Asin

Beschreibung

Der Arkussinus wird durch asin beschrieben. Er erwartet einen Parameter und gibt einen Wert an der Stelle zurück.

Syntax

asin(Gleitkommazahl zahl)

Parameter

• zahl - ein Wert zwischen '-1' und '1'

Return Value

• Gibt den Wert des Arkussinus an der Stelle zurück.

Beispiele

asin('0')    --> returns 0

JUnit Tests

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private double PI = Math.PI;

@Test
public void testAsin1() {
	assertEquals(0, Evaluator.getNumberResult("asin(0)", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testAsin2() {
	assertEquals(-PI / 2, Evaluator.getNumberResult("asin(-1)", exerciseVariableMap, fillInVariableMap), 0.0001);
}

@Test
public void testAsin3() {
	assertEquals(PI / 2, Evaluator.getNumberResult("asin(1)", exerciseVariableMap, fillInVariableMap), 0.0001);
}

@Test
public void testAsin4() {
	assertEquals(0, Evaluator.getNumberResult("asin('0')", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testAsin5() {
	assertEquals(0.775397496610753, Evaluator.getNumberResult("asin(0.7)", exerciseVariableMap, fillInVariableMap),
			0.0);
}

@Test
public void testAsinWithInput1() {
	assertEquals(0, Evaluator.getNumberResult("asin([pos=1])", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testAsinWithInput2() {
	assertEquals(PI / 2, Evaluator.getNumberResult("asin([pos=2])", exerciseVariableMap, fillInVariableMap),
			0.0001);
}

@Test
public void testAsinWithInput3() {
	assertNotEquals(PI / 2, Evaluator.getNumberResult("asin([pos=3])", exerciseVariableMap, fillInVariableMap),
			0.0);
}

@Test
public void testAsinWithVariables1() {
	assertEquals(0, Evaluator.getNumberResult("asin([var=a])", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testAsinWithVariables2() {
	assertEquals(PI / 2, Evaluator.getNumberResult("asin([var=b])", exerciseVariableMap, fillInVariableMap),
			0.0001);
}

@Test
public void testAsinWithVariables3() {
	assertNotEquals(PI / 2, Evaluator.getNumberResult("asin([var=c])", exerciseVariableMap, fillInVariableMap),
			0.0);
}

@Test
public void testAsinWithExpressions1() {
	assertEquals(0, Evaluator.getNumberResult("asin(asin(asin(0)))", exerciseVariableMap, fillInVariableMap),
			0.0);

}

@Test
public void testAsinWithExpressions2() {
	assertEquals(0.202744039431659,
			Evaluator.getNumberResult("asin(asin(0.2))", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test(expected = FunctionInvalidArgumentTypeException.class)
public void testAsinWithONECharacter() {
	Evaluator.getNumberResult("asin(a)", exerciseVariableMap, fillInVariableMap);
	fail();
}

@Test(expected = FunctionInvalidArgumentTypeException.class)
public void testAsinWithEmptyStringArgument() {
	Evaluator.getNumberResult("asin('')", exerciseVariableMap, fillInVariableMap);
	fail();
}

@Test(expected = FunctionInvalidNumberOfArgumentsException.class)
public void testAsinWithEmptyArgument() {
	Evaluator.getNumberResult("asin()", exerciseVariableMap, fillInVariableMap);
	fail();
}

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

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