zulip/frontend_tests/node_tests/fold_dict.js

"use strict";

const FoldDict = zrequire("fold_dict").FoldDict;

run_test("basic", () => {
    const d = new FoldDict();

    assert.equal(d.size, 0);

    assert.deepEqual(Array.from(d.keys()), []);

    d.set("foo", "bar");
    assert.equal(d.get("foo"), "bar");
    assert.notEqual(d.size, 0);

    d.set("foo", "baz");
    assert.equal(d.get("foo"), "baz");
    assert.equal(d.size, 1);

    d.set("bar", "qux");
    assert.equal(d.get("foo"), "baz");
    assert.equal(d.get("bar"), "qux");
    assert.equal(d.size, 2);

    assert.equal(d.has("bar"), true);
    assert.equal(d.has("baz"), false);

    assert.deepEqual(Array.from(d.keys()), ["foo", "bar"]);
    assert.deepEqual(Array.from(d.values()), ["baz", "qux"]);
    assert.deepEqual(Array.from(d), [
        ["foo", "baz"],
        ["bar", "qux"],
    ]);

    d.delete("bar");
    assert.equal(d.has("bar"), false);
    assert.strictEqual(d.get("bar"), undefined);

    assert.deepEqual(Array.from(d.keys()), ["foo"]);

    const val = ["foo"];
    const res = d.set("abc", val);
    assert.strictEqual(res, d);
});

run_test("case insensitivity", () => {
    const d = new FoldDict();

    assert.deepEqual(Array.from(d.keys()), []);

    assert(!d.has("foo"));
    d.set("fOO", "Hello World");
    assert.equal(d.get("foo"), "Hello World");
    assert(d.has("foo"));
    assert(d.has("FOO"));
    assert(!d.has("not_a_key"));

    assert.deepEqual(Array.from(d.keys()), ["fOO"]);

    d.delete("Foo");
    assert.equal(d.has("foo"), false);

    assert.deepEqual(Array.from(d.keys()), []);
});

run_test("clear", () => {
    const d = new FoldDict();

    function populate() {
        d.set("fOO", 1);
        assert.equal(d.get("foo"), 1);
        d.set("bAR", 2);
        assert.equal(d.get("bar"), 2);
    }

    populate();
    assert.equal(d.size, 2);

    d.clear();
    assert.equal(d.get("fOO"), undefined);
    assert.equal(d.get("bAR"), undefined);
    assert.equal(d.size, 0);

    // make sure it still works after clearing
    populate();
    assert.equal(d.size, 2);
});

run_test("undefined_keys", () => {
    const d = new FoldDict();

    assert.throws(
        () => d.has(undefined),
        TypeError,
        "Tried to call a FoldDict method with an undefined key.",
    );
});