text: /* global source, describe, it, each, expect */
  
  const factory = source('main');
  const ISO15924 = source('ValueObject/ISO15924');
  
  describe('ISO 15924', () => {
  	describe('Linb - Linear B', () => {
  		const linb = factory('Linb');
  
  		it('instances are singletons', (next) => {
  			const singleton = factory('Linb');
  			const upper = factory('LINB');
  			const lower = factory('linb');
  			const code = factory.code('Linb');
  			const numeric = factory.numeric('401');
  			const number = factory.numeric(401);
  			const instance = new ISO15924('Linb', '401');
  
  			expect(singleton).to.shallow.equal(linb);
  			expect(upper).to.shallow.equal(linb);
  			expect(lower).to.shallow.equal(linb);
  			expect(code).to.shallow.equal(linb);
  			expect(numeric).to.shallow.equal(linb);
  			expect(number).to.shallow.equal(linb);
  			expect(instance).not.to.shallow.equal(linb);
  			expect(instance.code).to.equal(linb.code);
  			expect(instance.numeric).to.equal(linb.numeric);
  
  			next();
  		});
  
  		it('has code "Linb"', (next) => {
  			expect(linb.code).to.equal('Linb');
  
  			next();
  		});
  
  		it('has numeric "401"', (next) => {
  			expect(linb.numeric).to.equal('401');
  
  			next();
  		});
  
  		it('implements toString', (next) => {
  			expect(linb.toString).to.be.function();
  			expect(linb.toString()).to.equal('Linb');
  			expect(String(linb)).to.equal('Linb');
  			expect(0 + linb).to.equal('0Linb');
  			expect('code:' + linb).to.equal('code:Linb');
  
  			next();
  		});
  
  		it('implements toJSON', (next) => {
  			expect(linb.toJSON).to.be.function();
  			expect(linb.toJSON()).to.equal('Linb');
  			expect(JSON.stringify(linb)).to.equal('"Linb"');
  
  			next();
  		});
  
  		it('implements valueOf', (next) => {
  			expect(linb.valueOf).to.be.function();
  			expect(linb.valueOf()).to.equal(401);
  			expect(Number(linb)).to.equal(401);
  			expect(+linb).to.equal(401);
  
  			next();
  		});
  
  		it('implements Symbol.toPrimitive', (next) => {
  			expect(linb.valueOf).to.be.function();
  			expect(linb.valueOf()).to.equal(401);
  			expect(Number(linb)).to.equal(401);
  			expect(+linb).to.equal(401);
  
  			expect(0 + linb).to.equal('0Linb');
  			expect(String(linb)).to.equal('Linb');
  
  			next();
  		});
  	});
  });
  