Equal

Beschreibung

Die Funktionen equal vergleicht zwei Ausdrücke auf Gleichheit miteinander. Wenn die beiden Ausdrücke übereinstimmen gibt die Funktion true zurück, ansonsten false.

Syntax

a == b

Parameter

• a - Zeichenkette oder Gleitkommazahl
• b - Zeichenkette oder Gleitkommazahl

Return Value

• Gibt einen Boolean zurück.

Beispiele

<math>2+3==5</math>    --> returns true

'world of math' == 'world of math'    --> returns true

JUnit Tests

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@BeforeClass
public static void beforeTest() throws FunctionNotImplementedException, UndefinedFillInVariableException,
		UndefinedExerciseVariableException, ParserException, ErroneousFillInVariableException, ErroneousExerciseVariableException {
	equalFillInVariableMap.put(1, ExpressionParser.parse("7", null, null));
	equalFillInVariableMap.put(2, ExpressionParser.parse("2", null, null));

	equalExerciseVariableMap.put("a", ExpressionParser.parse("7", null, null));
	equalExerciseVariableMap.put("b", ExpressionParser.parse("2", null, null));
}

@Test
public void testEqual0() {
	assertTrue(Evaluator.getBooleanResult("1 == 1.0", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqual1() {
	assertTrue(Evaluator.getBooleanResult("1/2 == 0.5", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqual2() {
	assertTrue(Evaluator.getBooleanResult("0.7 == 7/10", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqual3() {
	assertTrue(Evaluator.getBooleanResult("4/2 == 2", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqual4() {
	assertTrue(Evaluator.getBooleanResult("'world of math' == 'world of math'", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqual5() {
	assertTrue(Evaluator.getBooleanResult("'' == ''", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqual6() {
	assertTrue(!Evaluator.getBooleanResult("'' == 1", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqual7() {
	assertTrue(!Evaluator.getBooleanResult("1 = ''", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqual8() {
	assertTrue(Evaluator.getBooleanResult("1 = '1'", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithVariables1() {
	assertTrue(Evaluator.getBooleanResult("[var=a] == 7", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithVariables2() {
	assertTrue(Evaluator.getBooleanResult("2 == [var=b]", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithInput1() {
	assertTrue(Evaluator.getBooleanResult("[pos=1] == 7", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithInput2() {
	assertTrue(Evaluator.getBooleanResult("2 == [pos=2]", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithEncapsulation1() {
	assertTrue(!Evaluator.getBooleanResult("1 == (1 == 0)", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithEncapsulation2() {
	assertTrue(!Evaluator.getBooleanResult("1 == (1 == (1 == 0))", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithEncapsulation3() {
	assertTrue(!Evaluator.getBooleanResult("1 == (1 == (1 == (1 == (1 == 0))))", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithEncapsulation4() {
	assertTrue(Evaluator.getBooleanResult("1 == (1 == (1 == (1 == (1 == 1))))", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithEncapsulation5() {
	assertTrue(!Evaluator.getBooleanResult("((((1 == 0) == 1) == 1) == 1) == 1", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test
public void testEqualWithEncapsulation6() {
	assertTrue(Evaluator.getBooleanResult("((((1 == 1) == 1) == 1) == 1) == 1", equalExerciseVariableMap, equalFillInVariableMap));
}

@Test(expected=ParserException.class)
public void testEqualWithWrongInputCharacter() {
	Evaluator.getBooleanResult("1 == ab", equalExerciseVariableMap, equalFillInVariableMap);
	fail();
}

@Test (expected=UndefinedExerciseVariableException.class)
public void testEqualWithMissingExcerciseVariable() {
	Evaluator.getBooleanResult("[var=j] == 2", equalExerciseVariableMap, equalFillInVariableMap);
	fail();
}

@Test (expected=UndefinedFillInVariableException.class)
public void testEqualWithMissingInput() {
	Evaluator.getBooleanResult("[pos=42] == 2", equalExerciseVariableMap, equalFillInVariableMap);
	fail();
}

Hinweise

• Die Funktion equal kann auch mit einfachen mathematischen Operationen umgehen, wie z.B. 2+3.