Pratik Bhadane
53 lines
1.4 KiB
Rust
53 lines
1.4 KiB
Rust
/*!
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Fuzz target for `ferro_ta_core::momentum::rsi`.
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Generates arbitrary f64 slices (via raw bytes) and arbitrary timeperiods,
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verifying that RSI never panics and that all finite output values lie in
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the range [0, 100].
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*/
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#![no_main]
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use libfuzzer_sys::fuzz_target;
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use ferro_ta_core::momentum;
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fuzz_target!(|data: &[u8]| {
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// Need at least 1 byte for timeperiod + 8 bytes for one f64
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if data.len() < 2 {
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return;
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}
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// Extract timeperiod from first byte (1-64)
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let timeperiod = ((data[0] as usize) % 64) + 1;
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// Interpret remaining bytes as f64 values
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let float_bytes = &data[1..];
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let n_floats = float_bytes.len() / 8;
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if n_floats == 0 {
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return;
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}
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let close: Vec<f64> = (0..n_floats)
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.map(|i| {
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let chunk: [u8; 8] = float_bytes[i * 8..(i + 1) * 8].try_into().unwrap();
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f64::from_le_bytes(chunk)
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})
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.collect();
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// Must not panic
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let result = momentum::rsi(&close, timeperiod);
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// Result length must match input
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assert_eq!(result.len(), close.len(), "RSI output length mismatch");
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// All finite output values must be in [0, 100]
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for (i, &v) in result.iter().enumerate() {
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if v.is_finite() {
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assert!(
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v >= 0.0 && v <= 100.0,
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"RSI result[{i}] = {v} is out of [0, 100]"
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);
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}
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}
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});
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