Add test name filtering and Python debug options to the test script (#5435)

FYI:
https://docs.pytest.org/en/stable/example/markers.html#using-k-expr-to-select-tests-based-on-their-name

This change adds an interface with the -k param for pytest, for quick
test selection and the --pdb option, to enable Python debug for failed
tests:

--test-expr EXPRESSION - Filters tests by substrings
--debug-fail - Enables auto debug

---------

Signed-off-by: Sławomir Błauciak <slawomir.blauciak@intel.com>

Author: slawblauciak

scripts/test-triton.sh

@@ -45,6 +45,8 @@ OPTION:
     --skip-list SKIPLIST
     --extra-skip-list-suffixes SEMICOLON-SEPARATED LIST OF SUFFIXES
     --select-from-file SELECTFILE
+    --test-expr EXPRESSION
+    --debug-fail
 "
 
 err() {
@@ -86,6 +88,8 @@ TRITON_TEST_IGNORE_ERRORS=false
 SKIP_PIP=false
 SKIP_PYTORCH=false
 TEST_UNSKIP=false
+TEST_FILTER_EXPRESSION=""
+TEST_DEBUG_FAIL=false
 
 while (( $# != 0 )); do
   case "$1" in
@@ -273,6 +277,14 @@ while (( $# != 0 )); do
       TRITON_TEST_SELECTFILE="$(realpath "$2")"
       shift 2
       ;;
+    --test-expr)
+      TEST_FILTER_EXPRESSION="$2"
+      shift 2
+      ;;
+    --debug-fail)
+      TEST_DEBUG_FAIL=true
+      shift
+      ;;
     --help)
       echo "$HELP"
       exit 0
@@ -342,12 +354,44 @@ run_unit_tests() {
 }
 
 run_pytest_command() {
-  if [[ -n "$TRITON_TEST_SELECTFILE" ]]; then
-    if pytest "$@" --collect-only > /dev/null 2>&1; then
-      pytest "$@"
+  local pytest_args=()
+  local pytest_expr=""
+
+  # Parse args to separate -k expression
+  local args=("$@")
+  for ((i=0; i<${#args[@]}; i++)); do
+    if [[ "${args[i]}" == "-k" ]]; then
+      pytest_expr="${args[i+1]}"
+      i=$((i + 1))
+      continue
+    fi
+    pytest_args+=("${args[i]}")
+  done
+
+  # Combine with TEST_FILTER_EXPRESSION
+  if [[ -n "$TEST_FILTER_EXPRESSION" ]]; then
+    if [[ -n "$pytest_expr" ]]; then
+      pytest_expr="($pytest_expr) and ($TEST_FILTER_EXPRESSION)"
+    else
+      pytest_expr="$TEST_FILTER_EXPRESSION"
+    fi
+  fi
+
+  # Apply -k expression if any
+  if [[ -n "$pytest_expr" ]]; then
+    pytest_args+=("-k" "$pytest_expr")
+  fi
+
+  if [[ "$TEST_DEBUG_FAIL" == true ]]; then
+    pytest_args+=("--pdb")
+  fi
+
+  if [[ -n "$TRITON_TEST_SELECTFILE" ]] || [[ -n "$pytest_expr" ]]; then
+    if pytest "${pytest_args[@]}" --collect-only > /dev/null 2>&1; then
+      pytest "${pytest_args[@]}"
     fi
   else
-    pytest "$@"
+    pytest "${pytest_args[@]}"
   fi
 }