chore: seperate large files

internal/format/vtt/formatter_test.go

@@ -0,0 +1,78 @@
+package vtt
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestFormat(t *testing.T) {
+	// Create a temporary test file with valid VTT content
+	// 注意格式必须严格符合 WebVTT 规范，否则 Parse 会失败
+	content := `WEBVTT
+
+1
+00:00:01.000 --> 00:00:04.000
+This is the first line.
+
+2
+00:00:05.000 --> 00:00:08.000 align:center
+This is the second line.
+
+3
+00:00:09.500 --> 00:00:12.800
+This is the third line
+with a line break.
+`
+	tempDir := t.TempDir()
+	testFile := filepath.Join(tempDir, "test.vtt")
+	if err := os.WriteFile(testFile, []byte(content), 0644); err != nil {
+		t.Fatalf("Failed to create test file: %v", err)
+	}
+
+	// Format the file
+	err := Format(testFile)
+	if err != nil {
+		t.Fatalf("Format failed: %v", err)
+	}
+
+	// Read the formatted file
+	formatted, err := os.ReadFile(testFile)
+	if err != nil {
+		t.Fatalf("Failed to read formatted file: %v", err)
+	}
+
+	// 检查基本的内容是否存在
+	formattedStr := string(formatted)
+	
+	// 检查标题行
+	if !strings.Contains(formattedStr, "WEBVTT") {
+		t.Errorf("Expected WEBVTT header in output, not found")
+	}
+	
+	// 检查内容是否保留
+	if !strings.Contains(formattedStr, "This is the first line.") {
+		t.Errorf("Expected 'This is the first line.' in output, not found")
+	}
+	
+	if !strings.Contains(formattedStr, "This is the second line.") {
+		t.Errorf("Expected 'This is the second line.' in output, not found")
+	}
+	
+	if !strings.Contains(formattedStr, "This is the third line") {
+		t.Errorf("Expected 'This is the third line' in output, not found")
+	}
+	
+	if !strings.Contains(formattedStr, "with a line break.") {
+		t.Errorf("Expected 'with a line break.' in output, not found")
+	}
+}
+
+func TestFormat_FileErrors(t *testing.T) {
+	// Test with non-existent file
+	err := Format("/nonexistent/file.vtt")
+	if err == nil {
+		t.Error("Expected error when formatting non-existent file, got nil")
+	}
+}