test: 引入 Vitest 测试骨架并抽出颜色/比例纯函数模块

src/features/ecommerce/ecommerceImageValidation.test.ts

@@ -0,0 +1,90 @@
+import { describe, it, expect } from "vitest";
+import {
+  validateEcommerceImageFiles,
+  summarizeRejectedImages,
+  normalizeEcommerceImageMime,
+  ECOMMERCE_MAX_IMAGE_BYTES,
+} from "./ecommerceImageValidation";
+
+function makeFile(name: string, type: string, size: number): File {
+  return new File([new Uint8Array(size)], name, { type });
+}
+
+describe("validateEcommerceImageFiles", () => {
+  it("accepts supported types under the size limit", () => {
+    const result = validateEcommerceImageFiles([
+      makeFile("a.png", "image/png", 1024),
+      makeFile("b.jpg", "image/jpeg", 1024),
+      makeFile("c.webp", "image/webp", 1024),
+      makeFile("d.gif", "image/gif", 1024),
+    ]);
+    expect(result.accepted).toHaveLength(4);
+    expect(result.rejected).toHaveLength(0);
+  });
+
+  it("rejects unsupported mime types", () => {
+    const result = validateEcommerceImageFiles([makeFile("x.bmp", "image/bmp", 1024)]);
+    expect(result.accepted).toHaveLength(0);
+    expect(result.rejected[0]).toMatchObject({ name: "x.bmp", reason: "不支持的图片格式" });
+  });
+
+  it("rejects files over 10MB", () => {
+    const result = validateEcommerceImageFiles([
+      makeFile("big.png", "image/png", ECOMMERCE_MAX_IMAGE_BYTES + 1),
+    ]);
+    expect(result.accepted).toHaveLength(0);
+    expect(result.rejected[0]).toMatchObject({ name: "big.png", reason: "图片超过 10MB" });
+  });
+
+  it("accepts exactly 10MB (boundary)", () => {
+    const result = validateEcommerceImageFiles([
+      makeFile("edge.png", "image/png", ECOMMERCE_MAX_IMAGE_BYTES),
+    ]);
+    expect(result.accepted).toHaveLength(1);
+  });
+
+  it("partitions a mixed batch", () => {
+    const result = validateEcommerceImageFiles([
+      makeFile("ok.png", "image/png", 100),
+      makeFile("bad.bmp", "image/bmp", 100),
+      makeFile("huge.jpg", "image/jpeg", ECOMMERCE_MAX_IMAGE_BYTES + 1),
+    ]);
+    expect(result.accepted).toHaveLength(1);
+    expect(result.rejected).toHaveLength(2);
+  });
+});
+
+describe("summarizeRejectedImages", () => {
+  it("returns empty string for no rejections", () => {
+    expect(summarizeRejectedImages([])).toBe("");
+  });
+
+  it("summarizes a single rejection", () => {
+    expect(summarizeRejectedImages([{ name: "a.bmp", reason: "不支持的图片格式" }])).toBe(
+      "a.bmp 已跳过：不支持的图片格式",
+    );
+  });
+
+  it("appends count suffix for multiple rejections", () => {
+    const summary = summarizeRejectedImages([
+      { name: "a.bmp", reason: "不支持的图片格式" },
+      { name: "b.bmp", reason: "不支持的图片格式" },
+    ]);
+    expect(summary).toBe("a.bmp 等 2 个文件 已跳过：不支持的图片格式");
+  });
+});
+
+describe("normalizeEcommerceImageMime", () => {
+  it("passes through supported types", () => {
+    expect(normalizeEcommerceImageMime("image/png")).toBe("image/png");
+    expect(normalizeEcommerceImageMime("image/jpeg")).toBe("image/jpeg");
+    expect(normalizeEcommerceImageMime("image/webp")).toBe("image/webp");
+    expect(normalizeEcommerceImageMime("image/gif")).toBe("image/gif");
+  });
+
+  it("falls back to image/png for unsupported or empty types", () => {
+    expect(normalizeEcommerceImageMime("image/bmp")).toBe("image/png");
+    expect(normalizeEcommerceImageMime("")).toBe("image/png");
+    expect(normalizeEcommerceImageMime("application/octet-stream")).toBe("image/png");
+  });
+});