Add basic fuzzing harness (#35)

* Add inital fuzz harness

* Fix fuzz target

* Change input type to one that impls arbitrary

* Add fuzz lockfile

Cargo.toml

@@ -18,6 +18,8 @@ exclude = [
     "Makefile",
     "deny.toml",
     "bindings",
+    "fuzz/*",
+    "test_data/*",
 ]
 
 [dependencies]

fuzz/.gitignore

@@ -0,0 +1,3 @@
+target
+corpus
+artifacts

fuzz/Cargo.toml

@@ -0,0 +1,24 @@
+[package]
+name = "lz-str-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2018"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.lz-str]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = [ "." ]
+
+[[bin]]
+name = "compress-decompress"
+path = "fuzz_targets/compress_decompress.rs"
+test = false
+doc = false

fuzz/fuzz_targets/compress_decompress.rs

@@ -0,0 +1,8 @@
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+
+fuzz_target!(|input: Vec<u16>| {
+     let compressed = lz_str::compress(&input);
+     let decompressed = lz_str::decompress(&compressed).unwrap();
+     assert!(input == decompressed);
+});