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test.js

const assert = require('assert');
const N3 = require('n3');
const namespace = require('@rdfjs/namespace');
const ex = namespace("http://example.org/", N3.DataFactory);
const rdf = namespace("http://rdf.org/", N3.DataFactory);

describe('N3 Parser', function() {
    it('should parse nested nested quad', function() {
        let q = (new N3.Parser()).parse("<< << <sss> <ssp> <sso> >> <sp> <so> >> <p> <o> .")[0];

        assert.ok(
            q.equals(
                N3.DataFactory.quad(
                    N3.DataFactory.quad(
                        N3.DataFactory.quad(
                            N3.DataFactory.namedNode("sss"),
                            N3.DataFactory.namedNode("ssp"),
                            N3.DataFactory.namedNode("sso"),
                        ),
                        N3.DataFactory.namedNode("sp"),
                        N3.DataFactory.namedNode("so")
                    ),
                    N3.DataFactory.namedNode("p"),
                    N3.DataFactory.namedNode("o")
                )
            )
        );
    });

    it('N3.Store should be able to store nested quads', function() {
        let q = (new N3.Parser()).parse("<< << <sss> <ssp> <sso> >> <sp> <so> >> <p> <o> .")[0];

        let store = new N3.Store();
        store.addQuad(q);

        let quads = store.getQuads();
        assert.strictEquals(quads.length, 1);
    });

    it('should parse nested quad in list', function() {
        let q = (new N3.Parser()).parse("<a> <b> ( << <s> <p> <o> >> ).");
        assert.ok(q.length >= 3);
        // <a> <b> list
        // list first <<s p o>>
        // list rest nil
    });
})