Function length

test/34.database.table.js:74–74

	});
	it('should throw an exception if generator.length is invalid', function () {
		const length = x => Object.defineProperty(function*(){}, 'length', { value: x });
		expect(() => this.db.table('a', { columns: ['x'], rows: length(undefined) })).to.throw(TypeError);
		expect(() => this.db.table('b', { columns: ['x'], rows: length(null) })).to.throw(TypeError);
		expect(() => this.db.table('c', { columns: ['x'], rows: length('1') })).to.throw(TypeError);