added CI test

.github/workflows/dev-long-tests.yml

@@ -28,7 +28,10 @@ jobs:
     steps:
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # tag=v4.2.2
     - name: make test
-      run: make test
+      run: |
+        make test
+        make -j zstd
+        ./tests/test_process_substitution.bash ./zstd
 
   # lasts ~26mn
   make-test-macos:

tests/test_process_substitution.bash

@@ -0,0 +1,92 @@
+#!/usr/bin/env bash
+# test_process_substitution.bash
+# Test zstd's support for process substitution with --filelist
+
+# Process arguments
+ZSTD_PATH="zstd"  # Default to using zstd from PATH
+if [ $# -ge 1 ]; then
+    ZSTD_PATH="$1"
+fi
+
+echo "Using zstd executable: $ZSTD_PATH"
+
+set -e  # Exit on error
+
+# Set up test directory and files
+echo "Setting up test environment..."
+TEST_DIR="tmp_process_substit"
+rm -rf "$TEST_DIR"
+mkdir -p "$TEST_DIR"
+echo "Content of file 1" > "$TEST_DIR/file1.txt"
+echo "Content of file 2" > "$TEST_DIR/file2.txt"
+echo "Content of file 3" > "$TEST_DIR/file3.txt"
+
+# Clean up any previous test artifacts
+rm -f "$TEST_DIR/output.zst" "$TEST_DIR/output_echo.zst" "$TEST_DIR/output_cat.zst"
+rm -rf "$TEST_DIR/extracted"
+mkdir -p "$TEST_DIR/extracted"
+
+echo "=== Testing process substitution with --filelist ==="
+
+# Test 1: Basic process substitution with find
+echo "Test 1: Basic process substitution (find command)"
+"$ZSTD_PATH" --filelist=<(find "$TEST_DIR" -name "*.txt" | sort) -c > "$TEST_DIR/output.zst"
+
+if [ -f "$TEST_DIR/output.zst" ]; then
+    echo "✓ Test 1 PASSED: Output file was created"
+else
+    echo "✗ Test 1 FAILED: Output file was not created"
+    exit 1
+fi
+
+# Test 2: Process substitution with echo
+echo "Test 2: Process substitution (echo command)"
+"$ZSTD_PATH" --filelist=<(echo -e "$TEST_DIR/file1.txt\n$TEST_DIR/file2.txt") -c > "$TEST_DIR/output_echo.zst"
+
+if [ -f "$TEST_DIR/output_echo.zst" ]; then
+    echo "✓ Test 2 PASSED: Output file was created"
+else
+    echo "✗ Test 2 FAILED: Output file was not created"
+    exit 1
+fi
+
+# Test 3: Process substitution with cat
+echo "Test 3: Process substitution (cat command)"
+echo -e "$TEST_DIR/file1.txt\n$TEST_DIR/file3.txt" > "$TEST_DIR/filelist.txt"
+"$ZSTD_PATH" --filelist=<(cat "$TEST_DIR/filelist.txt") -c > "$TEST_DIR/output_cat.zst"
+
+if [ -f "$TEST_DIR/output_cat.zst" ]; then
+    echo "✓ Test 3 PASSED: Output file was created"
+else
+    echo "✗ Test 3 FAILED: Output file was not created"
+    exit 1
+fi
+
+# Test 4: Verify contents of archives
+echo "Test 4: Verifying archive contents"
+"$ZSTD_PATH" -d "$TEST_DIR/output.zst" -o "$TEST_DIR/extracted/combined.out"
+
+if grep -q "Content of file 1" "$TEST_DIR/extracted/combined.out" &&
+   grep -q "Content of file 2" "$TEST_DIR/extracted/combined.out" &&
+   grep -q "Content of file 3" "$TEST_DIR/extracted/combined.out"; then
+    echo "✓ Test 4 PASSED: All files were correctly archived and extracted"
+else
+    echo "✗ Test 4 FAILED: Not all expected content was found in the extracted file"
+    exit 1
+fi
+
+# Test 5: Edge case with empty list
+echo "Test 5: Process substitution with empty input"
+"$ZSTD_PATH" --filelist=<(echo "") -c > "$TEST_DIR/output_empty.zst" 2>/dev/null || true
+
+if [ -f "$TEST_DIR/output_empty.zst" ]; then
+    echo "✓ Test 5 PASSED: Handled empty input gracefully"
+else
+    echo "✓ Test 5 PASSED: Properly rejected empty input"
+fi
+
+# cleanup
+rm -rf "$TEST_DIR"
+
+echo "All tests completed successfully!"
+