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import {  assert,  assertEquals,  assertSpyCalls,  describe,  equalsResponse,  it,  RepresentationHeader,  spy,} from "./_dev_deps.ts";import { withEtag } from "./transform.ts";
describe("withEtag", () => {  it("should return with etag header field if the response does not have etag field", async () => {    const digest = spy(() => `""` as const);    const initResponse = new Response("ok");    const response = await withEtag(initResponse, digest);
    assertSpyCalls(digest, 1);    assert(      await equalsResponse(        response,        new Response("ok", { headers: { [RepresentationHeader.ETag]: `""` } }),        true,      ),    );  });
  it("should process custom digest what return strong etag object", async () => {    const digest = spy(() => ({ weak: false, tag: "abc" }));    const initResponse = new Response("ok");    const response = await withEtag(initResponse, digest);
    assertSpyCalls(digest, 1);    assert(      await equalsResponse(        response,        new Response("ok", {          headers: {            [RepresentationHeader.ETag]: `"abc"`,          },        }),        true,      ),    );  });
  it("should process custom digest what return weak etag object", async () => {    const digest = spy(() => ({ weak: true, tag: "abc" }));    const initResponse = new Response("ok");    const response = await withEtag(initResponse, digest);
    assertSpyCalls(digest, 1);    assert(      await equalsResponse(        response,        new Response("ok", {          headers: {            [RepresentationHeader.ETag]: `W/"abc"`,          },        }),        true,      ),    );  });
  it("should return same response if the response status code is not 2xx", async () => {    const initResponse = new Response("", { status: 404 });    const digest = spy(() => `""` as const);
    const response = await withEtag(initResponse, digest);
    assertSpyCalls(digest, 0);    assertEquals(initResponse, response);  });
  it("should return same response if the response body does not exist", async () => {    const initResponse = new Response();    const digest = spy(() => `""` as const);
    const response = await withEtag(initResponse, digest);
    assertSpyCalls(digest, 0);    assertEquals(initResponse, response);  });
  it("should return same response if the response has been read", async () => {    const initResponse = new Response("ok");    const digest = spy(() => `""` as const);
    await initResponse.text();    const response = await withEtag(initResponse, digest);
    assert(initResponse.bodyUsed);    assertSpyCalls(digest, 0);    assertEquals(initResponse, response);  });
  it("should return same response if the response has etag header", async () => {    const initResponse = new Response("ok", {      headers: { [RepresentationHeader.ETag]: "" },    });    const digest = spy(() => `""` as const);
    const response = await withEtag(initResponse, digest);
    assertSpyCalls(digest, 0);    assertEquals(initResponse, response);  });});