codex/codex-rs/core/src/safety_tests.rs

use super::*;
use codex_protocol::models::PermissionProfile;
use codex_protocol::permissions::NetworkSandboxPolicy;
use codex_protocol::protocol::FileSystemAccessMode;
use codex_protocol::protocol::FileSystemPath;
use codex_protocol::protocol::FileSystemSandboxEntry;
use codex_protocol::protocol::FileSystemSpecialPath;
use codex_protocol::protocol::GranularApprovalConfig;
use codex_utils_absolute_path::AbsolutePathBuf;
use core_test_support::PathExt;
use pretty_assertions::assert_eq;
use tempfile::TempDir;

#[test]
fn test_writable_roots_constraint() {
    // Use a temporary directory as our workspace to avoid touching
    // the real current working directory.
    let tmp = TempDir::new().unwrap();
    let cwd = tmp.path().abs();
    let parent = cwd.parent().unwrap();

    // Helper to build a single‑entry patch that adds a file at `p`.
    let make_add_change =
        |p: AbsolutePathBuf| ApplyPatchAction::new_add_for_test(&p, "".to_string());

    let add_inside = make_add_change(cwd.join("inner.txt"));
    let add_outside = make_add_change(parent.join("outside.txt"));

    // Policy limited to the workspace only; exclude system temp roots so
    // only `cwd` is writable by default.
    let workspace_only_file_system_policy =
        FileSystemSandboxPolicy::workspace_write(&[], true, true);

    assert!(is_write_patch_constrained_to_writable_paths(
        &add_inside,
        &workspace_only_file_system_policy,
        &cwd,
    ));

    assert!(!is_write_patch_constrained_to_writable_paths(
        &add_outside,
        &workspace_only_file_system_policy,
        &cwd,
    ));

    // With the parent dir explicitly added as a writable root, the
    // outside write should be permitted.
    let file_system_policy_with_parent =
        FileSystemSandboxPolicy::workspace_write(std::slice::from_ref(&parent), true, true);
    assert!(is_write_patch_constrained_to_writable_paths(
        &add_outside,
        &file_system_policy_with_parent,
        &cwd,
    ));
}

#[test]
fn external_sandbox_auto_approves_in_on_request() {
    let tmp = TempDir::new().unwrap();
    let cwd = tmp.path().abs();
    let add_inside_path = cwd.join("inner.txt");
    let add_inside = ApplyPatchAction::new_add_for_test(&add_inside_path, "".to_string());

    let permission_profile = PermissionProfile::External {
        network: NetworkSandboxPolicy::Enabled,
    };
    let file_system_sandbox_policy = FileSystemSandboxPolicy::external_sandbox();

    assert_eq!(
        assess_patch_safety(
            &add_inside,
            AskForApproval::OnRequest,
            &permission_profile,
            &file_system_sandbox_policy,
            &cwd,
            WindowsSandboxLevel::Disabled
        ),
        SafetyCheck::AutoApprove {
            sandbox_type: SandboxType::None,
            user_explicitly_approved: false,
        }
    );
}

#[test]
fn granular_with_all_flags_true_matches_on_request_for_out_of_root_patch() {
    let tmp = TempDir::new().unwrap();
    let cwd = tmp.path().abs();
    let parent = cwd.parent().unwrap();
    let outside_path = parent.join("outside.txt");
    let add_outside = ApplyPatchAction::new_add_for_test(&outside_path, "".to_string());
    let permission_profile = PermissionProfile::workspace_write_with(
        &[],
        NetworkSandboxPolicy::Restricted,
        /*exclude_tmpdir_env_var*/ true,
        /*exclude_slash_tmp*/ true,
    );
    let file_system_sandbox_policy = permission_profile.file_system_sandbox_policy();

    assert_eq!(
        assess_patch_safety(
            &add_outside,
            AskForApproval::OnRequest,
            &permission_profile,
            &file_system_sandbox_policy,
            &cwd,
            WindowsSandboxLevel::Disabled,
        ),
        SafetyCheck::AskUser,
    );
    assert_eq!(
        assess_patch_safety(
            &add_outside,
            AskForApproval::Granular(GranularApprovalConfig {
                sandbox_approval: true,
                rules: true,
                skill_approval: true,
                request_permissions: true,
                mcp_elicitations: true,
            }),
            &permission_profile,
            &file_system_sandbox_policy,
            &cwd,
            WindowsSandboxLevel::Disabled,
        ),
        SafetyCheck::AskUser,
    );
}

#[test]
fn granular_sandbox_approval_false_rejects_out_of_root_patch() {
    let tmp = TempDir::new().unwrap();
    let cwd = tmp.path().abs();
    let parent = cwd.parent().unwrap();
    let outside_path = parent.join("outside.txt");
    let add_outside = ApplyPatchAction::new_add_for_test(&outside_path, "".to_string());
    let permission_profile = PermissionProfile::workspace_write_with(
        &[],
        NetworkSandboxPolicy::Restricted,
        /*exclude_tmpdir_env_var*/ true,
        /*exclude_slash_tmp*/ true,
    );
    let file_system_sandbox_policy = permission_profile.file_system_sandbox_policy();

    assert_eq!(
        assess_patch_safety(
            &add_outside,
            AskForApproval::Granular(GranularApprovalConfig {
                sandbox_approval: false,
                rules: true,
                skill_approval: true,
                request_permissions: true,
                mcp_elicitations: true,
            }),
            &permission_profile,
            &file_system_sandbox_policy,
            &cwd,
            WindowsSandboxLevel::Disabled,
        ),
        SafetyCheck::Reject {
            reason: PATCH_REJECTED_OUTSIDE_PROJECT_REASON.to_string(),
        },
    );
}

#[test]
fn read_only_policy_rejects_patch_with_read_only_reason() {
    let tmp = TempDir::new().unwrap();
    let cwd = tmp.path().abs();
    let inside_path = cwd.join("inside.txt");
    let action = ApplyPatchAction::new_add_for_test(&inside_path, "".to_string());
    let permission_profile = PermissionProfile::read_only();
    let file_system_sandbox_policy = permission_profile.file_system_sandbox_policy();

    assert!(!is_write_patch_constrained_to_writable_paths(
        &action,
        &file_system_sandbox_policy,
        &cwd,
    ));
    assert_eq!(
        assess_patch_safety(
            &action,
            AskForApproval::Never,
            &permission_profile,
            &file_system_sandbox_policy,
            &cwd,
            WindowsSandboxLevel::Disabled,
        ),
        SafetyCheck::Reject {
            reason: PATCH_REJECTED_READ_ONLY_REASON.to_string(),
        },
    );
}
#[test]
fn explicit_unreadable_paths_prevent_auto_approval_for_external_sandbox() {
    let tmp = TempDir::new().unwrap();
    let cwd = tmp.path().abs();
    let blocked_path = cwd.join("blocked.txt");
    let blocked_absolute = blocked_path;
    let action = ApplyPatchAction::new_add_for_test(&blocked_absolute, "".to_string());
    let permission_profile = PermissionProfile::External {
        network: NetworkSandboxPolicy::Restricted,
    };
    let file_system_sandbox_policy = FileSystemSandboxPolicy::restricted(vec![
        FileSystemSandboxEntry {
            path: FileSystemPath::Special {
                value: FileSystemSpecialPath::Root,
            },
            access: FileSystemAccessMode::Write,
        },
        FileSystemSandboxEntry {
            path: FileSystemPath::Path {
                path: blocked_absolute,
            },
            access: FileSystemAccessMode::None,
        },
    ]);

    assert!(!is_write_patch_constrained_to_writable_paths(
        &action,
        &file_system_sandbox_policy,
        &cwd,
    ));
    assert_eq!(
        assess_patch_safety(
            &action,
            AskForApproval::OnRequest,
            &permission_profile,
            &file_system_sandbox_policy,
            &cwd,
            WindowsSandboxLevel::Disabled,
        ),
        SafetyCheck::AskUser,
    );
}

#[test]
fn explicit_read_only_subpaths_prevent_auto_approval_for_external_sandbox() {
    let tmp = TempDir::new().unwrap();
    let cwd = tmp.path().abs();
    let blocked_path = cwd.join("docs").join("blocked.txt");
    let blocked_absolute = blocked_path;
    let docs_absolute = AbsolutePathBuf::resolve_path_against_base("docs", &cwd);
    let action = ApplyPatchAction::new_add_for_test(&blocked_absolute, "".to_string());
    let permission_profile = PermissionProfile::External {
        network: NetworkSandboxPolicy::Restricted,
    };
    let file_system_sandbox_policy = FileSystemSandboxPolicy::restricted(vec![
        FileSystemSandboxEntry {
            path: FileSystemPath::Special {
                value: FileSystemSpecialPath::project_roots(/*subpath*/ None),
            },
            access: FileSystemAccessMode::Write,
        },
        FileSystemSandboxEntry {
            path: FileSystemPath::Path {
                path: docs_absolute,
            },
            access: FileSystemAccessMode::Read,
        },
    ]);

    assert!(!is_write_patch_constrained_to_writable_paths(
        &action,
        &file_system_sandbox_policy,
        &cwd,
    ));
    assert_eq!(
        assess_patch_safety(
            &action,
            AskForApproval::OnRequest,
            &permission_profile,
            &file_system_sandbox_policy,
            &cwd,
            WindowsSandboxLevel::Disabled,
        ),
        SafetyCheck::AskUser,
    );
}

#[test]
fn missing_project_dot_codex_config_requires_approval() {
    let tmp = TempDir::new().unwrap();
    let cwd = tmp.path().abs();
    let config_path = cwd.join(".codex").join("config.toml");
    let action = ApplyPatchAction::new_add_for_test(&config_path, "".to_string());
    let permission_profile = PermissionProfile::workspace_write_with(
        &[],
        NetworkSandboxPolicy::Restricted,
        /*exclude_tmpdir_env_var*/ true,
        /*exclude_slash_tmp*/ true,
    );
    let file_system_sandbox_policy = FileSystemSandboxPolicy::restricted(vec![
        FileSystemSandboxEntry {
            path: FileSystemPath::Special {
                value: FileSystemSpecialPath::Root,
            },
            access: FileSystemAccessMode::Read,
        },
        FileSystemSandboxEntry {
            path: FileSystemPath::Special {
                value: FileSystemSpecialPath::project_roots(/*subpath*/ None),
            },
            access: FileSystemAccessMode::Write,
        },
        FileSystemSandboxEntry {
            path: FileSystemPath::Path {
                path: cwd.join(".codex"),
            },
            access: FileSystemAccessMode::Read,
        },
    ]);

    assert!(!is_write_patch_constrained_to_writable_paths(
        &action,
        &file_system_sandbox_policy,
        &cwd,
    ));
    assert_eq!(
        assess_patch_safety(
            &action,
            AskForApproval::OnRequest,
            &permission_profile,
            &file_system_sandbox_policy,
            &cwd,
            WindowsSandboxLevel::Disabled,
        ),
        SafetyCheck::AskUser,
    );
}