build: add script for test coverage

Author: icecreammatt

test.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -e
+
+# https://blog.rng0.io/how-to-do-code-coverage-in-rust
+CARGO_INCREMENTAL=0 RUSTFLAGS='-Cinstrument-coverage' LLVM_PROFILE_FILE='cargo-test-%p-%m.profraw' cargo test
+
+rm -rf target/coverage
+mkdir -p target/coverage
+
+grcov . --binary-path ./target/debug/deps/ -s . -t html --branch --ignore-not-existing --ignore '../*' --ignore "/*" -o target/coverage/html
+
+grcov . --binary-path ./target/debug/deps/ -s . -t lcov --branch --ignore-not-existing --ignore '../*' --ignore "/*" -o target/coverage/lcov.info
+
+rm *.profraw