Tests für Boolsche Ausdrücke, IfElse, While, Funktionen mit/ohne Parameter, rekursive Funktionen

ParserTests.java

	@Test
	public void testBooleanValues() {
		testResult("true", true);
		testResult("false", false);
		
		testResult("x=true y=false x", true);
		testResult("x=true y=false y", false);
	}
	
	@Test
	public void testFunnyStuff() {
		try {
			testResult("true = 23 false = 42", 65.0); // reservierte Namen
			Assert.fail();
		} catch (IllegalArgumentException e) {
		}
		testResult("x=2 y=5 x||y", new Value()); // null sozusagen
	}
	
	@Test
	public void testSimpleBoolean() {
		testResult("1 > 2", false);
		testResult("2 > 1", true);
		
		testResult("x=5x<5", false);
		testResult("x=5x<6", true);
		testResult("x=5x>4", true);
	}
	
	@Test
	public void testDebugStuff() {		
	    testResult("4 == 5", false);
	}
	
	@Test
	public void testBooleanLogicExpressions() {
		
		testResult("!true", false);
		testResult("!false", true);
		
		testResult("x=true !x", false);
		testResult("x=false !x", true);
		
		testResult("x=true y=true x==y", true);
		testResult("x=true y=false x==y", false);
		
		testResult("x=true y=true x&&y", true);
		testResult("x=true y=false x&&y", false);
		testResult("x=false y=true x&&y", false);
		testResult("x=false y=false x&&y", false);

		testResult("x=true y=true x||y", true);
		testResult("x=true y=false x||y", true);
		testResult("x=false y=true x||y", true);
		testResult("x=false y=false x||y", false);
	}
	
	@Test
	public void testBooleanWithBrackets() {
		testResult("x=false y=true (x)", false);
	}
	
	@Test
	public void testBooleanExpressions() {
		testResult("false||true&&false", false);
		testResult("false||true&&true", true);
		testResult("true||false&&true", true);
	}
	
	@Test
	public void testBooleanAssigment() {
		testResult("x=5 y=x>4", true);
	}
	
	@Test
	public void testIfStatement() {
		testResult("x=5 " +
				"if (true) {" +
				"	x+=10" +
				"} x", 15);
		
		testResult("x=5 " +
				"if (false) {" +
				"	x+=10" +
				"} x", 5);
	}

	@Test
	public void testIfScope() {
		// there is no local scope for if/else statements
		testResult("x=0" + 
				"if (true) {" +
				"	x=10" +
				"} y=1 x", 10);
	}
	
	@Test
	public void testIfElseStatement() {
		testResult("x=5 " +
				"if (false) {" +
				"	x+=10" +
				"} else {" +
				"	x*=5" +
				"} x", 25);
		
		testResult("x=5 " +
				"if (true) {" +
				"	x+=10" +
				"} else {" +
				"	x*=5" +
				"} x", 15);
	}
	
	@Test
	public void testNestedIfElse() {
		testResult("x=1 " +
				"if (true) {" +
				"	if (true) {" +
				"		x+=10" +
				"	} else {" +
				"		x+=20" +
				"	}" +
				"} else {" +
				"	if (true) {" +
				"		x+=100" +
				"	} else {" +
				"		x+=200" +
				"	}" +
				"} x", 11);
		
		testResult("x=1 " +
				"if (true) {" +
				"	if (false) {" +
				"		x+=10" +
				"	} else {" +
				"		x+=20" +
				"	}" +
				"} else {" +
				"	if (true) {" +
				"		x+=100" +
				"	} else {" +
				"		x+=200" +
				"	}" +
				"} x", 21);
		
		testResult("x=1 " +
				"if (false) {" +
				"	if (true) {" +
				"		x+=10" +
				"	} else {" +
				"		x+=20" +
				"	}" +
				"} else {" +
				"	if (true) {" +
				"		x+=100" +
				"	} else {" +
				"		x+=200" +
				"	}" +
				"} x", 101);
		
		testResult("x=1 " +
				"if (false) {" +
				"	if (true) {" +
				"		x+=10" +
				"	} else {" +
				"		x+=20" +
				"	}" +
				"} else {" +
				"	if (false) {" +
				"		x+=100" +
				"	} else {" +
				"		x+=200" +
				"	}" +
				"} x", 201);
	}
	
	@Test
	public void testWhile() {
		testResult("i=0 sum=0" +
				"while (i<10) {" +
				"	i=i+1" +
				"	sum=sum+i " +
				"}", 55);
		
		testResult("x = 1" +
				"while (x<10) { x+=1 }" +
				"x", 10);
	}
	
	@Test
	public void testSimpleFunction() {
		testResult("pi() {3.14159265}" +
				"x = pi() x*=2", 6.2831853);
	}
	
	@Test
	public void testFunctionWithParam() {
		testResult("x=5 y=10" +
				"sum(a b) {" +
				"	tmp = a + b" +
				"}" +
				"sum(x y)", 15);
		
		testResult("x=5 y=10" +
				"sum(a b) {" +
				"	x = 999" +
				"	tmp = a + b" +
				"}" +
				"sum(x y) + x", 20);
	}
	
	@Test
	public void testFunctionWithRecursion() {
		testResult(
				"fakult(a) {" +
				"	if (a>1) {" +
				"		a * fakult(a-1)" +
				"	} else {" +
				"		1" +
				"	}"+
				"}" +
				"fakult(5)", 120);
	}