Add a fuzzer

README.md

@@ -51,6 +51,12 @@ The `from_str` function returns:
 This function will return `Err(ParseDurationError::InvalidInput)` if the input string
 cannot be parsed as a relative time.
 
+## Fuzzer
+
+To run the fuzzer:
+```
+$ cargo fuzz run fuzz_from_str
+```
 
 ## License
 

fuzz/Cargo.lock

@@ -0,0 +1,182 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
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+ "memchr",
+]
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+[[package]]
+name = "fuzz_from_str"
+version = "0.1.0"
+dependencies = [
+ "humantime_to_duration",
+ "libfuzzer-sys",
+ "rand",
+ "regex",
+ "time",
+]
+
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+ "libc",
+ "wasi",
+]
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+ "regex",
+ "time",
+]
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+ "regex-syntax",
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fuzz/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "fuzz_from_str"
+version = "0.1.0"
+edition = "2018"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+rand = "0.8.4"
+libfuzzer-sys = "0.4"
+regex = "1.8.1"
+time = "0.3.20"
+
+[dependencies.humantime_to_duration]
+path = "../"
+
+[[bin]]
+name = "fuzz_from_str"
+path = "fuzz_targets/from_str.rs"
+test = false
+doc = false

fuzz/fuzz_targets/from_str.rs

@@ -0,0 +1,8 @@
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+
+fuzz_target!(|data: &[u8]| {
+    let s = std::str::from_utf8(data).unwrap_or("");
+    let _ = humantime_to_duration::from_str(s);
+});