zulip/frontend_tests/node_tests/reactions.js

"use strict";

const {strict: assert} = require("assert");

const rewiremock = require("rewiremock/node");

const {stub_templates} = require("../zjsunit/handlebars");
const {set_global, zrequire} = require("../zjsunit/namespace");
const {make_stub} = require("../zjsunit/stub");
const {run_test} = require("../zjsunit/test");
const $ = require("../zjsunit/zjquery");

set_global("document", "document-stub");

const alice_user_id = 5;
set_global("page_params", {
    user_id: alice_user_id,
});

const channel = {__esModule: true};
rewiremock("../../static/js/channel").with(channel);
const emoji_picker = set_global("emoji_picker", {
    hide_emoji_popover() {},
});

const message = {
    id: 1001,
    reactions: [
        {emoji_name: "smile", user_id: 5, reaction_type: "unicode_emoji", emoji_code: "1f642"},
        {emoji_name: "smile", user_id: 6, reaction_type: "unicode_emoji", emoji_code: "1f642"},
        {emoji_name: "frown", user_id: 7, reaction_type: "unicode_emoji", emoji_code: "1f641"},

        {emoji_name: "tada", user_id: 7, reaction_type: "unicode_emoji", emoji_code: "1f389"},
        {emoji_name: "tada", user_id: 8, reaction_type: "unicode_emoji", emoji_code: "1f389"},

        {emoji_name: "rocket", user_id: 5, reaction_type: "unicode_emoji", emoji_code: "1f680"},
        {emoji_name: "rocket", user_id: 6, reaction_type: "unicode_emoji", emoji_code: "1f680"},
        {emoji_name: "rocket", user_id: 7, reaction_type: "unicode_emoji", emoji_code: "1f680"},

        {emoji_name: "wave", user_id: 6, reaction_type: "unicode_emoji", emoji_code: "1f44b"},
        {emoji_name: "wave", user_id: 7, reaction_type: "unicode_emoji", emoji_code: "1f44b"},
        {emoji_name: "wave", user_id: 8, reaction_type: "unicode_emoji", emoji_code: "1f44b"},

        {
            emoji_name: "inactive_realm_emoji",
            user_id: 5,
            reaction_type: "realm_emoji",
            emoji_code: "992",
        },

        // add some bogus user_ids
        {emoji_name: "octopus", user_id: 8888, reaction_type: "unicode_emoji", emoji_code: "1f419"},
        {emoji_name: "frown", user_id: 9999, reaction_type: "unicode_emoji", emoji_code: "1f641"},
    ],
};

const message_store = set_global("message_store", {
    get(message_id) {
        assert.equal(message_id, 1001);
        return message;
    },
});

set_global("current_msg_list", {
    selected_message() {
        return {sent_by_me: true};
    },
    selected_row() {
        return $(".selected-row");
    },
    selected_id() {
        return 42;
    },
});

rewiremock.enable();

const emoji_codes = zrequire("emoji_codes", "generated/emoji/emoji_codes.json");
const emoji = zrequire("emoji", "shared/js/emoji");
const people = zrequire("people");
const reactions = zrequire("reactions");

const emoji_params = {
    realm_emoji: {
        991: {
            id: "991",
            name: "realm_emoji",
            source_url: "/url/for/991",
            deactivated: false,
        },
        992: {
            id: "992",
            name: "inactive_realm_emoji",
            source_url: "/url/for/992",
            deactivated: true,
        },
        zulip: {
            id: "zulip",
            name: "zulip",
            source_url: "/url/for/zulip",
            deactivated: false,
        },
    },
    emoji_codes,
};

emoji.initialize(emoji_params);

const alice = {
    email: "alice@example.com",
    user_id: alice_user_id,
    full_name: "Alice",
};
const bob = {
    email: "bob@example.com",
    user_id: 6,
    full_name: "Bob van Roberts",
};
const cali = {
    email: "cali@example.com",
    user_id: 7,
    full_name: "Cali",
};
const alexus = {
    email: "alexus@example.com",
    user_id: 8,
    full_name: "Alexus",
};
people.add_active_user(alice);
people.add_active_user(bob);
people.add_active_user(cali);
people.add_active_user(alexus);

run_test("open_reactions_popover (sent by me)", () => {
    current_msg_list.selected_message = () => ({sent_by_me: true});
    $(".selected-row").set_find_results(".actions_hover", ["action-stub"]);

    let called = false;
    emoji_picker.toggle_emoji_popover = (target, id) => {
        called = true;
        assert.equal(id, 42);
        assert.equal(target, "action-stub");
    };

    assert(reactions.open_reactions_popover());
    assert(called);
});

run_test("open_reactions_popover (not sent by me)", () => {
    current_msg_list.selected_message = () => ({sent_by_me: false});
    $(".selected-row").set_find_results(".reaction_button", ["reaction-stub"]);

    let called = false;
    emoji_picker.toggle_emoji_popover = (target, id) => {
        called = true;
        assert.equal(id, 42);
        assert.equal(target, "reaction-stub");
    };

    assert(reactions.open_reactions_popover());
    assert(called);
});

run_test("basics", () => {
    blueslip.expect("warn", "Unknown user_id 8888 in reaction for message 1001");
    blueslip.expect("warn", "Unknown user_id 9999 in reaction for message 1001");
    const result = reactions.get_message_reactions(message);
    assert(reactions.current_user_has_reacted_to_emoji(message, "unicode_emoji,1f642"));
    assert(!reactions.current_user_has_reacted_to_emoji(message, "bogus"));

    result.sort((a, b) => a.count - b.count);

    const expected_result = [
        {
            emoji_name: "frown",
            reaction_type: "unicode_emoji",
            emoji_code: "1f641",
            local_id: "unicode_emoji,1f641",
            count: 1,
            user_ids: [7],
            label: "translated: Cali reacted with :frown:",
            emoji_alt_code: false,
            class: "message_reaction",
        },
        {
            emoji_name: "inactive_realm_emoji",
            reaction_type: "realm_emoji",
            emoji_code: "992",
            local_id: "realm_emoji,992",
            count: 1,
            user_ids: [5],
            label: "translated: You (click to remove) reacted with :inactive_realm_emoji:",
            emoji_alt_code: false,
            is_realm_emoji: true,
            url: "/url/for/992",
            class: "message_reaction reacted",
        },
        {
            emoji_name: "smile",
            reaction_type: "unicode_emoji",
            emoji_code: "1f642",
            local_id: "unicode_emoji,1f642",
            count: 2,
            user_ids: [5, 6],
            label: "translated: You (click to remove) and Bob van Roberts reacted with :smile:",
            emoji_alt_code: false,
            class: "message_reaction reacted",
        },
        {
            emoji_name: "tada",
            reaction_type: "unicode_emoji",
            emoji_code: "1f389",
            local_id: "unicode_emoji,1f389",
            count: 2,
            user_ids: [7, 8],
            label: "translated: Cali and Alexus reacted with :tada:",
            emoji_alt_code: false,
            class: "message_reaction",
        },
        {
            emoji_name: "rocket",
            reaction_type: "unicode_emoji",
            emoji_code: "1f680",
            local_id: "unicode_emoji,1f680",
            count: 3,
            user_ids: [5, 6, 7],
            label:
                "translated: You (click to remove), Bob van Roberts and Cali reacted with :rocket:",
            emoji_alt_code: false,
            class: "message_reaction reacted",
        },
        {
            emoji_name: "wave",
            reaction_type: "unicode_emoji",
            emoji_code: "1f44b",
            local_id: "unicode_emoji,1f44b",
            count: 3,
            user_ids: [6, 7, 8],
            label: "translated: Bob van Roberts, Cali and Alexus reacted with :wave:",
            emoji_alt_code: false,
            class: "message_reaction",
        },
    ];
    assert.deepEqual(result, expected_result);
});

run_test("unknown realm emojis (add)", () => {
    blueslip.expect("error", "Cannot find/add realm emoji for code 'broken'.");
    reactions.add_clean_reaction({
        reaction_type: "realm_emoji",
        emoji_code: "broken",
        user_ids: [alice.user_id],
    });
});

run_test("unknown realm emojis (insert)", () => {
    blueslip.expect("error", "Cannot find/insert realm emoji for code 'bogus'.");
    reactions.view.insert_new_reaction({
        reaction_type: "realm_emoji",
        emoji_code: "bogus",
        user_id: bob.user_id,
    });
});

run_test("sending", (override) => {
    const message_id = 1001; // see above for setup
    let emoji_name = "smile"; // should be a current reaction

    override(reactions, "add_reaction", () => {});
    override(reactions, "remove_reaction", () => {});

    {
        const stub = make_stub();
        channel.del = stub.f;
        reactions.toggle_emoji_reaction(message_id, emoji_name);
        assert.equal(stub.num_calls, 1);
        const args = stub.get_args("args").args;
        assert.equal(args.url, "/json/messages/1001/reactions");
        assert.deepEqual(args.data, {
            reaction_type: "unicode_emoji",
            emoji_name: "smile",
            emoji_code: "1f642",
        });
        // args.success() does nothing; just make sure it doesn't crash
        args.success();

        // similarly, we only exercise the failure codepath
        // Since this path calls blueslip.warn, we need to handle it.
        blueslip.expect("warn", "XHR Error Message.");
        channel.xhr_error_message = () => "XHR Error Message.";
        args.error();
    }
    emoji_name = "alien"; // not set yet
    {
        const stub = make_stub();
        channel.post = stub.f;
        reactions.toggle_emoji_reaction(message_id, emoji_name);
        assert.equal(stub.num_calls, 1);
        const args = stub.get_args("args").args;
        assert.equal(args.url, "/json/messages/1001/reactions");
        assert.deepEqual(args.data, {
            reaction_type: "unicode_emoji",
            emoji_name: "alien",
            emoji_code: "1f47d",
        });
    }

    emoji_name = "inactive_realm_emoji";
    {
        // Test removing a deactivated realm emoji. An user can interact with a
        // deactivated realm emoji only by clicking on a reaction, hence, only
        // `process_reaction_click()` codepath supports deleting/adding a deactivated
        // realm emoji.
        const stub = make_stub();
        channel.del = stub.f;
        reactions.process_reaction_click(message_id, "realm_emoji,992");
        assert.equal(stub.num_calls, 1);
        const args = stub.get_args("args").args;
        assert.equal(args.url, "/json/messages/1001/reactions");
        assert.deepEqual(args.data, {
            reaction_type: "realm_emoji",
            emoji_name: "inactive_realm_emoji",
            emoji_code: "992",
        });
    }

    emoji_name = "zulip"; // Test adding zulip emoji.
    {
        const stub = make_stub();
        channel.post = stub.f;
        reactions.toggle_emoji_reaction(message_id, emoji_name);
        assert.equal(stub.num_calls, 1);
        const args = stub.get_args("args").args;
        assert.equal(args.url, "/json/messages/1001/reactions");
        assert.deepEqual(args.data, {
            reaction_type: "zulip_extra_emoji",
            emoji_name: "zulip",
            emoji_code: "zulip",
        });
    }

    emoji_name = "unknown-emoji"; // Test sending an emoji unknown to frontend.
    blueslip.expect("warn", "Bad emoji name: " + emoji_name);
    reactions.toggle_emoji_reaction(message_id, emoji_name);
});

run_test("set_reaction_count", () => {
    const count_element = $.create("count-stub");
    const reaction_element = $.create("reaction-stub");

    reaction_element.set_find_results(".message_reaction_count", count_element);

    reactions.set_reaction_count(reaction_element, 5);

    assert.equal(count_element.text(), "5");
});

run_test("find_reaction", (override) => {
    const message_id = 99;
    const local_id = "unicode_emoji,1f44b";
    const reaction_section = $.create("section-stub");

    const reaction_stub = "reaction-stub";
    reaction_section.set_find_results(
        `[data-reaction-id='${CSS.escape(local_id)}']`,
        reaction_stub,
    );

    override(reactions, "get_reaction_section", (arg) => {
        assert.equal(arg, message_id);
        return reaction_section;
    });

    assert.equal(reactions.find_reaction(message_id, local_id), reaction_stub);
});

run_test("get_reaction_section", () => {
    const message_table = $.create(".message_table");
    const message_row = $.create("some-message-row");
    const message_reactions = $.create("our-reactions-section");

    message_table.set_find_results(`[zid='${CSS.escape(555)}']`, message_row);
    message_row.set_find_results(".message_reactions", message_reactions);

    const section = reactions.get_reaction_section(555);

    assert.equal(section, message_reactions);
});

run_test("emoji_reaction_title", () => {
    const message_id = 1001;
    const local_id = "unicode_emoji,1f642";

    assert.equal(
        reactions.get_reaction_title_data(message_id, local_id),
        "translated: You (click to remove) and Bob van Roberts reacted with :smile:",
    );
});

run_test("add_reaction/remove_reaction", (override) => {
    // This function tests reaction events by mocking out calls to
    // the view.

    const message = {
        id: 2001,
        reactions: [],
    };

    override(message_store, "get", () => message);

    let view_calls = [];

    override(reactions.view, "insert_new_reaction", (opts) => {
        view_calls.push({name: "insert_new_reaction", opts});
    });
    override(reactions.view, "update_existing_reaction", (opts) => {
        view_calls.push({name: "update_existing_reaction", opts});
    });
    override(reactions.view, "remove_reaction", (opts) => {
        view_calls.push({name: "remove_reaction", opts});
    });

    function test_view_calls(test_params) {
        view_calls = [];

        test_params.run_code();

        assert.deepEqual(view_calls, test_params.expected_view_calls);
        assert.deepEqual(
            new Set(reactions.get_emojis_used_by_user_for_message_id(message.message_id)),
            new Set(test_params.alice_emojis),
        );
    }

    const alice_8ball_event = {
        message_id: 2001,
        reaction_type: "unicode_emoji",
        emoji_name: "8ball",
        emoji_code: "1f3b1",
        user_id: alice.user_id,
    };

    const bob_8ball_event = {
        message_id: 2001,
        reaction_type: "unicode_emoji",
        emoji_name: "8ball",
        emoji_code: "1f3b1",
        user_id: bob.user_id,
    };

    const cali_airplane_event = {
        message_id: 2001,
        reaction_type: "unicode_emoji",
        emoji_name: "airplane",
        emoji_code: "2708",
        user_id: cali.user_id,
    };

    test_view_calls({
        run_code() {
            reactions.add_reaction(alice_8ball_event);
        },
        expected_view_calls: [
            {
                name: "insert_new_reaction",
                opts: {
                    message_id: 2001,
                    reaction_type: "unicode_emoji",
                    emoji_name: "8ball",
                    emoji_code: "1f3b1",
                    user_id: alice.user_id,
                },
            },
        ],
        alice_emojis: ["8ball"],
    });

    // Add redundant reaction.
    test_view_calls({
        run_code() {
            reactions.add_reaction(alice_8ball_event);
        },
        expected_view_calls: [],
        alice_emojis: ["8ball"],
    });

    test_view_calls({
        run_code() {
            reactions.add_reaction(bob_8ball_event);
        },
        expected_view_calls: [
            {
                name: "update_existing_reaction",
                opts: {
                    message_id: 2001,
                    reaction_type: "unicode_emoji",
                    emoji_name: "8ball",
                    emoji_code: "1f3b1",
                    user_id: bob.user_id,
                    user_list: [alice.user_id, bob.user_id],
                },
            },
        ],
        alice_emojis: ["8ball"],
    });

    test_view_calls({
        run_code() {
            reactions.add_reaction(cali_airplane_event);
        },
        expected_view_calls: [
            {
                name: "insert_new_reaction",
                opts: {
                    message_id: 2001,
                    reaction_type: "unicode_emoji",
                    emoji_name: "airplane",
                    emoji_code: "2708",
                    user_id: cali.user_id,
                },
            },
        ],
        alice_emojis: ["8ball"],
    });

    test_view_calls({
        run_code() {
            reactions.remove_reaction(bob_8ball_event);
        },
        expected_view_calls: [
            {
                name: "remove_reaction",
                opts: {
                    message_id: 2001,
                    reaction_type: "unicode_emoji",
                    emoji_name: "8ball",
                    emoji_code: "1f3b1",
                    user_id: bob.user_id,
                    user_list: [alice.user_id],
                },
            },
        ],
        alice_emojis: ["8ball"],
    });

    test_view_calls({
        run_code() {
            reactions.remove_reaction(alice_8ball_event);
        },
        expected_view_calls: [
            {
                name: "remove_reaction",
                opts: {
                    message_id: 2001,
                    reaction_type: "unicode_emoji",
                    emoji_name: "8ball",
                    emoji_code: "1f3b1",
                    user_id: alice.user_id,
                    user_list: [],
                },
            },
        ],
        alice_emojis: [],
    });

    // Test redundant remove.
    test_view_calls({
        run_code() {
            reactions.remove_reaction(alice_8ball_event);
        },
        expected_view_calls: [],
        alice_emojis: [],
    });
});

run_test("view.insert_new_reaction (me w/unicode emoji)", (override) => {
    const opts = {
        message_id: 501,
        reaction_type: "unicode_emoji",
        emoji_name: "8ball",
        emoji_code: "1f3b1",
        user_id: alice.user_id,
    };

    const message_reactions = $.create("our-reactions");

    override(reactions, "get_reaction_section", (message_id) => {
        assert.equal(message_id, opts.message_id);
        return message_reactions;
    });

    message_reactions.find = (selector) => {
        assert.equal(selector, ".reaction_button");
        return "reaction-button-stub";
    };

    let template_called;
    stub_templates((template_name, data) => {
        template_called = true;
        assert.equal(template_name, "message_reaction");
        assert.deepEqual(data, {
            count: 1,
            emoji_alt_code: false,
            emoji_name: "8ball",
            emoji_code: "1f3b1",
            local_id: "unicode_emoji,1f3b1",
            class: "message_reaction reacted",
            message_id: opts.message_id,
            label: "translated: You (click to remove) reacted with :8ball:",
        });
        return "<new reaction html>";
    });

    let insert_called;
    $("<new reaction html>").insertBefore = (element) => {
        assert.equal(element, "reaction-button-stub");
        insert_called = true;
    };

    reactions.view.insert_new_reaction(opts);
    assert(template_called);
    assert(insert_called);
});

run_test("view.insert_new_reaction (them w/zulip emoji)", (override) => {
    const zulip_emoji = emoji_params.realm_emoji.zulip;
    const opts = {
        message_id: 502,
        reaction_type: "realm_emoji",
        emoji_name: "zulip",
        emoji_code: zulip_emoji.id,
        user_id: bob.user_id,
        source_url: zulip_emoji.source_url,
    };

    const message_reactions = $.create("our-reactions");

    override(reactions, "get_reaction_section", (message_id) => {
        assert.equal(message_id, opts.message_id);
        return message_reactions;
    });

    message_reactions.find = (selector) => {
        assert.equal(selector, ".reaction_button");
        return "reaction-button-stub";
    };

    let template_called;
    stub_templates((template_name, data) => {
        template_called = true;
        assert.equal(template_name, "message_reaction");
        assert.deepEqual(data, {
            count: 1,
            url: "/static/generated/emoji/images/emoji/unicode/zulip.png",
            is_realm_emoji: true,
            emoji_alt_code: false,
            emoji_name: "zulip",
            emoji_code: "zulip",
            local_id: "realm_emoji,zulip",
            class: "message_reaction",
            message_id: opts.message_id,
            label: "translated: Bob van Roberts reacted with :zulip:",
        });
        return "<new reaction html>";
    });

    let insert_called;
    $("<new reaction html>").insertBefore = (element) => {
        assert.equal(element, "reaction-button-stub");
        insert_called = true;
    };

    reactions.view.insert_new_reaction(opts);
    assert(template_called);
    assert(insert_called);
});

run_test("view.update_existing_reaction (me)", (override) => {
    const opts = {
        message_id: 503,
        reaction_type: "unicode_emoji",
        emoji_name: "8ball",
        emoji_code: "1f3b1",
        user_id: alice.user_id,
        user_list: [alice.user_id, bob.user_id],
    };

    const our_reaction = $.create("our-reaction-stub");

    override(reactions, "find_reaction", (message_id, local_id) => {
        assert.equal(message_id, opts.message_id);
        assert.equal(local_id, "unicode_emoji,1f3b1");
        return our_reaction;
    });

    override(reactions, "set_reaction_count", (reaction, count) => {
        assert.equal(reaction, our_reaction);
        assert.equal(count, 2);
    });

    reactions.view.update_existing_reaction(opts);

    assert(our_reaction.hasClass("reacted"));
    assert.equal(
        our_reaction.attr("aria-label"),
        "translated: You (click to remove) and Bob van Roberts reacted with :8ball:",
    );
});

run_test("view.update_existing_reaction (them)", (override) => {
    const opts = {
        message_id: 504,
        reaction_type: "unicode_emoji",
        emoji_name: "8ball",
        emoji_code: "1f3b1",
        user_id: bob.user_id,
        user_list: [alice.user_id, bob.user_id, cali.user_id, alexus.user_id],
    };

    const our_reaction = $.create("our-reaction-stub");

    override(reactions, "find_reaction", (message_id, local_id) => {
        assert.equal(message_id, opts.message_id);
        assert.equal(local_id, "unicode_emoji,1f3b1");
        return our_reaction;
    });

    override(reactions, "set_reaction_count", (reaction, count) => {
        assert.equal(reaction, our_reaction);
        assert.equal(count, 4);
    });

    reactions.view.update_existing_reaction(opts);

    assert(!our_reaction.hasClass("reacted"));
    assert.equal(
        our_reaction.attr("aria-label"),
        "translated: You (click to remove), Bob van Roberts, Cali and Alexus reacted with :8ball:",
    );
});

run_test("view.remove_reaction (me)", (override) => {
    const opts = {
        message_id: 505,
        reaction_type: "unicode_emoji",
        emoji_name: "8ball",
        emoji_code: "1f3b1",
        user_id: alice.user_id,
        user_list: [bob.user_id, cali.user_id],
    };

    const our_reaction = $.create("our-reaction-stub");
    our_reaction.addClass("reacted");

    override(reactions, "find_reaction", (message_id, local_id) => {
        assert.equal(message_id, opts.message_id);
        assert.equal(local_id, "unicode_emoji,1f3b1");
        return our_reaction;
    });

    override(reactions, "set_reaction_count", (reaction, count) => {
        assert.equal(reaction, our_reaction);
        assert.equal(count, 2);
    });

    reactions.view.remove_reaction(opts);

    assert(!our_reaction.hasClass("reacted"));
    assert.equal(
        our_reaction.attr("aria-label"),
        "translated: Bob van Roberts and Cali reacted with :8ball:",
    );
});

run_test("view.remove_reaction (them)", (override) => {
    const opts = {
        message_id: 506,
        reaction_type: "unicode_emoji",
        emoji_name: "8ball",
        emoji_code: "1f3b1",
        user_id: bob.user_id,
        user_list: [alice.user_id],
    };

    const our_reaction = $.create("our-reaction-stub");
    our_reaction.addClass("reacted");

    override(reactions, "find_reaction", (message_id, local_id) => {
        assert.equal(message_id, opts.message_id);
        assert.equal(local_id, "unicode_emoji,1f3b1");
        return our_reaction;
    });

    override(reactions, "set_reaction_count", (reaction, count) => {
        assert.equal(reaction, our_reaction);
        assert.equal(count, 1);
    });

    our_reaction.addClass("reacted");
    reactions.view.remove_reaction(opts);

    assert(our_reaction.hasClass("reacted"));
    assert.equal(
        our_reaction.attr("aria-label"),
        "translated: You (click to remove) reacted with :8ball:",
    );
});

run_test("view.remove_reaction (last person)", (override) => {
    const opts = {
        message_id: 507,
        reaction_type: "unicode_emoji",
        emoji_name: "8ball",
        emoji_code: "1f3b1",
        user_id: bob.user_id,
        user_list: [],
    };

    const our_reaction = $.create("our-reaction-stub");

    override(reactions, "find_reaction", (message_id, local_id) => {
        assert.equal(message_id, opts.message_id);
        assert.equal(local_id, "unicode_emoji,1f3b1");
        return our_reaction;
    });

    let removed;
    our_reaction.remove = () => {
        removed = true;
    };
    reactions.view.remove_reaction(opts);
    assert(removed);
});

run_test("error_handling", (override) => {
    override(message_store, "get", () => {});

    blueslip.expect("error", "reactions: Bad message id: 55");

    const bogus_event = {
        message_id: 55,
        reaction_type: "realm_emoji",
        emoji_name: "realm_emoji",
        emoji_code: "991",
        user_id: 99,
    };
    override(reactions, "current_user_has_reacted_to_emoji", () => true);
    reactions.toggle_emoji_reaction(55, bogus_event.emoji_name);

    reactions.add_reaction(bogus_event);
    reactions.remove_reaction(bogus_event);
});

run_test("remove spurious user", () => {
    // get coverage for removing non-user (it should just
    // silently fail)

    const event = {
        reaction_type: "unicode_emoji",
        emoji_name: "frown",
        emoji_code: "1f641",
        message_id: message.id,
        user_id: alice.user_id,
    };

    reactions.remove_reaction(event);
});

run_test("remove last user", (override) => {
    override(reactions.view, "remove_reaction", () => {});

    function assert_names(names) {
        assert.deepEqual(
            reactions.get_message_reactions(message).map((r) => r.emoji_name),
            names,
        );
    }

    assert_names(["smile", "frown", "tada", "rocket", "wave", "inactive_realm_emoji"]);

    const event = {
        reaction_type: "unicode_emoji",
        emoji_name: "frown",
        emoji_code: "1f641",
        message_id: message.id,
        user_id: cali.user_id,
    };
    reactions.remove_reaction(event);

    assert_names(["smile", "tada", "rocket", "wave", "inactive_realm_emoji"]);
});

run_test("local_reaction_id", () => {
    const reaction_info = {
        reaction_type: "unicode_emoji",
        emoji_code: "1f44d",
    };
    const local_id = reactions.get_local_reaction_id(reaction_info);
    assert.equal(local_id, "unicode_emoji,1f44d");
});

run_test("process_reaction_click", (override) => {
    override(reactions.view, "remove_reaction", () => {});

    const message_id = 1001;
    let expected_reaction_info = {
        reaction_type: "unicode_emoji",
        emoji_code: "1f3b1",
    };
    override(message_store, "get", (message_id) => {
        assert.equal(message_id, 1001);
        return message;
    });

    expected_reaction_info = {
        reaction_type: "unicode_emoji",
        emoji_name: "smile",
        emoji_code: "1f642",
    };
    {
        const stub = make_stub();
        channel.del = stub.f;
        reactions.process_reaction_click(message_id, "unicode_emoji,1f642");
        assert.equal(stub.num_calls, 1);
        const args = stub.get_args("args").args;
        assert.equal(args.url, "/json/messages/1001/reactions");
        assert.deepEqual(args.data, expected_reaction_info);
    }
});

run_test("warnings", () => {
    // Clean the slate
    delete message.clean_reactions;
    blueslip.expect("warn", "Unknown user_id 8888 in reaction for message 1001");
    blueslip.expect("warn", "Unknown user_id 9999 in reaction for message 1001");
    reactions.get_message_reactions(message);
});

run_test("code coverage", (override) => {
    /*
        We just silently fail in a few places in the reaction
        code, since events may come for messages that we don't
        have yet, or reactions may be for deactivated users, etc.

        Here we just cheaply ensure 100% line coverage to make
        it easy to enforce 100% coverage for more significant
        code additions.
    */
    override(message_store, "get", (id) => {
        assert.equal(id, 42);
        return {
            reactions: [],
        };
    });

    reactions.remove_reaction({
        message_id: 42, // TODO: REACTIONS API
    });
});

run_test("duplicates", () => {
    const dup_reaction_message = {
        id: 1001,
        reactions: [
            {emoji_name: "smile", user_id: 5, reaction_type: "unicode_emoji", emoji_code: "1f642"},
            {emoji_name: "smile", user_id: 5, reaction_type: "unicode_emoji", emoji_code: "1f642"},
        ],
    };

    blueslip.expect(
        "error",
        "server sent duplicate reactions for user 5 (key=unicode_emoji,1f642)",
    );
    reactions.set_clean_reactions(dup_reaction_message);
});

run_test("process_reaction_click undefined", (override) => {
    override(message_store, "get", () => undefined);
    blueslip.expect("error", "reactions: Bad message id: 55");
    blueslip.expect("error", "message_id for reaction click is unknown: 55");
    reactions.process_reaction_click(55, "whatever");
});

run_test("process_reaction_click bad local id", (override) => {
    override(message_store, "get", () => message);
    blueslip.expect(
        "error",
        "Data integrity problem for reaction bad-local-id (message some-msg-id)",
    );
    reactions.process_reaction_click("some-msg-id", "bad-local-id");
});
rewiremock.disable();