feat: implement remove command with sequential removals

tests/integration/remove_undo_test.go

@@ -0,0 +1,57 @@
+package integration
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"testing"
+
+	renamercmd "github.com/rogeecn/renamer/cmd"
+)
+
+func TestRemoveCommandAutomationUndo(t *testing.T) {
+	tmp := t.TempDir()
+
+	createFile(t, filepath.Join(tmp, "alpha copy.txt"))
+	createFile(t, filepath.Join(tmp, "nested", "beta draft.txt"))
+
+	preview := renamercmd.NewRootCommand()
+	var previewOut bytes.Buffer
+	preview.SetOut(&previewOut)
+	preview.SetErr(&previewOut)
+	preview.SetArgs([]string{"remove", " copy", " draft", "--path", tmp, "--recursive", "--dry-run"})
+	if err := preview.Execute(); err != nil {
+		t.Fatalf("preview failed: %v\noutput: %s", err, previewOut.String())
+	}
+
+	apply := renamercmd.NewRootCommand()
+	var applyOut bytes.Buffer
+	apply.SetOut(&applyOut)
+	apply.SetErr(&applyOut)
+	apply.SetArgs([]string{"remove", " copy", " draft", "--path", tmp, "--recursive", "--yes"})
+	if err := apply.Execute(); err != nil {
+		t.Fatalf("apply failed: %v\noutput: %s", err, applyOut.String())
+	}
+
+	if !fileExists(filepath.Join(tmp, "alpha.txt")) || !fileExists(filepath.Join(tmp, "nested", "beta.txt")) {
+		t.Fatalf("expected files renamed after apply")
+	}
+
+	undo := renamercmd.NewRootCommand()
+	var undoOut bytes.Buffer
+	undo.SetOut(&undoOut)
+	undo.SetErr(&undoOut)
+	undo.SetArgs([]string{"undo", "--path", tmp})
+	if err := undo.Execute(); err != nil {
+		t.Fatalf("undo failed: %v\noutput: %s", err, undoOut.String())
+	}
+
+	if !fileExists(filepath.Join(tmp, "alpha copy.txt")) || !fileExists(filepath.Join(tmp, "nested", "beta draft.txt")) {
+		t.Fatalf("expected originals restored after undo")
+	}
+}
+
+func fileExists(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil
+}