feat(test): add grammar-based differential fuzzing#83
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Add proptest-based differential testing that generates random valid bash scripts and compares BashKit output against real bash. This helps find edge cases that aren't covered by hand-written spec tests. Script generators: - Echo commands (quoting styles, flags, multiple args) - Arithmetic (add, sub, mul, div, mod) - Control flow (if/else, for, while, case) - Pipelines (multi-stage pipes) - Logical operators (&&, ||) - Command substitution - Functions Run with: cargo test --test proptest_differential Or: just fuzz-diff / just fuzz-diff-deep https://claude.ai/code/session_01CFh6WZw1QDSGhTnCUW57qi
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Summary
proptest_differential.rs) that generates random valid bash scripts and compares BashKit output against real bashjust fuzz-diffandjust fuzz-diff-deepcommands for running fuzzing testsScript Generators
The fuzzer generates scripts in these categories:
Test plan
cargo test --test proptest_differentialpasses all 10 testscargo fmt --checkpassescargo clippy --all-targets --features network -- -D warningspasseshttps://claude.ai/code/session_01CFh6WZw1QDSGhTnCUW57qi