test: add fuzzing to quick-protobuf

quick-protobuf/fuzz/.gitignore

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

quick-protobuf/fuzz/Cargo.toml

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+[package]
+name = "quick-protobuf-fuzz"
+version = "0.0.0"
+authors = ["Automatically generated"]
+publish = false
+edition = "2018"
+
+[profile.dev]
+debug = 2
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.quick-protobuf]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "foomessage"
+path = "fuzz_targets/foomessage.rs"
+test = false
+doc = false

quick-protobuf/fuzz/fuzz_targets/foomessage.rs

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+#![no_main]
+use libfuzzer_sys::fuzz_target;
+use quick_protobuf::{BytesReader, MessageRead};
+
+fuzz_target!(|data: &[u8]| {
+    let mut r = BytesReader::from_bytes(data);
+    let _ = pb_rs::data_types::FooMessage::from_reader(&mut r, data);
+});
+
+#[path = "../../examples/pb_rs/mod.rs"]
+mod pb_rs;