feat(test): add fuzz test for range_reader

Cargo.toml

@@ -36,6 +36,8 @@ members = [
 
   "bin/oli",
   "bin/oay",
+
+  "core/fuzz",
 ]
 resolver = "2"
 

core/fuzz/.gitignore

@@ -0,0 +1,5 @@
+target
+corpus
+artifacts
+coverage
+tmp

core/fuzz/Cargo.toml

@@ -0,0 +1,45 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+[package]
+edition = "2021"
+name = "opendal-fuzz"
+publish = false
+version = "0.0.0"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+anyhow = "1.0.71"
+arbitrary = { version = "1.3.0", features = ["derive"] }
+bytes = "1.2"
+dotenvy = "0.15.6"
+libfuzzer-sys = "0.4"
+opendal = { path = ".." }
+sha2 = { version = "0.10.6" }
+tokio = { version = "1", features = ["full"] }
+uuid = { version = "1.3.0", features = ["v4"] }
+
+[profile.release]
+debug = 1
+
+[[bin]]
+doc = false
+name = "fuzz_reader"
+path = "fuzz_reader.rs"
+test = false

core/fuzz/README.md

@@ -0,0 +1,40 @@
+# Fuzz Test for OpenDAL
+
+fuzz test are used to test the robustness of the code. 
+
+## Setup
+
+
+
+To run the fuzz tests, please copy the `.env.example`, which is at project root, to `.env` and change the values on need.
+
+Take `fs` for example, we need to change to enable behavior test on `fs` on `/tmp`.
+
+```dotenv
+OPENDAL_FS_TEST=false
+OPENDAL_FS_ROOT=/path/to/dir
+```
+
+into
+
+```dotenv
+OPENDAL_FS_TEST=on
+OPENDAL_FS_ROOT=/tmp
+```
+
+
+## Run
+
+List all fuzz targets.
+
+```bash
+cargo +nightly fuzz list
+```
+
+Run a fuzz target(such as `reader`).
+
+```bash
+cargo +nightly fuzz run fuzz_reader
+```
+
+For more details, please visit [cargo fuzz](https://rust-fuzz.github.io/book/cargo-fuzz/tutorial.html) or run the command cargo fuzz --help.