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import { etag } from "./middleware.ts";import {  assert,  describe,  equalsResponse,  it,  RepresentationHeader,} from "./_dev_deps.ts";
const opaqueTag = `"6b4f9b34cb268809e4863aea74e2c81b54c847dc"`;
describe("etag", () => {  it("should return response what include etag header", async () => {    const middleware = etag();    const response = await middleware(      new Request("test:"),      () => new Response(""),    );
    const WEAK_TAG = `W/` + opaqueTag;
    assert(      await equalsResponse(        response,        new Response("", {          headers: { [RepresentationHeader.ETag]: WEAK_TAG },        }),        true,      ),    );  });
  it("should change to strong validator", async () => {    const middleware = etag({ strong: true });    const response = await middleware(      new Request("test:"),      () => new Response(""),    );
    assert(      await equalsResponse(        response,        new Response("", {          headers: { [RepresentationHeader.ETag]: opaqueTag },        }),        true,      ),    );  });
  it("should change digest function", async () => {    const middleware = etag({ digest: () => new ArrayBuffer(0) });    const response = await middleware(      new Request("test:"),      () => new Response(""),    );
    assert(      await equalsResponse(        response,        new Response("", {          headers: { [RepresentationHeader.ETag]: `W/""` },        }),        true,      ),    );  });
  it("should change additional headers", async () => {    const middleware = etag({ headers: [] });    const response = await middleware(      new Request("test:"),      () => new Response(""),    );
    const opaqueTag = `"da39a3ee5e6b4b0d3255bfef95601890afd80709"`;
    assert(      await equalsResponse(        response,        new Response("", {          headers: { [RepresentationHeader.ETag]: "W/" + opaqueTag },        }),        true,      ),    );  });});