Matchers.xtend

package matchers

describe "Matchers"{
  
	val personOfAgeFour = new Person("A", 4)
	val personOfAgeFive = new Person("B", 5)
	
	context "Hamcrest"{
		
		fact "Example:"{
			personOfAgeFour should be underAge
			personOfAgeFour should be olderThan(personOfAgeFive)
			
			/* Fails with:
			 	java.lang.AssertionError: 
				Expected personOfAgeFour should be olderThan(personOfAgeFive) but
		     		personOfAgeFour is <A(4)>
		    		 olderThan(personOfAgeFive) is <older than>
		     		personOfAgeFive is <B(5)>
			 */
		}
		
		val underAge = matches("underage")[Person p | p.age < 18]
		
		def olderThan(Person p){
			matches("older than")[Person other | other.age > p.age]
		}
		
		val olderThan = matches("olderThan")[Person p | p.age < 18]
	}
	
	context "Lambda Expression"{
		
		fact "Example"{
			personOfAgeFour should be underAge
			personOfAgeFour should be olderThan(personOfAgeFive)
			
			/*  Fails with:
			 	java.lang.AssertionError: 
				Expected personOfAgeFour should be olderThan(personOfAgeFive) but
     				personOfAgeFour is <A(4)>
     				personOfAgeFive is <B(5)>
			 */
		}
		
		def olderThan(Person p){
			[Person other | other.age > p.age]
		}
		
		def underAge() {
			[Person p | p.age < 18]
		}
		
		def <T> should_be(T obj, Functions$Function1<T, Boolean> func){
			func.apply(obj)
		}
	}
	
    
}