derive(Debug, PartialEq, Eq)]
    struct CliTest<'a> {
        filename: &'a str,
        executable_filename: &'a str,
        stdin: &'a [&'a str],
        arguments: &'a [Arg<'a>],
        env: &'a [(&'a str, &'a str)],
        expected_ending: &'a str,
        use_valgrind: bool,
    }

    fn check_compile_error(file: &Path, flags: &[&str], expected: &str) {
        let compile_out = run_roc(
            [CMD_CHECK, file.to_str().unwrap()].iter().chain(flags),
            &[],
            &[],
        );
        let err = compile_out.stdout.trim();
        let err = strip_colors(err);

        // e.g. "1 error and 0 warnings found in 123 ms."
        let (before_first_digit, _) = err.split_at(err.rfind("found in ").unwrap());
        let err = format!("{}found in <ignored for test> ms.", before_first_digit);

        // make paths consistent
        let err = err.replace('\\', "/");

        // consistency with typewriters, very important
        let err = err.replace('\r', "");

        assert_multiline_str_eq!(err.as_str(), expected);
    }

    fn check_format_check_as_expected(file: &Path, expects_success_exit_code: bool) {
        let out = run_roc([CMD_FORMAT, file.to_str().unwrap(), CHECK_FLAG], &[], &[]);

        assert_eq!(out.status.success(), expects_success_exit_code);
    }

    fn run_roc_on<'a, I: IntoIterator<Item = &'a str>>(
        file: &'a Path,
        args: I,
        stdin: &[&str],
        roc_app_args: &[String],
        env: &[(&str, &str)],
    ) -> Out {
        let compile_out = run_roc(
            // converting these all to String avoids lifetime issues
            args.into_iter()
                .map(|arg| arg.to_string())
                .chain([file.to_str().unwrap().to_string(), "--".to_string()])
                .chain(roc_app_args.iter().cloned()),
            stdin,
            env,
        );

        let ignorable = "🔨 Rebuilding platform...\n";
        let stderr = compile_out.stderr.replacen(ignorable, "", 1);

        // for some reason, llvm prints out this warning when targeting windows
        let ignorable = "warning: ignoring debug info with an invalid version (0) in app\r\n";
        let stderr = stderr.replacen(ignorable, "", 1);

        let is_reporting_runtime = stderr.starts_with("runtime: ") && stderr.ends_with("ms\n");
        if !(stderr.is_empty() || is_reporting_runtime) {
            panic!("`roc` command had unexpected stderr: {}", stderr);
        }

        assert!(
            compile_out.status.success(),
            "bad status stderr:\n{}\nstdout:\n{}",
            compile_out.stderr,
            compile_out.stdout
        );

        compile_out
    }

    #[allow(clippy::too_many_arguments)]
    fn check_output_with_stdin(
        file: &Path,
        stdin: &[&str],
        executable_filename: &str,
        flags: &[&str],
        roc_app_args: &[String],
        extra_env: &[(&str, &str)],
        expected_ending: &str,
        use_valgrind: bool,
        test_many_cli_commands: bool, // buildOnly, buildAndRun and buildAndRunIfNoErrors
    ) {
        // valgrind does not yet support avx512 instructions, see #1963.
        // we can't enable this only when testing with valgrind because of host re-use between tests
        #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
        if is_x86_feature_detected!("avx512f") {
            std::env::set_var("NO_AVX512", "1");
        }

        let cli_commands = if test_many_cli_commands {
            vec![CliMode::RocBuild, CliMode::RocRun, CliMode::Roc]
        } else {
            vec![CliMode::Roc]
        };

        for cli_mode in cli_commands.iter() {
            let flags = {
                let mut vec = flags.to_vec();

                // max-threads segfaults on windows right now
                if !cfg!(windows) {
                    vec.push("--max-threads=1");
                }

                vec.into_iter()
            };

            let out = match cli_mode {
                CliMode::RocBuild => {
                    run_roc_on(
                        file,
                        iter::once(CMD_BUILD).chain(flags.clone()),
                        &[],
                        &[],
                        &[],
                    );

                    if use_valgrind && ALLOW_VALGRIND {
                        let mut valgrind_args = vec![file
                            .with_file_name(executable_filename)
                            .to_str()
                            .unwrap()
                            .to_string()];
                        valgrind_args.extend(roc_app_args.iter().cloned());
                        let (valgrind_out, raw_xml) =
                            run_with_valgrind(stdin.iter().copied(), &valgrind_args);
                        if valgrind_out.status.success() {
                            let memory_errors = extract_valgrind_errors(&raw_xml).unwrap_or_else(|err| {
                                panic!("failed to parse the `valgrind` xml output:\n\n  Error was:\n\n    {:?}\n\n  valgrind xml was:\n\n    \"{}\"\n\n  valgrind stdout was:\n\n    \"{}\"\n\n  valgrind stderr was:\n\n    \"{}\"", err, raw_xml, valgrind_out.stdout, valgrind_out.stderr);
                            });

                            if !memory_errors.is_empty() {
                                for error in memory_errors {
                                    let ValgrindError {
                                        kind,
                                        what: _,
                                        xwhat,
                                    } = error;
                                    println!("Valgrind Error: {}\n", kind);

                                    if let Some(ValgrindErrorXWhat {
                                        text,
                                        leakedbytes: _,
                                        leakedblocks: _,
                                    }) = xwhat
                                    {
                                        println!("    {}", text);
                                    }
                                }
                                panic!("Valgrind reported memory errors");
                            }
                        } else {
                            let exit_code = match valgrind_out.status.code() {
                                Some(code) => format!("exit code {}", code),
                                None => "no exit code".to_string(),
                            };

                            panic!("`valgrind` exited with {}. valgrind stdout was: \"{}\"\n\nvalgrind stderr was: \"{}\"", exit_code, valgrind_out.stdout, valgrind_out.stderr);
                        }

                        valgrind_out
                    } else {
                        run_cmd(
                            file.with_file_name(executable_filename).to_str().unwrap(),
                            stdin.iter().copied(),
                            roc_app_args,
                            extra_env.iter().copied(),
                        )
                    }
                }
                CliMode::Roc => {
                    if !extra_env.is_empty() {
                        // TODO: `roc` and `roc dev` are currently buggy for `env.roc`
                        continue;
                    }
                    run_roc_on(file, flags.clone(), stdin, roc_app_args, extra_env)
                }
                CliMode::RocRun => run_roc_on(
                    file,
                    iter::once(CMD_RUN).chain(flags.clone()),
                    stdin,
                    roc_app_args,
                    extra_env,
                ),
            };

            if !&out.stdout.ends_with(expected_ending) {
                panic!(
                    "expected output to end with {:?} but instead got {:#?} - stderr was: {:#?}",
                    expected_ending, out.stdout, out.stderr
                );
            }

            if !out.status.success() {
                // We don't need stdout, Cargo prints it for us.
                panic!(
                    "Example program exited with status {:?}\nstderr was:\n{:#?}",
                    out.status, out.stderr
                );
            }
        }
    }

    // when you don't need args, stdin or extra_env
    fn test_roc_app_slim(
        dir_name: &str,
        roc_filename: &str,
        executable_filename: &str,
        expected_ending: &str,
        use_valgrind: bool,
    ) {
        test_roc_app(
            dir_name,
            roc_filename,
            executable_filename,
            &[],
            &[],
            &[],
            expected_ending,
            use_valgrind,
            false,
        )
    }

    #[allow(clippy::too_many_arguments)]
    fn test_roc_app(
        dir_name: &str,
        roc_filename: &str,
        executable_filename: &str,
        stdin: &[&str],
        args: &[Arg],
        extra_env: &[(&str, &str)],
        expected_ending: &str,
        use_valgrind: bool,
        test_many_cli_commands: bool, // buildOnly, buildAndRun and buildAndRunIfNoErrors
    ) {
        let file_name = file_path_from_root(dir_name, roc_filename);
        let mut roc_app_args: Vec<String> = Vec::new();

        for arg in args {
            match arg {
                Arg::ExamplePath(file) => {
                    roc_app_args.push(
                        file_path_from_root(dir_name, file)
                            .to_str()
                            .unwrap()
                            .to_string(),
                    );
                }
                Arg::PlainText(arg) => {
                    roc_app_args.push(arg.to_string());
                }
            }
        }

        // workaround for surgical linker issue, see PR #3990
        let mut custom_flags: Vec<&str> = Vec::new();

        match executable_filename {
            "form" | "hello-gui" | "breakout" | "libhello" => {
                // Since these require things the build system often doesn't have
                // (e.g. GUIs open a window, Ruby needs ruby installed, WASM needs a browser)
                // we do `roc build` on them but don't run them.
                run_roc_on(&file_name, [CMD_BUILD, OPTIMIZE_FLAG], &[], &[], &[]);
                return;
            }
            "swiftui" | "rocLovesSwift" => {
                if cfg!(not(target_os = "macos")) {
                    eprintln!(
                        "WARNING: skipping testing example {} because it only works on MacOS.",
                        roc_filename
                    );
                    return;
                } else {
                    run_roc_on(&file_name, [CMD_BUILD, OPTIMIZE_FLAG], &[], &[], &[]);
                    return;
                }
            }
            "rocLovesWebAssembly" => {
                // this is a web assembly example, but we don't test with JS at the moment
                eprintln!(
                    "WARNING: skipping testing example {} because it only works in a browser!",
                    roc_filename
                );
                return;
            }
            "args" => {
                custom_flags = vec![LINKER_FLAG, "legacy"];
            }
            _ => {}
        }

        // Check with and without optimizations
        check_output_with_stdin(
            &file_name,
            stdin,
            executable_filename,
            &custom_flags,
            &roc_app_args,
            extra_env,
            expected_ending,
            use_valgrind,
            test_many_cli_commands,
        );

        custom_flags.push(OPTIMIZE_FLAG);
        // This is mostly because the false interpreter is still very slow -
        // 25s for the cli tests is just not acceptable during development!
        #[cfg(not(debug_assertions))]
        check_output_with_stdin(
            &file_name,
            stdin,
            executable_filename,
            &custom_flags,
            &roc_app_args,
            extra_env,
            expected_ending,
            use_valgrind,
            test_many_cli_commands,
        );

        // Also check with the legacy linker.

        if TEST_LEGACY_LINKER {
            check_output_with_stdin(
                &file_name,
                stdin,
                executable_filename,
                &[LINKER_FLAG, "legacy"],
                &roc_app_args,
                extra_env,
                expected_ending,
                use_valgrind,
                test_many_cli_commands,
            );
        }
    }

    #[test]
    #[serial(cli_platform)]
    fn hello_world() {
        test_roc_app_slim(
            "examples",
            "helloWorld.roc",
            "helloWorld",
            "Hello, World!\n",
            true,
        )
    }

    #[cfg(windows)]
    const LINE_ENDING: &str = "\r\n";
    #[cfg(not(windows))]
    const LINE_ENDING: &str = "\n";

    #[test]
    // uses C platform
    fn platform_switching_main() {
        test_roc_app_slim(
            "examples/platform-switching",
            "main.roc",
            "rocLovesPlatforms",
            &("Which platform am I running on now?".to_string() + LINE_ENDING),
            true,
        )
    }

    // We exclude the C platforming switching example
    // because the main platform switching example runs the c platform.
    // If we don't, a race condition leads to test flakiness.

    #[test]
    fn platform_switching_rust() {
        test_roc_app_slim(
            "examples/platform-switching",
            "rocLovesRust.roc",
            "rocLovesRust",
            "Roc <3 Rust!\n",
            true,
        )
    }

    #[test]
    fn platform_switching_zig() {
        test_roc_app_slim(
            "examples/platform-switching",
            "rocLovesZig.roc",
            "rocLovesZig",
            "Roc <3 Zig!\n",
            true,
        )
    }

    #[test]
    fn platform_switching_wasm() {
        test_roc_app_slim(
            "examples/platform-switching",
            "rocLovesWebAssembly.roc",
            "rocLovesWebAssembly",
            "Roc <3 Web Assembly!\n",
            true,
        )
    }

    #[test]
    fn platform_switching_swift() {
        test_roc_app_slim(
            "examples/platform-switching",
            "rocLovesSwift.roc",
            "rocLovesSwift",
            "Roc <3 Swift!\n",
            true,
        )
    }

    #[test]
    fn ruby_interop() {
        test_roc_app_slim("examples/ruby-interop", "main.roc", "libhello", "", true)
    }

    #[test]
    fn fibonacci() {
        test_roc_app_slim(
            "crates/cli_testing_examples/algorithms",
            "fibonacci.roc",
            "fibonacci",
            "",
            true,
        )
    }

    #[test]
    fn hello_gui() {
        test_roc_app_slim("examples/gui", "hello.roc", "hello-gui", "", false)
    }

    #[test]
    fn breakout() {
        test_roc_app_slim(
            "examples/gui/breakout",
            "breakout.roc",
            "breakout",
            "",
            false,
        )
    }

    #[test]
    fn quicksort() {
        test_roc_app_slim(
            "crates/cli_testing_examples/algorithms",
            "quicksort.roc",
            "quicksort",
            "[0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2]\n",
            true,
        )
    }

    #[test]
    #[serial(cli_platform)]
    fn cli_args() {
        test_roc_app(
            "examples/cli",
            "args.roc",
            "args",
            &[],
            &[
                Arg::PlainText("log"),
                Arg::PlainText("-b"),
                Arg::PlainText("3"),
                Arg::PlainText("--num"),
                Arg::PlainText("81"),
            ],
            &[],
            "4\n",
            false,
            false,
        )
    }

    #[test]
    fn interactive_effects() {
        test_roc_app(
            "examples/cli",
            "effects.roc",
            "effects",
            &["hi there!"],
            &[],
            &[],
            "hi there!\nIt is known\n",
            true,
            false,
        )
    }

    #[test]
    // tea = The Elm Architecture
    fn terminal_ui_tea() {
        test_roc_app(
            "examples/cli",
            "tui.roc",
            "tui",
            &["foo\n"], // NOTE: adding more lines leads to memory leaks
            &[],
            &[],
            "Hello Worldfoo!\n",
            true,
            false,
        )
    }

    #[test]
    fn false_interpreter() {
        test_roc_app(
            "examples/cli/false-interpreter",
            "False.roc",
            "false",
            &[],
            &[Arg::ExamplePath("examples/hello.false")],
            &[],
            "Hello, World!\n",
            false,
            true,
        )
    }

    #[test]
    fn swift_ui() {
        test_roc_app_slim("examples/swiftui", "main.roc", "swiftui", "", false)
    }

    #[test]
    fn static_site_gen() {
        test_roc_app(
            "examples/static-site-gen",
            "static-site.roc",
            "static-site",
            &[],
            &[Arg::ExamplePath("input"), Arg::ExamplePath("output")],
            &[],
            "Processed 3 files with 3 successes and 0 errors\n",
            false,
            false,
        )
    }

    #[test]
    #[serial(cli_platform)]
    fn with_env_vars() {
        test_roc_app(
            "examples/cli",
            "env.roc",
            "env",
            &[],
            &[],
            &[
                ("EDITOR", "roc-editor"),
                ("SHLVL", "3"),
                ("LETTERS", "a,c,e,j"),
            ],
            "Your favorite editor is roc-editor!\n\
            Your current shell level is 3!\n\
            Your favorite letters are: a c e j\n",
            false,
            false,
        )
    }

    #[test]
    fn parse_movies_csv() {
        test_roc_app_slim(
            "examples/parser",
            "parse-movies-csv.roc",
            "parse-movies-csv",
            "Parse success!\n",
            false,
        )
    }

    // TODO not sure if this cfg should still be here: #[cfg(not(debug_assertions))]
    // this is for testing the benchmarks, to perform proper benchmarks see crates/cli/benches/README.md
    mod test_benchmarks {
        use cli_utils::helpers::cli_testing_dir;

        use super::{check_output_with_stdin, OPTIMIZE_FLAG, PREBUILT_PLATFORM};

        use std::{path::Path, sync::Once};

        static BENCHMARKS_BUILD_PLATFORM: Once = Once::new();

        fn test_benchmark(
            roc_filename: &str,
            executable_filename: &str,
            stdin: &[&str],
            expected_ending: &str,
            use_valgrind: bool,
        ) {
            let file_name = cli_testing_dir("benchmarks").join(roc_filename);

            // TODO fix QuicksortApp and then remove this!
            if roc_filename == "QuicksortApp.roc" {
                eprintln!(
                    "WARNING: skipping testing benchmark {} because the test is broken right now!",
                    roc_filename
                );
                return;
            }

            #[cfg(all(not(feature = "wasm32-cli-run"), not(feature = "i386-cli-run")))]
            check_output_regular(
                &file_name,
                stdin,
                executable_filename,
                expected_ending,
                use_valgrind,
            );

            #[cfg(feature = "wasm32-cli-run")]
            check_output_wasm(&file_name, stdin, executable_filename, expected_ending);

            #[cfg(feature = "i386-cli-run")]
            check_output_i386(
                &file_name,
                stdin,
                executable_filename,
                expected_ending,
                use_valgrind,
            );
        }

        #[cfg(all(not(feature = "wasm32-cli-run"), not(feature = "i386-cli-run")))]
        fn check_output_regular(
            file_name: &Path,
            stdin: &[&str],
            executable_filename: &str,
            expected_ending: &str,
            use_valgrind: bool,
        ) {
            let mut ran_without_optimizations = false;

            BENCHMARKS_BUILD_PLATFORM.call_once(|| {
                // Check with and without optimizations
                check_output_with_stdin(
                    file_name,
                    stdin,
                    executable_filename,
                    &[],
                    &[],
                    &[],
                    expected_ending,
                    use_valgrind,
                    false,
                );

                ran_without_optimizations = true;
            });

            // now we can pass the `PREBUILT_PLATFORM` flag, because the
            // `call_once` will have built the platform

            if !ran_without_optimizations {
                // Check with and without optimizations
                check_output_with_stdin(
                    file_name,
                    stdin,
                    executable_filename,
                    &[PREBUILT_PLATFORM],
                    &[],
                    &[],
                    expected_ending,
                    use_valgrind,
                    false,
                );
            }

            check_output_with_stdin(
                file_name,
                stdin,
                executable_filename,
                &[PREBUILT_PLATFORM, OPTIMIZE_FLAG],
                &[],
                &[],
                expected_ending,
                use_valgrind,
                false,
            );
        }

        #[cfg(feature = "wasm32-cli-run")]
        fn check_output_wasm(
            file_name: &Path,
            stdin: &[&str],
            executable_filename: &str,
            expected_ending: &str,
        ) {
            // Check with and without optimizations
            check_wasm_output_with_stdin(
                file_name,
                stdin,
                executable_filename,
                &[],
                expected_ending,
            );

            check_wasm_output_with_stdin(
                file_name,
                stdin,
                executable_filename,
                &[OPTIMIZE_FLAG],
                expected_ending,
            );
        }

        #[cfg(feature = "wasm32-cli-run")]
        fn check_wasm_output_with_stdin(
            file: &Path,
            stdin: &[&str],
            executable_filename: &str,
            flags: &[&str],
            expected_ending: &str,
        ) {
            use super::{concatcp, run_roc, CMD_BUILD, TARGET_FLAG};

            let mut flags = flags.to_vec();
            flags.push(concatcp!(TARGET_FLAG, "=wasm32"));

            let compile_out = run_roc(
                [CMD_BUILD, file.to_str().unwrap()]
                    .iter()
                    .chain(flags.as_slice()),
                &[],
                &[],
            );

            assert!(
                compile_out.status.success(),
                "bad status stderr:\n{}\nstdout:\n{}",
                compile_out.stderr,
                compile_out.stdout
            );

            let mut path = file.with_file_name(executable_filename);
            path.set_extension("wasm");

            let stdout = crate::run_with_wasmer(&path, stdin);

            if !stdout.ends_with(expected_ending) {
                panic!(
                    "expected output to end with {:?} but instead got {:#?}",
                    expected_ending, stdout
                );
            }
        }

        #[cfg(feature = "i386-cli-run")]
        fn check_output_i386(
            file_name: &Path,
            stdin: &[&str],
            executable_filename: &str,
            expected_ending: &str,
            use_valgrind: bool,
        ) {
            check_output_with_stdin(
                &file_name,
                stdin,
                executable_filename,
                &[concatcp!(TARGET_FLAG, "=x86_32")],
                &[],
                expected_ending,
                use_valgrind,
                false,
            );

            check_output_with_stdin(
                &file_name,
                stdin,
                executable_filename,
                &[concatcp!(TARGET_FLAG, "=x86_32"), OPTIMIZE_FLAG],
                &[],
                expected_ending,
                use_valgrind,
                false,
            );
        }

        #[test]
        fn nqueens() {
            test_benchmark("NQueens.roc", "nqueens", &["6"], "4\n", true)
        }

        #[test]
        fn cfold() {
            test_benchmark("CFold.roc", "cfold", &["3"], "11 & 11\n", true)
        }

        #[test]
        fn deriv() {
            test_benchmark(
                "Deriv.roc",
                "deriv",
                &["2"],
                "1 count: 6\n2 count: 22\n",
                true,
            )
        }

        #[test]
        fn rbtree_ck() {
            test_benchmark("RBTreeCk.roc", "rbtree-ck", &["100"], "10\n", true)
        }

        #[test]
        fn rbtree_insert() {
            test_benchmark(
                "RBTreeInsert.roc",
                "rbtree-insert",
                &[],
                "Node Black 0 {} Empty Empty\n",
                true,
            )
        }

        /*
        // rbtree_del does not work
        #[test]
        fn rbtree_del() {
            test_benchmark(
                "RBTreeDel.roc",
                "rbtree-del",
                &["420"],
                &[],
                "30\n",
                true
            )
        }*/

        #[test]
        fn astar() {
            test_benchmark("TestAStar.roc", "test-astar", &[], "True\n", false)
        }

        #[test]
        fn base64() {
            test_benchmark(
                "TestBase64.roc",
                "test-base64",
                &[],
                "encoded: SGVsbG8gV29ybGQ=\ndecoded: Hello World\n",
                true,
            )
        }

        #[test]
        fn closure() {
            test_benchmark("Closure.roc", "closure", &[], "", false)
        }

        #[test]
        fn issue2279() {
            test_benchmark("Issue2279.roc", "issue2279", &[], "Hello, world!\n", true)
        }

        #[test]
        fn quicksort_app() {
            test_benchmark(
                "QuicksortApp.roc",
                "quicksortapp",
                &[],
                "todo put the correct quicksort answer here",
                true,
            )
        }
    }

    #[test]
    #[serial(multi_dep_str)]
    fn run_multi_dep_str_unoptimized() {
        check_output_with_stdin(
            &fixture_file("multi-dep-str", "Main.roc"),
            &[],
            "multi-dep-str",
            &[],
            &[],
            &[],
            "I am Dep2.str2\n",
            true,
            false,
        );
    }

    #[test]
    #[serial(multi_dep_str)]
    fn run_multi_dep_str_optimized() {
        check_output_with_stdin(
            &fixture_file("multi-dep-str", "Main.roc"),
            &[],
            "multi-dep-str",
            &[OPTIMIZE_FLAG],
            &[],
            &[],
            "I am Dep2.str2\n",
            true,
            false,
        );
    }

    #[test]
    #[serial(multi_dep_thunk)]
    fn run_multi_dep_thunk_unoptimized() {
        check_output_with_stdin(
            &fixture_file("multi-dep-thunk", "Main.roc"),
            &[],
            "multi-dep-thunk",
            &[],
            &[],
            &[],
            "I am Dep2.value2\n",
            true,
            false,
        );
    }

    #[test]
    #[serial(multi_dep_thunk)]
    fn run_multi_dep_thunk_optimized() {
        check_output_with_stdin(
            &fixture_file("multi-dep-thunk", "Main.roc"),
            &[],
            "multi-dep-thunk",
            &[OPTIMIZE_FLAG],
            &[],
            &[],
            "I am Dep2.value2\n",
            true,
            false,
        );
    }

    #[test]
    fn known_type_error() {
        check_compile_error(
            &known_bad_file("TypeError.roc"),
            &[],
            indoc!(
                r#"
                ── TYPE MISMATCH ─ ...known_bad/../../../../examples/cli/cli-platform/main.roc ─

                Something is off with the type annotation of the main required symbol:

                2│      requires {} { main : InternalProgram }
                                             ^^^^^^^^^^^^^^^

                This #UserApp.main value is a:

                    Task.Task {} * [Write [Stdout]]

                But the type annotation on main says it should be:

                    InternalProgram.InternalProgram

                Tip: Type comparisons between an opaque type are only ever equal if
                both types are the same opaque type. Did you mean to create an opaque
                type by wrapping it? If I have an opaque type Age := U32 I can create
                an instance of this opaque type by doing @Age 23.


                ── TYPE MISMATCH ─ ...known_bad/../../../../examples/cli/cli-platform/main.roc ─

                This 1st argument to toEffect has an unexpected type:

                9│  mainForHost = InternalProgram.toEffect main
                                                           ^^^^

                This #UserApp.main value is a:

                    Task.Task {} * [Write [Stdout]]

                But toEffect needs its 1st argument to be:

                    InternalProgram.InternalProgram

                Tip: Type comparisons between an opaque type are only ever equal if
                both types are the same opaque type. Did you mean to create an opaque
                type by wrapping it? If I have an opaque type Age := U32 I can create
                an instance of this opaque type by doing @Age 23.

                ────────────────────────────────────────────────────────────────────────────────

                2 errors and 1 warning found in <ignored for test> ms."#
            ),
        );
    }

    #[test]
    fn exposed_not_defined() {
        check_compile_error(
            &known_bad_file("ExposedNotDefined.roc"),
            &[],
            indoc!(
                r#"
                ── MISSING DEFINITION ────────────────── tests/known_bad/ExposedNotDefined.roc ─

                bar is listed as exposed, but it isn't defined in this module.

                You can fix this by adding a definition for bar, or by removing it
                from exposes.

                ────────────────────────────────────────────────────────────────────────────────

                1 error and 0 warnings found in <ignored for test> ms."#
            ),
        );
    }

    #[test]
    fn unused_import() {
        check_compile_error(
            &known_bad_file("UnusedImport.roc"),
            &[],
            indoc!(
                r#"
                ── UNUSED IMPORT ──────────────────────────── tests/known_bad/UnusedImport.roc ─

                Nothing from Symbol is used in this module.

                3│      imports [Symbol.{ Ident }]
                                 ^^^^^^^^^^^^^^^^

                Since Symbol isn't used, you don't need to import it.

                ────────────────────────────────────────────────────────────────────────────────

                0 errors and 1 warning found in <ignored for test> ms."#
            ),
        );
    }

    #[test]
    fn unknown_generates_with() {
        check_compile_error(
            &known_bad_file("UnknownGeneratesWith.roc"),
            &[],
            indoc!(
                r#"
                ── UNKNOWN GENERATES FUNCTION ─────── tests/known_bad/UnknownGeneratesWith.roc ─

                I don't know how to generate the foobar function.

                4│      generates Effect with [after, map, always, foobar]
                                                                   ^^^^^^

                Only specific functions like `after` and `map` can be generated.Learn
                more about hosted modules at TODO.

                ────────────────────────────────────────────────────────────────────────────────

                1 error and 0 warnings found in <ignored for test> ms."#
            ),
        );
    }

    #[test]
    fn format_check_good() {
        check_format_check_as_expected(&fixture_file("format", "Formatted.roc"), true);
    }

    #[test]
    fn format_check_reformatting_needed() {
        check_format_check_as_expected(&fixture_file("format", "NotFormatted.roc"), false);
    }

    #[test]
    fn format_check_folders() {
        // This fails, because "NotFormatted.roc" is present in this folder
        check_format_check_as_expected(&fixtures_dir("format"), false);

        // This doesn't fail, since only "Formatted.roc" and non-roc files are present in this folder
        check_format_check_as_expected(&fixtures_dir("format/formatted_directory"), true);
    }
}

#[allow(dead_code)]
fn run_with_wasmer(wasm_path: &std::path::Path, stdin: &[&str]) -> String {
    use std::io::Write;
    use wasmer::{Instance, Module, Store};

    //    std::process::Command::new("cp")
    //        .args(&[
    //            wasm_path.to_str().unwrap(),
    //            "/home/folkertdev/roc/wasm/nqueens.wasm",
    //        ])
    //        .output()
    //        .unwrap();

    let store = Store::default();
    let module = Module::from_file(&store, wasm_path).unwrap();

    let mut fake_stdin = wasmer_wasi::Pipe::new();
    let fake_stdout = wasmer_wasi::Pipe::new();
    let fake_stderr = wasmer_wasi::Pipe::new();

    for line in stdin {
        write!(fake_stdin, "{}", line).unwrap();
    }

    // First, we create the `WasiEnv`
    use wasmer_wasi::WasiState;
    let mut wasi_env = WasiState::new("hello")
        .stdin(Box::new(fake_stdin))
        .stdout(Box::new(fake_stdout))
        .stderr(Box::new(fake_stderr))
        .finalize()
        .unwrap();

    // Then, we get the import object related to our WASI
    // and attach it to the Wasm instance.
    let import_object = wasi_env
        .import_object(&module)
        .unwrap_or_else(|_| wasmer::imports!());

    let instance = Instance::new(&module, &import_object).unwrap();

    let start = instance.exports.get_function("_start").unwrap();

    match start.call(&[]) {
        Ok(_) => read_wasi_stdout(wasi_env),
        Err(e) => {
            use wasmer_wasi::WasiError;
            match e.downcast::<WasiError>() {
                Ok(WasiError::Exit(0)) => {
                    // we run the `_start` function, so exit(0) is expected
                    read_wasi_stdout(wasi_env)
                }
                other => format!("Something went wrong running a wasm test: {:?}", other),
            }
        }
    }
}

#[allow(dead_code)]
fn read_wasi_stdout(wasi_env: wasmer_wasi::WasiEnv) -> String {
    let mut state = wasi_env.state.lock().unwrap();

    match state.fs.stdout_mut() {
        Ok(Some(stdout)) => {
            let mut buf = String::new();
            stdout.read_to_string(&mut buf).unwrap();

            buf
        }
        _ => todo!(),
    }
}