How to use the proclaim.deepEqual function in proclaim

it(desc, function () {
                    var i, len = pairs.length, pair;
                    for (i = 0; i < len; i ++) {
                        pair = pairs[i];
                        if (isNaN(pair)) {
                            assert.isTrue(isNaN(upcast.to(pair, 'function')));
                        } else {
                            assert.deepEqual(upcast.to(pair, 'function')(), pair);
                        }
                    }
                });
            }

it('should call the `_run` method with `options.url`, the options (minus URL), and the callback', function () {
				assert.calledOnce(instance._run);
				assert.strictEqual(instance._run.firstCall.args[0], options.url);
				assert.deepEqual(instance._run.firstCall.args[1], options);
				assert.strictEqual(instance._run.firstCall.args[2], done);
			});
		});

it('defaults the options object with `pa11y.defaults`', () => {
			assert.calledOnce(extend);
			assert.isObject(extend.firstCall.args[0]);
			assert.strictEqual(extend.firstCall.args[1], pa11y.defaults);
			assert.deepEqual(extend.firstCall.args[2], options);
		});

runHtmlCodeSniffer(page, opts, function (err, results) {
			assert.deepEqual(results, messages);
			done();
		});
	});

loadConfig('./config/pa11y.json', function (err, config) {
			assert.isTrue(fs.readFile.withArgs(path.resolve(process.cwd(), './config/pa11y.json'), 'utf8').calledOnce);
			assert.isTrue(JSON.parse.withArgs(exampleConfig).calledOnce);
			assert.deepEqual(config, exampleConfigObject);
			done();
		});
	});