import { assertEquals } from "@std/assert";
import { addWatermark } from "./main.ts";

Deno.test("addWatermark - should add watermark to image", async () => {
  const { default: sharp } = await import("sharp");
  
  // 创建测试图片 (200x200 红色方块)
  const testImagePath = "/tmp/test_image.png";
  await sharp({
    create: {
      width: 200,
      height: 200,
      channels: 3,
      background: { r: 255, g: 0, b: 0 },
    },
  }).png().toFile(testImagePath);
  
  const outputPath = "/tmp/test_image_watermarked.png";
  
  try {
    // 添加水印（带背景色）
    await addWatermark(testImagePath, {
      text: "Test Watermark",
      fontSize: 16,
      color: "white",
      backgroundColor: "#80000000",
      backgroundPadding: 5,
      marginRight: 10,
      marginBottom: 10,
      outputPath,
    });
    
    // 验证输出文件存在
    const stat = await Deno.stat(outputPath);
    assertEquals(stat.isFile, true);
  } finally {
    // 清理
    try {
      await Deno.remove(testImagePath);
    } catch {
      // Ignore
    }
    try {
      await Deno.remove(outputPath);
    } catch {
      // Ignore
    }
  }
});