text: "use strict";
  
  const {strict: assert} = require("assert");
  
  const {zrequire} = require("../zjsunit/namespace");
  const {run_test} = require("../zjsunit/test");
  const blueslip = require("../zjsunit/zblueslip");
  const {page_params} = require("../zjsunit/zpage_params");
  
  const muting = zrequire("muting");
  const stream_data = zrequire("stream_data");
  
  const design = {
      stream_id: 100,
      name: "design",
  };
  
  const devel = {
      stream_id: 101,
      name: "devel",
  };
  
  const office = {
      stream_id: 102,
      name: "office",
  };
  
  const social = {
      stream_id: 103,
      name: "social",
  };
  
  const unknown = {
      stream_id: 999,
      name: "whatever",
  };
  
  stream_data.add_sub(design);
  stream_data.add_sub(devel);
  stream_data.add_sub(office);
  stream_data.add_sub(social);
  
  function test(label, f) {
      run_test(label, (override) => {
          muting.set_muted_topics([]);
          f(override);
      });
  }
  
  test("edge_cases", () => {
      // private messages
      assert(!muting.is_topic_muted(undefined, undefined));
  });
  
  test("basics", () => {
      assert(!muting.is_topic_muted(devel.stream_id, "java"));
      muting.add_muted_topic(devel.stream_id, "java");
      assert(muting.is_topic_muted(devel.stream_id, "java"));
  
      // test idempotentcy
      muting.add_muted_topic(devel.stream_id, "java");
      assert(muting.is_topic_muted(devel.stream_id, "java"));
  
      muting.remove_muted_topic(devel.stream_id, "java");
      assert(!muting.is_topic_muted(devel.stream_id, "java"));
  
      // test idempotentcy
      muting.remove_muted_topic(devel.stream_id, "java");
      assert(!muting.is_topic_muted(devel.stream_id, "java"));
  
      // test unknown stream is harmless too
      muting.remove_muted_topic(unknown.stream_id, "java");
      assert(!muting.is_topic_muted(unknown.stream_id, "java"));
  });
  
  test("basics", () => {
      assert.deepEqual(muting.get_muted_topics(), []);
      muting.add_muted_topic(office.stream_id, "gossip", 1577836800);
      muting.add_muted_topic(devel.stream_id, "java", 1577836700);
      const muted_topics = muting.get_muted_topics().sort((a, b) => a.date_muted - b.date_muted);
  
      assert.deepEqual(muted_topics, [
          {
              date_muted: 1577836700000,
              date_muted_str: "Dec\u00A031,\u00A02019",
              stream: devel.name,
              stream_id: devel.stream_id,
              topic: "java",
          },
          {
              date_muted: 1577836800000,
              date_muted_str: "Jan\u00A001,\u00A02020",
              stream: office.name,
              stream_id: office.stream_id,
              topic: "gossip",
          },
      ]);
  });
  
  test("unknown streams", () => {
      blueslip.expect("warn", "Unknown stream in set_muted_topics: BOGUS STREAM");
  
      page_params.muted_topics = [
          ["social", "breakfast", 1577836800],
          ["design", "typography", 1577836800],
          ["BOGUS STREAM", "whatever", 1577836800],
      ];
      muting.initialize();
  
      assert.deepEqual(muting.get_muted_topics().sort(), [
          {
              date_muted: 1577836800000,
              date_muted_str: "Jan\u00A001,\u00A02020",
              stream: social.name,
              stream_id: social.stream_id,
              topic: "breakfast",
          },
          {
              date_muted: 1577836800000,
              date_muted_str: "Jan\u00A001,\u00A02020",
              stream: design.name,
              stream_id: design.stream_id,
              topic: "typography",
          },
      ]);
  });
  
  test("case_insensitivity", () => {
      muting.set_muted_topics([]);
      assert(!muting.is_topic_muted(social.stream_id, "breakfast"));
      muting.set_muted_topics([["SOCial", "breakfast"]]);
      assert(muting.is_topic_muted(social.stream_id, "breakfast"));
      assert(muting.is_topic_muted(social.stream_id, "breakFAST"));
  });
  