Add fuzzing for the rust parser

.github/workflows/bindings.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build
       run: cargo build --verbose
     - name: Run tests

.github/workflows/playground.yml

@@ -12,7 +12,7 @@ jobs:
   deploy-playground:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup wasm-pack
         uses: jetli/wasm-pack-action@v0.4.0

.github/workflows/rust.yml

@@ -11,12 +11,41 @@ env:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
+    - name: Setup cache
+      uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cargo/bin/
+          ~/.cargo/registry/index/
+          ~/.cargo/registry/cache/
+          ~/.cargo/git/db/
+          target/
+        key: ${{ runner.os }}-cargo-stable-${{ hashFiles('**/Cargo.lock') }}
     - name: Build
       run: cargo build --verbose
     - name: Run tests
       run: cargo test --verbose
+
+  fuzz:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.os }}-cargo-nightly-${{ hashFiles('**/Cargo.lock') }}
+      - name: Use nightly toolchain
+        run: rustup default nightly
+      - name: Install cargo fuzz
+        run: cargo fuzz --version || cargo install --locked cargo-fuzz
+      - name: Fuzz parser
+        run: cargo fuzz run --release fuzz_parser -- -max_total_time=120 -jobs=2

.gitignore

@@ -1,3 +1,4 @@
 target/
 .DS_Store
 out/
+.idea

Cargo.toml

@@ -52,4 +52,4 @@ name = "convert"
 harness = false
 
 [workspace]
-members = [".", "playground", "bindings"]
+members = [".", "playground", "bindings", "fuzz"]

fuzz/.gitignore

@@ -0,0 +1,4 @@
+target
+corpus
+artifacts
+coverage

fuzz/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "cooklang-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.cooklang]
+path = ".."
+
+[[bin]]
+name = "fuzz_parser"
+path = "fuzz_targets/fuzz_parser.rs"
+test = false
+doc = false
+bench = false

fuzz/fuzz_targets/fuzz_parser.rs

@@ -0,0 +1,10 @@
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+
+use cooklang::{CooklangParser, Extensions, Converter};
+
+fuzz_target!(|contents: &str| {
+    let parser = CooklangParser::new(Extensions::all(), Converter::default());
+    let _ = parser.parse(&contents);
+});