UnaryMinus

Beschreibung

Die Funktion UnaryMinus (-) setzt eine positive Zahl ins negative und eine negative Zahl ins positive.

Syntax

 -a
 unaryMinus(a)

Parameter

• a - double

Return Value

• Gibt die positive oder negative Zahl zurück

Beispiele

   -8    --> -8
   -(-5)    --> 5

JUnit Tests

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@BeforeClass
public static void beforeTest() {
	fillInVariableMap.put(1, OMConverter.toObject("<OMOBJ><OMI>3</OMI></OMOBJ>"));

	exerciseVariableMap.put("a", OMConverter.toObject("<OMOBJ><OMI>3</OMI></OMOBJ>"));
}

@Test
public void testUnaryMinus1() {
	assertEquals(-8, Evaluator.getNumberResult("-8", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testUnaryMinus2() {
	assertEquals(-2, Evaluator.getNumberResult("-2", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testUnaryMinus3() {
	assertEquals(-2.2, Evaluator.getNumberResult("-2.2", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testUnaryMinusWithInput1() {
	assertEquals(-3, Evaluator.getNumberResult("-[pos=1]", exerciseVariableMap, fillInVariableMap), 0.0);

}

@Test
public void testUnaryMinusWithInput2() {
	assertEquals(-1, Evaluator.getNumberResult("-[pos=2]", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testUnaryMinusWithVariables1() {
	assertEquals(-3, Evaluator.getNumberResult("-[var=a]", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testUnaryMinusWithVariables2() {
	assertEquals(-1, Evaluator.getNumberResult("-[var=b]", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testUnaryMinusWithExpressions1() {
	assertEquals(5, Evaluator.getNumberResult("-(-5)", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test
public void testUnaryMinusWithExpressions2() {
	assertEquals(-4, Evaluator.getNumberResult("-(-(-4))", exerciseVariableMap, fillInVariableMap), 0.0);
}

@Test(expected = FunctionInvalidArgumentTypeException.class)
public void testUnaryMinusWithWrongInputCharacter() {
	assertEquals(-5, Evaluator.getNumberResult("-'aabc'", exerciseVariableMap, fillInVariableMap), 0.0);
}

Hinweise

• erwartet eine Zahl