use mmap_cache::{FileBuilder, MmapCache};

const INDEX_PATH: &str = "/tmp/mmap_cache_index";
const VALUES_PATH: &str = "/tmp/mmap_cache_values";

// Serialize to files. As required by the finite state transducer (FST) builder,
// keys must be provided in sorted (lexicographical) order.
let mut builder = FileBuilder::create_files(INDEX_PATH, VALUES_PATH)?;
builder.insert(b"abc", b"def")?;
builder.insert(b"foo", b"bar")?;
builder.finish()?;

// Map the files into memory.
let cache = unsafe { MmapCache::map_paths(INDEX_PATH, VALUES_PATH) }?;
let value = unsafe { cache.get_transmuted_value(b"foo") };
assert_eq!(value, Some(b"bar"));