Length

Beschreibung

Die Funktion length gibt die Länge einer gegebenen Zeichenkette zurück. Die Funktion erwartet einen String und gibt eine Ganzzahl zurück.

Syntax

length(Zeichenkette zeichenkette)

Parameter

• zeichenkette - Zeichenkette deren Länge bestimmt werden soll

Return Value

• Gibt eine Ganzzahl zurück

Beispiele

Standardfälle

length('Hello World!')   --> returns 12
length('a')   --> returns 1

Benutzung von Variablen

length([pos=1])
length([var=a])

JUnit Tests

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@BeforeClass
public static void beforeTest() {
	
		fillInVariableMap.put(7, OMConverter.toObject("<OMOBJ><OMSTR>Haveaniceday</OMSTR></OMOBJ>"));
		fillInVariableMap.put(8, OMConverter.toObject("<OMOBJ><OMSTR>stillworking</OMSTR></OMOBJ>"));
		
		exerciseVariableMap.put("g", OMConverter.toObject("<OMOBJ><OMSTR>Haveaniceday</OMSTR></OMOBJ>"));
		exerciseVariableMap.put("h", OMConverter.toObject("<OMOBJ><OMSTR>stillworking</OMSTR></OMOBJ>"));
	
}

@Test
public void testLength1() {
	assertEquals(5, Evaluator.getNumberResult("length('abcde')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testLength2() {
	assertEquals(14, Evaluator.getNumberResult("length('another string')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testLength3() {
	assertEquals(0, Evaluator.getNumberResult("length('')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testLength4() {
	assertEquals(2, Evaluator.getNumberResult("length('  ')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testLengthWithInput1() {
	assertEquals(12, Evaluator.getNumberResult("length('[pos=7]')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testLengthWithInput2() {
	assertEquals(12, Evaluator.getNumberResult("length('[pos=8]')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testLengthWithVariables1() {
	assertEquals(12, Evaluator.getNumberResult("length('[var=g]')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testLengthWithVariables2() {
	assertEquals(12, Evaluator.getNumberResult("length('[var=h]')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test(expected=ParserException.class)
public void testLengthWithWrongInputCharacter() {
	Evaluator.getNumberResult("length(ab)", exerciseVariableMap, fillInVariableMap);
	fail();
}

@Test(expected=FunctionInvalidNumberOfArgumentsException.class)
public void testLengthWithTwoArguments() {
	Evaluator.getNumberResult("length('abab', 'abab')", exerciseVariableMap, fillInVariableMap);
	fail();
}

@Test(expected=FunctionInvalidNumberOfArgumentsException.class)
public void testLengthWithThreeArguments() {
	Evaluator.getNumberResult("length('abab', 'ab', 'ab')", exerciseVariableMap, fillInVariableMap);
	fail();
}

@Test(expected=UndefinedExerciseVariableException.class)
public void testLengthWithMissingExerciseVariable() {
	Evaluator.getNumberResult("length('[var=j]')", exerciseVariableMap, fillInVariableMap);
	fail();
}

@Test(expected=UndefinedFillInVariableException.class)
public void testLengthWithMissingInput() {
	Evaluator.getNumberResult("length('[pos=42]')", exerciseVariableMap, fillInVariableMap);
	fail();
}