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import { computeETagByStrategy, reason, stringifyHeaders } from "./utils.ts";import {  assertEquals,  assertSpyCalls,  assertThrows,  describe,  it,  spy,} from "./_dev_deps.ts";
describe("reason", () => {  it("should throw error", () => {    assertThrows(() => reason("test")(Error()));  });});
describe("stringifyHeaders", () => {  it("should return deserialized string", () => {    const table: [Headers, string][] = [      [new Headers(), ""],      [new Headers({ a: "" }), "a: "],      [new Headers({ "a": "a" }), "a: a"],      [new Headers({ "a": "", b: "" }), "a: \nb: "],      [new Headers({ b: "", a: "" }), "a: \nb: "],      [        new Headers({ c: "c", b: "b", a: "a", "x-a": "" }),        "a: a\nb: b\nc: c\nx-a: ",      ],      [        new Headers({ aaa: "", a: "", aa: "" }),        "a: \naa: \naaa: ",      ],    ];
    table.forEach(([headers, expected]) => {      assertEquals(stringifyHeaders(headers), expected);    });  });});
describe("computeETagByStrategy", () => {  it("should pass body only if the header is none", async () => {    const digest = spy((data: ArrayBuffer) => {      assertEquals(        new TextDecoder().decode(data),        "a",      );
      return new ArrayBuffer(0);    });
    const etag = await computeETagByStrategy(new Response("a"), {      digest,      strong: false,      headers: [],    });
    assertSpyCalls(digest, 1);    assertEquals(etag, { weak: true, tag: "" });  });
  it("should pass header and body stream", async () => {    const digest = spy((data: ArrayBuffer) => {      assertEquals(        new TextDecoder().decode(data),        "content-type: text/plain;charset=UTF-8\n\na",      );
      return new ArrayBuffer(0);    });
    const etag = await computeETagByStrategy(new Response("a"), {      digest,      strong: true,      headers: ["content-type"],    });
    assertSpyCalls(digest, 1);    assertEquals(etag, { weak: false, tag: "" });  });
  it("should pass header and body stream by default", async () => {    const etag = await computeETagByStrategy(new Response("abc"));    const etagc = "52d3e27d9e12c76aa045b5d72bab675df54df141";
    assertEquals(etag, { weak: true, tag: etagc });  });});