test: make find-suites.sh smarter

scripts/find-suites.sh

@@ -12,15 +12,46 @@ set -euo pipefail
 # ensure dir
 cd -P -- "$(dirname -- "$0")/.."
 
+DIR="$1"
+
+complete_path() {
+    local filename="$1"
+    # Check if path prefix is present
+    if [[ "$filename" != */* ]]; then
+        filename="$DIR/test/$filename"
+    fi
+
+    # Check if suffix is present
+    if [[ "$filename" != *.erl ]]; then
+        filename="$filename.erl"
+    fi
+
+    echo "$filename"
+}
 ## EMQX_CT_SUITES or SUITES is useful in ad-hoc runs
 EMQX_CT_SUITES="${EMQX_CT_SUITES:-${SUITES:-}}"
 if [ -n "${EMQX_CT_SUITES:-}" ]; then
-    echo "${EMQX_CT_SUITES}"
+    OUTPUT=""
+    IFS=',' read -ra FILE_ARRAY <<< "$EMQX_CT_SUITES"
+    for file in "${FILE_ARRAY[@]}"; do
+        path=$(complete_path "$file")
+        if [ ! -f "$path" ]; then
+            echo ''
+            echo "ERROR: '$path' is not a file. Ignored!" >&2
+            exit 1
+        fi
+        if [ -z "$OUTPUT" ]; then
+            OUTPUT="$path"
+        else
+            OUTPUT="$OUTPUT,$path"
+        fi
+    done
+    echo "${OUTPUT}"
     exit 0
 fi
 
-TESTDIR="$1/test"
-INTEGRATION_TESTDIR="$1/integration_test"
+TESTDIR="$DIR/test"
+INTEGRATION_TESTDIR="$DIR/integration_test"
 # Get the output of the find command
 IFS=$'\n' read -r -d '' -a FILES < <(find "${TESTDIR}" -name "*_SUITE.erl" 2>/dev/null | sort && printf '\0')
 if [[ -d "${INTEGRATION_TESTDIR}" ]]; then