How to use the fonteditor-core/common/lang.equals function in fonteditor-core

it('test basic type', function () {
        let result = lang.equals(
            null,
            undefined
        );
        assert.equal(result, true);

        result = lang.equals(
            1,
            2
        );
        assert.equal(result, false);

        result = lang.equals(
            1,
            '1'
        );
        assert.equal(result, false);

it('test deep equals', function () {
        let result = lang.equals(
            {
                level1: {
                    x: 1
                }
            },
            {
                level1: {
                    y: 1
                }
            }
        );
        assert.equal(result, false);

        result = lang.equals(
            {
                level1: {
                    x: 1
                }
            },
            {
                level1: {
                    x: 1
                }
            }
        );
        assert.equal(result, true);
    });
});

it('test basic type', function () {
        let result = lang.equals(
            null,
            undefined
        );
        assert.equal(result, true);

        result = lang.equals(
            1,
            2
        );
        assert.equal(result, false);

        result = lang.equals(
            1,
            '1'
        );
        assert.equal(result, false);

    });

it('test normal object', function () {
        let result = lang.equals(
            {
                x: 1
            },
            {
                x: 2
            }
        );
        assert.equal(result, false);


        result = lang.equals(
            {
                x: null
            },
            {
                x: undefined

it('test basic type', function () {
        let result = lang.equals(
            null,
            undefined
        );
        assert.equal(result, true);

        result = lang.equals(
            1,
            2
        );
        assert.equal(result, false);

        result = lang.equals(
            1,
            '1'
        );
        assert.equal(result, false);

    });