cc-switch/src-tauri/tests/import_export_sync.rs

use serde_json::json;
use std::{fs, path::Path, sync::RwLock};
use tauri::async_runtime;

use cc_switch_lib::{
    get_claude_settings_path, read_json_file, AppError, AppState, AppType, ConfigService,
    MultiAppConfig, Provider,
};

#[path = "support.rs"]
mod support;
use support::{ensure_test_home, reset_test_fs, test_mutex};

#[test]
fn sync_claude_provider_writes_live_settings() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();

    let mut config = MultiAppConfig::default();
    let provider_config = json!({
        "env": {
            "ANTHROPIC_AUTH_TOKEN": "test-key",
            "ANTHROPIC_BASE_URL": "https://api.test"
        },
        "ui": {
            "displayName": "Test Provider"
        }
    });

    let provider = Provider::with_id(
        "prov-1".to_string(),
        "Test Claude".to_string(),
        provider_config.clone(),
        None,
    );

    let manager = config
        .get_manager_mut(&AppType::Claude)
        .expect("claude manager");
    manager.providers.insert("prov-1".to_string(), provider);
    manager.current = "prov-1".to_string();

    ConfigService::sync_current_providers_to_live(&mut config).expect("sync live settings");

    let settings_path = get_claude_settings_path();
    assert!(
        settings_path.exists(),
        "live settings should be written to {}",
        settings_path.display()
    );

    let live_value: serde_json::Value = read_json_file(&settings_path).expect("read live file");
    assert_eq!(live_value, provider_config);

    // 确认 SSOT 中的供应商也同步了最新内容
    let updated = config
        .get_manager(&AppType::Claude)
        .and_then(|m| m.providers.get("prov-1"))
        .expect("provider in config");
    assert_eq!(updated.settings_config, provider_config);

    // 额外确认写入位置位于测试 HOME 下
    assert!(
        settings_path.starts_with(home),
        "settings path {:?} should reside under test HOME {:?}",
        settings_path,
        home
    );
}

#[test]
fn sync_codex_provider_writes_auth_and_config() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();

    let mut config = MultiAppConfig::default();

    // 添加入测 MCP 启用项，确保 sync_enabled_to_codex 会写入 TOML
    config.mcp.codex.servers.insert(
        "echo-server".into(),
        json!({
            "id": "echo-server",
            "enabled": true,
            "server": {
                "type": "stdio",
                "command": "echo",
                "args": ["hello"]
            }
        }),
    );

    let provider_config = json!({
        "auth": {
            "OPENAI_API_KEY": "codex-key"
        },
        "config": r#"base_url = "https://codex.test""#
    });

    let provider = Provider::with_id(
        "codex-1".to_string(),
        "Codex Test".to_string(),
        provider_config.clone(),
        None,
    );

    let manager = config
        .get_manager_mut(&AppType::Codex)
        .expect("codex manager");
    manager.providers.insert("codex-1".to_string(), provider);
    manager.current = "codex-1".to_string();

    ConfigService::sync_current_providers_to_live(&mut config).expect("sync codex live");

    let auth_path = cc_switch_lib::get_codex_auth_path();
    let config_path = cc_switch_lib::get_codex_config_path();

    assert!(
        auth_path.exists(),
        "auth.json should exist at {}",
        auth_path.display()
    );
    assert!(
        config_path.exists(),
        "config.toml should exist at {}",
        config_path.display()
    );

    let auth_value: serde_json::Value = read_json_file(&auth_path).expect("read auth");
    assert_eq!(
        auth_value,
        provider_config.get("auth").cloned().expect("auth object")
    );

    let toml_text = fs::read_to_string(&config_path).expect("read config.toml");
    assert!(
        toml_text.contains("command = \"echo\""),
        "config.toml should contain serialized enabled MCP server"
    );

    // 当前供应商应同步最新 config 文本
    let manager = config.get_manager(&AppType::Codex).expect("codex manager");
    let synced = manager.providers.get("codex-1").expect("codex provider");
    let synced_cfg = synced
        .settings_config
        .get("config")
        .and_then(|v| v.as_str())
        .expect("config string");
    assert_eq!(synced_cfg, toml_text);
}

#[test]
fn sync_enabled_to_codex_writes_enabled_servers() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();

    let mut config = MultiAppConfig::default();
    config.mcp.codex.servers.insert(
        "stdio-enabled".into(),
        json!({
            "id": "stdio-enabled",
            "enabled": true,
            "server": {
                "type": "stdio",
                "command": "echo",
                "args": ["ok"],
            }
        }),
    );

    cc_switch_lib::sync_enabled_to_codex(&config).expect("sync codex");

    let path = cc_switch_lib::get_codex_config_path();
    assert!(path.exists(), "config.toml should be created");
    let text = fs::read_to_string(&path).expect("read config.toml");
    assert!(
        text.contains("mcp_servers") && text.contains("stdio-enabled"),
        "enabled servers should be serialized"
    );
}

#[test]
fn sync_enabled_to_codex_removes_servers_when_none_enabled() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let path = cc_switch_lib::get_codex_config_path();
    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent).expect("create codex dir");
    }
    fs::write(
        &path,
        r#"[mcp_servers]
disabled = { type = "stdio", command = "noop" }
"#,
    )
    .expect("seed config file");

    let config = MultiAppConfig::default(); // 无启用项
    cc_switch_lib::sync_enabled_to_codex(&config).expect("sync codex");

    let text = fs::read_to_string(&path).expect("read config.toml");
    assert!(
        !text.contains("mcp_servers") && !text.contains("servers"),
        "disabled entries should be removed from config.toml"
    );
}

#[test]
fn sync_enabled_to_codex_returns_error_on_invalid_toml() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let path = cc_switch_lib::get_codex_config_path();
    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent).expect("create codex dir");
    }
    fs::write(&path, "invalid = [").expect("write invalid config");

    let mut config = MultiAppConfig::default();
    config.mcp.codex.servers.insert(
        "broken".into(),
        json!({
            "id": "broken",
            "enabled": true,
            "server": {
                "type": "stdio",
                "command": "echo"
            }
        }),
    );

    let err = cc_switch_lib::sync_enabled_to_codex(&config).expect_err("sync should fail");
    match err {
        cc_switch_lib::AppError::Toml { path, .. } => {
            assert!(
                path.ends_with("config.toml"),
                "path should reference config.toml"
            );
        }
        cc_switch_lib::AppError::McpValidation(msg) => {
            assert!(
                msg.contains("config.toml"),
                "error message should mention config.toml"
            );
        }
        other => panic!("unexpected error: {other:?}"),
    }
}

#[test]
fn sync_codex_provider_missing_auth_returns_error() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();

    let mut config = MultiAppConfig::default();
    let provider = Provider::with_id(
        "codex-missing-auth".to_string(),
        "No Auth".to_string(),
        json!({
            "config": "model = \"test\""
        }),
        None,
    );
    let manager = config
        .get_manager_mut(&AppType::Codex)
        .expect("codex manager");
    manager.providers.insert(provider.id.clone(), provider);
    manager.current = "codex-missing-auth".to_string();

    let err = ConfigService::sync_current_providers_to_live(&mut config)
        .expect_err("sync should fail when auth missing");
    match err {
        cc_switch_lib::AppError::Config(msg) => {
            assert!(msg.contains("auth"), "error message should mention auth");
        }
        other => panic!("unexpected error variant: {other:?}"),
    }

    // 确认未产生任何 live 配置文件
    assert!(
        !cc_switch_lib::get_codex_auth_path().exists(),
        "auth.json should not be created on failure"
    );
    assert!(
        !cc_switch_lib::get_codex_config_path().exists(),
        "config.toml should not be created on failure"
    );
}

#[test]
fn write_codex_live_atomic_persists_auth_and_config() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();

    let auth = json!({ "OPENAI_API_KEY": "dev-key" });
    let config_text = r#"
[mcp_servers.echo]
type = "stdio"
command = "echo"
args = ["ok"]
"#;

    cc_switch_lib::write_codex_live_atomic(&auth, Some(config_text))
        .expect("atomic write should succeed");

    let auth_path = cc_switch_lib::get_codex_auth_path();
    let config_path = cc_switch_lib::get_codex_config_path();
    assert!(auth_path.exists(), "auth.json should be created");
    assert!(config_path.exists(), "config.toml should be created");

    let stored_auth: serde_json::Value =
        cc_switch_lib::read_json_file(&auth_path).expect("read auth");
    assert_eq!(stored_auth, auth, "auth.json should match input");

    let stored_config = std::fs::read_to_string(&config_path).expect("read config");
    assert!(
        stored_config.contains("mcp_servers.echo"),
        "config.toml should contain serialized table"
    );
}

#[test]
fn write_codex_live_atomic_rolls_back_auth_when_config_write_fails() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();

    let auth_path = cc_switch_lib::get_codex_auth_path();
    if let Some(parent) = auth_path.parent() {
        std::fs::create_dir_all(parent).expect("create codex dir");
    }
    std::fs::write(&auth_path, r#"{"OPENAI_API_KEY":"legacy"}"#).expect("seed auth");

    let config_path = cc_switch_lib::get_codex_config_path();
    std::fs::create_dir_all(&config_path).expect("create blocking directory");

    let auth = json!({ "OPENAI_API_KEY": "new-key" });
    let config_text = r#"[mcp_servers.sample]
type = "stdio"
command = "noop"
"#;

    let err = cc_switch_lib::write_codex_live_atomic(&auth, Some(config_text))
        .expect_err("config write should fail when target is directory");
    match err {
        cc_switch_lib::AppError::Io { path, .. } => {
            assert!(
                path.ends_with("config.toml"),
                "io error path should point to config.toml"
            );
        }
        cc_switch_lib::AppError::IoContext { context, .. } => {
            assert!(
                context.contains("config.toml"),
                "error context should mention config path"
            );
        }
        other => panic!("unexpected error variant: {other:?}"),
    }

    let stored = std::fs::read_to_string(&auth_path).expect("read existing auth");
    assert!(
        stored.contains("legacy"),
        "auth.json should roll back to legacy content"
    );
    assert!(
        std::fs::metadata(&config_path)
            .expect("config path metadata")
            .is_dir(),
        "config path should remain a directory after failure"
    );
}

#[test]
fn import_from_codex_adds_servers_from_mcp_servers_table() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let path = cc_switch_lib::get_codex_config_path();
    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent).expect("create codex dir");
    }
    fs::write(
        &path,
        r#"[mcp_servers.echo_server]
type = "stdio"
command = "echo"
args = ["hello"]

[mcp_servers.http_server]
type = "http"
url = "https://example.com"
"#,
    )
    .expect("write codex config");

    let mut config = MultiAppConfig::default();
    let changed = cc_switch_lib::import_from_codex(&mut config).expect("import codex");
    assert!(changed >= 2, "should import both servers");

    let servers = &config.mcp.codex.servers;
    let echo = servers
        .get("echo_server")
        .and_then(|v| v.as_object())
        .expect("echo server");
    assert_eq!(echo.get("enabled").and_then(|v| v.as_bool()), Some(true));
    let server_spec = echo
        .get("server")
        .and_then(|v| v.as_object())
        .expect("server spec");
    assert_eq!(
        server_spec
            .get("command")
            .and_then(|v| v.as_str())
            .unwrap_or(""),
        "echo"
    );

    let http = servers
        .get("http_server")
        .and_then(|v| v.as_object())
        .expect("http server");
    let http_spec = http
        .get("server")
        .and_then(|v| v.as_object())
        .expect("http spec");
    assert_eq!(
        http_spec.get("url").and_then(|v| v.as_str()).unwrap_or(""),
        "https://example.com"
    );
}

#[test]
fn import_from_codex_merges_into_existing_entries() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let path = cc_switch_lib::get_codex_config_path();
    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent).expect("create codex dir");
    }
    fs::write(
        &path,
        r#"[mcp.servers.existing]
type = "stdio"
command = "echo"
"#,
    )
    .expect("write codex config");

    let mut config = MultiAppConfig::default();
    config.mcp.codex.servers.insert(
        "existing".into(),
        json!({
            "id": "existing",
            "name": "existing",
            "enabled": false,
            "server": {
                "type": "stdio",
                "command": "prev"
            }
        }),
    );

    let changed = cc_switch_lib::import_from_codex(&mut config).expect("import codex");
    assert!(changed >= 1, "should mark change for enabled flag");

    let entry = config
        .mcp
        .codex
        .servers
        .get("existing")
        .and_then(|v| v.as_object())
        .expect("existing entry");
    assert_eq!(entry.get("enabled").and_then(|v| v.as_bool()), Some(true));
    let spec = entry
        .get("server")
        .and_then(|v| v.as_object())
        .expect("server spec");
    // 保留原 command，确保导入不会覆盖现有 server 细节
    assert_eq!(spec.get("command").and_then(|v| v.as_str()), Some("prev"));
}

#[test]
fn sync_claude_enabled_mcp_projects_to_user_config() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let mut config = MultiAppConfig::default();

    config.mcp.claude.servers.insert(
        "stdio-enabled".into(),
        json!({
            "id": "stdio-enabled",
            "enabled": true,
            "server": {
                "type": "stdio",
                "command": "echo",
                "args": ["hi"],
            }
        }),
    );
    config.mcp.claude.servers.insert(
        "http-disabled".into(),
        json!({
            "id": "http-disabled",
            "enabled": false,
            "server": {
                "type": "http",
                "url": "https://example.com",
            }
        }),
    );

    cc_switch_lib::sync_enabled_to_claude(&config).expect("sync Claude MCP");

    let claude_path = cc_switch_lib::get_claude_mcp_path();
    assert!(claude_path.exists(), "claude config should exist");
    let text = fs::read_to_string(&claude_path).expect("read .claude.json");
    let value: serde_json::Value = serde_json::from_str(&text).expect("parse claude json");
    let servers = value
        .get("mcpServers")
        .and_then(|v| v.as_object())
        .expect("mcpServers map");
    assert_eq!(servers.len(), 1, "only enabled entries should be written");
    let enabled = servers.get("stdio-enabled").expect("enabled entry");
    assert_eq!(
        enabled
            .get("command")
            .and_then(|v| v.as_str())
            .unwrap_or_default(),
        "echo"
    );
    assert!(servers.get("http-disabled").is_none());
}

#[test]
fn import_from_claude_merges_into_config() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();
    let claude_path = home.join(".claude.json");

    fs::write(
        &claude_path,
        serde_json::to_string_pretty(&json!({
            "mcpServers": {
                "stdio-enabled": {
                    "type": "stdio",
                    "command": "echo",
                    "args": ["hello"]
                }
            }
        }))
        .unwrap(),
    )
    .expect("write claude json");

    let mut config = MultiAppConfig::default();
    config.mcp.claude.servers.insert(
        "stdio-enabled".into(),
        json!({
            "id": "stdio-enabled",
            "name": "stdio-enabled",
            "enabled": false,
            "server": {
                "type": "stdio",
                "command": "prev"
            }
        }),
    );

    let changed = cc_switch_lib::import_from_claude(&mut config).expect("import from claude");
    assert!(changed >= 1, "should mark at least one change");

    let entry = config
        .mcp
        .claude
        .servers
        .get("stdio-enabled")
        .and_then(|v| v.as_object())
        .expect("entry exists");
    assert_eq!(entry.get("enabled").and_then(|v| v.as_bool()), Some(true));
    let server = entry
        .get("server")
        .and_then(|v| v.as_object())
        .expect("server obj");
    assert_eq!(
        server.get("command").and_then(|v| v.as_str()).unwrap_or(""),
        "prev",
        "existing server config should be preserved"
    );
}

#[test]
fn create_backup_skips_missing_file() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();
    let config_path = home.join(".cc-switch").join("config.json");

    // 未创建文件时应返回空字符串，不报错
    let result = ConfigService::create_backup(&config_path).expect("create backup");
    assert!(
        result.is_empty(),
        "expected empty backup id when config file missing"
    );
}

#[test]
fn create_backup_generates_snapshot_file() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();
    let config_dir = home.join(".cc-switch");
    let config_path = config_dir.join("config.json");
    fs::create_dir_all(&config_dir).expect("prepare config dir");
    fs::write(&config_path, r#"{"version":2}"#).expect("write config file");

    let backup_id = ConfigService::create_backup(&config_path).expect("backup success");
    assert!(
        !backup_id.is_empty(),
        "backup id should contain timestamp information"
    );

    let backup_path = config_dir.join("backups").join(format!("{backup_id}.json"));
    assert!(
        backup_path.exists(),
        "expected backup file at {}",
        backup_path.display()
    );

    let backup_content = fs::read_to_string(&backup_path).expect("read backup");
    assert!(
        backup_content.contains(r#""version":2"#),
        "backup content should match original config"
    );
}

#[test]
fn create_backup_retains_only_latest_entries() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();
    let config_dir = home.join(".cc-switch");
    let config_path = config_dir.join("config.json");
    fs::create_dir_all(&config_dir).expect("prepare config dir");
    fs::write(&config_path, r#"{"version":3}"#).expect("write config file");

    let backups_dir = config_dir.join("backups");
    fs::create_dir_all(&backups_dir).expect("create backups dir");
    for idx in 0..12 {
        let manual = backups_dir.join(format!("manual_{idx:02}.json"));
        fs::write(&manual, format!("{{\"idx\":{idx}}}")).expect("seed manual backup");
    }

    std::thread::sleep(std::time::Duration::from_secs(1));

    let latest_backup_id =
        ConfigService::create_backup(&config_path).expect("create backup with cleanup");
    assert!(
        !latest_backup_id.is_empty(),
        "backup id should not be empty when config exists"
    );

    let entries: Vec<_> = fs::read_dir(&backups_dir)
        .expect("read backups dir")
        .filter_map(|entry| entry.ok())
        .collect();
    assert!(
        entries.len() <= 10,
        "expected backups to be trimmed to at most 10 files, got {}",
        entries.len()
    );

    let latest_path = backups_dir.join(format!("{latest_backup_id}.json"));
    assert!(
        latest_path.exists(),
        "latest backup {} should be preserved",
        latest_path.display()
    );

    // 进一步确认保留的条目包含一些历史文件，说明清理逻辑仅裁剪多余部分
    let manual_kept = entries
        .iter()
        .filter_map(|entry| entry.file_name().into_string().ok())
        .any(|name| name.starts_with("manual_"));
    assert!(
        manual_kept,
        "cleanup should keep part of the older backups to maintain history"
    );
}

#[test]
fn import_config_from_path_overwrites_state_and_creates_backup() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();

    let config_dir = home.join(".cc-switch");
    fs::create_dir_all(&config_dir).expect("create config dir");
    let config_path = config_dir.join("config.json");
    fs::write(&config_path, r#"{"version":1}"#).expect("seed original config");

    let import_payload = serde_json::json!({
        "version": 2,
        "claude": {
            "providers": {
                "p-new": {
                    "id": "p-new",
                    "name": "Test Claude",
                    "settingsConfig": {
                        "env": { "ANTHROPIC_API_KEY": "new-key" }
                    }
                }
            },
            "current": "p-new"
        },
        "codex": {
            "providers": {},
            "current": ""
        },
        "mcp": {
            "claude": { "servers": {} },
            "codex": { "servers": {} }
        }
    });

    let import_path = config_dir.join("import.json");
    fs::write(
        &import_path,
        serde_json::to_string_pretty(&import_payload).expect("serialize import payload"),
    )
    .expect("write import file");

    let app_state = AppState {
        config: RwLock::new(MultiAppConfig::default()),
    };

    let backup_id = ConfigService::import_config_from_path(&import_path, &app_state)
        .expect("import should succeed");
    assert!(
        !backup_id.is_empty(),
        "expected backup id when original config exists"
    );

    let backup_path = config_dir.join("backups").join(format!("{backup_id}.json"));
    assert!(
        backup_path.exists(),
        "backup file should exist at {}",
        backup_path.display()
    );

    let updated_content = fs::read_to_string(&config_path).expect("read updated config");
    let parsed: serde_json::Value =
        serde_json::from_str(&updated_content).expect("parse updated config");
    assert_eq!(
        parsed
            .get("claude")
            .and_then(|c| c.get("current"))
            .and_then(|c| c.as_str()),
        Some("p-new"),
        "saved config should record new current provider"
    );

    let guard = app_state.config.read().expect("lock state after import");
    let claude_manager = guard
        .get_manager(&AppType::Claude)
        .expect("claude manager in state");
    assert_eq!(
        claude_manager.current, "p-new",
        "state should reflect new current provider"
    );
    assert!(
        claude_manager.providers.contains_key("p-new"),
        "new provider should exist in state"
    );
}

#[test]
fn import_config_from_path_invalid_json_returns_error() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();

    let config_dir = home.join(".cc-switch");
    fs::create_dir_all(&config_dir).expect("create config dir");

    let invalid_path = config_dir.join("broken.json");
    fs::write(&invalid_path, "{ not-json ").expect("write invalid json");

    let app_state = AppState {
        config: RwLock::new(MultiAppConfig::default()),
    };

    let err = ConfigService::import_config_from_path(&invalid_path, &app_state)
        .expect_err("import should fail");
    match err {
        AppError::Json { .. } => {}
        other => panic!("expected json error, got {other:?}"),
    }
}

#[test]
fn import_config_from_path_missing_file_produces_io_error() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let _home = ensure_test_home();

    let missing_path = Path::new("/nonexistent/import.json");
    let app_state = AppState {
        config: RwLock::new(MultiAppConfig::default()),
    };

    let err = ConfigService::import_config_from_path(missing_path, &app_state)
        .expect_err("import should fail for missing file");
    match err {
        AppError::Io { .. } => {}
        other => panic!("expected io error, got {other:?}"),
    }
}

#[test]
fn export_config_to_file_writes_target_path() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();

    let config_dir = home.join(".cc-switch");
    fs::create_dir_all(&config_dir).expect("create config dir");
    let config_path = config_dir.join("config.json");
    fs::write(&config_path, r#"{"version":42,"flag":true}"#).expect("write config");

    let export_path = home.join("exported-config.json");
    if export_path.exists() {
        fs::remove_file(&export_path).expect("cleanup export target");
    }

    let result = async_runtime::block_on(cc_switch_lib::export_config_to_file(
        export_path.to_string_lossy().to_string(),
    ))
    .expect("export should succeed");
    assert_eq!(result.get("success").and_then(|v| v.as_bool()), Some(true));

    let exported = fs::read_to_string(&export_path).expect("read exported file");
    assert!(
        exported.contains(r#""version":42"#) && exported.contains(r#""flag":true"#),
        "exported file should mirror source config content"
    );
}

#[test]
fn export_config_to_file_returns_error_when_source_missing() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
    let home = ensure_test_home();

    let export_path = home.join("export-missing.json");
    if export_path.exists() {
        fs::remove_file(&export_path).expect("cleanup export target");
    }

    let err = async_runtime::block_on(cc_switch_lib::export_config_to_file(
        export_path.to_string_lossy().to_string(),
    ))
    .expect_err("export should fail when config.json missing");
    assert!(
        err.contains("IO 错误"),
        "expected IO error message, got {err}"
    );
}