walletkit-db 0.20.0

Encrypted on-device storage primitives for WalletKit (SQLCipher wrapper, vault, content-addressed blobs, key envelope).
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//! Shared test helpers. `#[cfg(test)]` only — never compiled into the
//! production binary.

use std::sync::OnceLock;

use crate::sqlite::Connection;

/// Ensures sqlite3mc's global codec registration is complete before any test
/// body runs.
///
/// sqlite3mc registers its cipher implementations the first time
/// `sqlite3_open_v2` is called. When the test binary runs all tests in
/// parallel threads, two threads can race inside that one-time
/// initialization and one of them sees an "unknown cipher 'chacha20'"
/// error even though chacha20 is compiled in.
///
/// Calling this at the start of every test ensures exactly one thread
/// performs the first open (all others block on the `OnceLock`) so that
/// by the time any test-specific code runs, sqlite3mc is fully initialized.
pub fn init_sqlite() {
    static INIT: OnceLock<()> = OnceLock::new();
    INIT.get_or_init(|| {
        drop(Connection::open_in_memory().expect("sqlite3mc pre-init"));
    });
}