Add insert command

tests/contract/insert_command_test.go

@@ -0,0 +1,91 @@
+package contract
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/rogeecn/renamer/internal/insert"
+	"github.com/rogeecn/renamer/internal/listing"
+)
+
+func TestInsertPreviewAndApply(t *testing.T) {
+	t.Parallel()
+
+	tmp := t.TempDir()
+	writeInsertFile(t, filepath.Join(tmp, "项目A报告.docx"))
+	writeInsertFile(t, filepath.Join(tmp, "项目B报告.docx"))
+
+	scope := &listing.ListingRequest{
+		WorkingDir:         tmp,
+		IncludeDirectories: false,
+		Recursive:          false,
+		IncludeHidden:      false,
+		Extensions:         nil,
+		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("^", "2025-")
+
+	var buf bytes.Buffer
+	summary, planned, err := insert.Preview(context.Background(), req, &buf)
+	if err != nil {
+		t.Fatalf("Preview error: %v", err)
+	}
+
+	if summary.TotalCandidates != 2 {
+		t.Fatalf("expected 2 candidates, got %d", summary.TotalCandidates)
+	}
+	if summary.TotalChanged != 2 {
+		t.Fatalf("expected 2 changes, got %d", summary.TotalChanged)
+	}
+
+	output := buf.String()
+	if !containsAll(output, "2025-项目A报告.docx", "2025-项目B报告.docx") {
+		t.Fatalf("preview output missing expected names: %s", output)
+	}
+
+	req.SetExecutionMode(false, true)
+	entry, err := insert.Apply(context.Background(), req, planned, summary)
+	if err != nil {
+		t.Fatalf("Apply error: %v", err)
+	}
+
+	if len(entry.Operations) != 2 {
+		t.Fatalf("expected 2 ledger operations, got %d", len(entry.Operations))
+	}
+
+	if _, err := os.Stat(filepath.Join(tmp, "项目A报告.docx")); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("expected original name to be renamed: %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(tmp, "2025-项目A报告.docx")); err != nil {
+		t.Fatalf("expected renamed file: %v", err)
+	}
+}
+
+func writeInsertFile(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("test"), 0o644); err != nil {
+		t.Fatalf("write file %s: %v", path, err)
+	}
+}
+
+func containsAll(haystack string, needles ...string) bool {
+	for _, n := range needles {
+		if !bytes.Contains([]byte(haystack), []byte(n)) {
+			return false
+		}
+	}
+	return true
+}