Add insert command

tests/contract/insert_validation_test.go

@@ -0,0 +1,78 @@
+package contract
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/rogeecn/renamer/internal/insert"
+	"github.com/rogeecn/renamer/internal/listing"
+)
+
+func TestInsertRejectsOutOfRangePositions(t *testing.T) {
+	t.Parallel()
+
+	tmp := t.TempDir()
+	writeInsertValidationFile(t, filepath.Join(tmp, "短.txt"))
+
+	scope := &listing.ListingRequest{
+		WorkingDir:         tmp,
+		IncludeDirectories: false,
+		Recursive:          false,
+		IncludeHidden:      false,
+		Format:             listing.FormatTable,
+	}
+	if err := scope.Validate(); err != nil {
+		t.Fatalf("validate scope: %v", err)
+	}
+
+	req := insert.NewRequest(scope)
+	req.SetExecutionMode(true, false)
+	req.SetPositionAndText("50", "X")
+
+	if _, _, err := insert.Preview(context.Background(), req, nil); err == nil {
+		t.Fatalf("expected error for out-of-range position")
+	}
+}
+
+func TestInsertBlocksExistingTargetConflicts(t *testing.T) {
+	t.Parallel()
+
+	tmp := t.TempDir()
+	writeInsertValidationFile(t, filepath.Join(tmp, "report.txt"))
+	writeInsertValidationFile(t, filepath.Join(tmp, "report_ARCHIVE.txt"))
+
+	scope := &listing.ListingRequest{
+		WorkingDir:         tmp,
+		IncludeDirectories: false,
+		Recursive:          false,
+		IncludeHidden:      false,
+		Format:             listing.FormatTable,
+	}
+	if err := scope.Validate(); err != nil {
+		t.Fatalf("validate scope: %v", err)
+	}
+
+	req := insert.NewRequest(scope)
+	req.SetExecutionMode(true, false)
+	req.SetPositionAndText("$", "_ARCHIVE")
+
+	summary, _, err := insert.Preview(context.Background(), req, nil)
+	if err != nil {
+		t.Fatalf("preview error: %v", err)
+	}
+	if !summary.HasConflicts() {
+		t.Fatalf("expected conflicts to be detected")
+	}
+}
+
+func writeInsertValidationFile(t *testing.T, path string) {
+	t.Helper()
+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+		t.Fatalf("mkdir %s: %v", path, err)
+	}
+	if err := os.WriteFile(path, []byte("validation"), 0o644); err != nil {
+		t.Fatalf("write file %s: %v", path, err)
+	}
+}