Run NMEA host regressions in CI

Add an independent Ubuntu job for all three hardware-independent NMEA tests, with fatal address and undefined-behavior sanitizer checks.

Co-authored-by: Limor Fried <ladyada@users.noreply.github.com>

.github/workflows/githubci.yml

@@ -3,6 +3,26 @@ name: Arduino Library CI
 on: [pull_request, push, repository_dispatch]
 
 jobs:
+  nmea-tests:
+    name: NMEA regression tests
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Run host tests with sanitizers
+      shell: bash
+      run: |
+        set -euo pipefail
+        mkdir -p "$RUNNER_TEMP/nmea-tests"
+        for test in nmea_validate nmea_fields nmea_utilities; do
+          echo "Running $test"
+          g++ -std=c++11 -Wall -Wextra -Werror -g \
+            -fsanitize=address,undefined -fno-sanitize-recover=all \
+            -fno-omit-frame-pointer -Isrc src/Adafruit_NMEA.cpp \
+            "extras/tests/$test/$test.cpp" -o "$RUNNER_TEMP/nmea-tests/$test"
+          "$RUNNER_TEMP/nmea-tests/$test"
+        done
+
   build:
     runs-on: ubuntu-latest