ci: comment test result on PR

.github/workflows/test_llgo.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+set -e
+
+export LLGOROOT=$PWD
+
+testcmd=/tmp/test
+llgo build -o $testcmd ./_test
+cases=$($testcmd)
+total=$(echo "$cases" | wc -l | tr -d ' ')
+failed=0
+failed_cases=""
+
+for idx in $(seq 1 $((total))); do
+  case=$(echo "$cases" | sed -n "${idx}p")
+  case_name=$(echo "$case" | cut -d',' -f2)
+  echo "=== Test case: $case_name"
+  set +e
+  out=$("$testcmd" "$((idx-1))" 2>&1)
+  exit_code=$?
+  set -e
+  if [ "${exit_code:-0}" -ne 0 ]; then
+    echo "failed: $out"
+    failed=$((failed+1))
+    failed_cases="$failed_cases\n* :x: $case_name"
+  else
+    echo "passed"
+  fi
+done
+echo "=== Done"
+echo "$((total-failed))/$total tests passed"
+
+if [ "$failed" -ne 0 ]; then
+  echo ":bangbang: Failed llgo cases:" | tee -a result.md
+  echo -e "$failed_cases" | tee -a result.md
+  exit 1
+else
+  echo ":white_check_mark: All llgo tests passed" | tee -a result.md
+fi