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/* | ||
* The MIT License (MIT) | ||
* | ||
* Copyright (c) 2017-2020 Yegor Bugayenko | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included | ||
* in all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
* SOFTWARE. | ||
*/ | ||
package org.cactoos.scalar; | ||
|
||
import org.cactoos.Scalar; | ||
import org.cactoos.iterable.IterableOf; | ||
import org.cactoos.iterable.Joined; | ||
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/** | ||
* Logical exclusive or. | ||
* Returns {@link True} when an odd number of elements have value true, | ||
* otherwise return {@link False}. | ||
* | ||
* <p>This class could be also used for matching multiple boolean | ||
* expressions:</p> | ||
* | ||
* {@code | ||
* new Xor( | ||
* new True(), | ||
* new True(), | ||
* new True() | ||
* ).value(); // the result is true | ||
* | ||
* new Xor( | ||
* new True(), | ||
* new False(), | ||
* new True() | ||
* ).value(); // the result is false | ||
* } | ||
* | ||
* <p>This class implements {@link Scalar}, which throws a checked | ||
* {@link Exception}. This may not be convenient in many cases. To make | ||
* it more convenient and get rid of the checked exception you can | ||
* use the {@link Unchecked} decorator. Or you may use | ||
* {@link IoChecked} to wrap it in an IOException.</p> | ||
* | ||
* <p>There is no thread-safety guarantee. | ||
* | ||
* @see Unchecked | ||
* @see IoChecked | ||
* @since 0.49 | ||
*/ | ||
public final class Xor extends ScalarEnvelope<Boolean> { | ||
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/** | ||
* Ctor. | ||
* @param scalar The Scalar. | ||
*/ | ||
@SafeVarargs | ||
public Xor(final Scalar<Boolean>... scalar) { | ||
this(new IterableOf<>(scalar)); | ||
} | ||
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/** | ||
* Ctor. | ||
* @param iterable The iterable. | ||
*/ | ||
public Xor(final Iterable<Scalar<Boolean>> iterable) { | ||
super(new Reduced<>((a, b) -> a ^ b, new Joined<>(new False(), iterable)) | ||
); | ||
} | ||
} |
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/* | ||
* The MIT License (MIT) | ||
* | ||
* Copyright (c) 2017-2020 Yegor Bugayenko | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included | ||
* in all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
* SOFTWARE. | ||
*/ | ||
package org.cactoos.scalar; | ||
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import org.cactoos.Scalar; | ||
import org.cactoos.iterable.IterableOf; | ||
import org.junit.jupiter.api.Test; | ||
import org.llorllale.cactoos.matchers.Assertion; | ||
import org.llorllale.cactoos.matchers.ScalarHasValue; | ||
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/** | ||
* Test case for {@link Xor}. | ||
* @since 0.48 | ||
*/ | ||
@SuppressWarnings({"PMD.AvoidDuplicateLiterals", "PMD.TooManyMethods"}) | ||
final class XorTest { | ||
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@Test | ||
void trueTrue() throws Exception { | ||
new Assertion<>( | ||
"Either one, but not both nor none", | ||
new Xor( | ||
new True(), | ||
new True() | ||
), | ||
new ScalarHasValue<>(false) | ||
).affirm(); | ||
} | ||
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@Test | ||
void falseTrue() throws Exception { | ||
new Assertion<>( | ||
"Either one, but not both nor none", | ||
new Xor( | ||
new False(), | ||
new True() | ||
), | ||
new ScalarHasValue<>(true) | ||
).affirm(); | ||
} | ||
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@Test | ||
void treuFalse() throws Exception { | ||
new Assertion<>( | ||
"Either one, but not both nor none", | ||
new Xor( | ||
new True(), | ||
new False() | ||
), | ||
new ScalarHasValue<>(true) | ||
).affirm(); | ||
} | ||
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@Test | ||
void falseFalse() throws Exception { | ||
new Assertion<>( | ||
"Either one, but not both nor none", | ||
new Xor( | ||
new False(), | ||
new False() | ||
), | ||
new ScalarHasValue<>(false) | ||
).affirm(); | ||
} | ||
|
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@Test | ||
void singleTrue() throws Exception { | ||
new Assertion<>( | ||
"Single True must be True", | ||
new Xor( | ||
new True() | ||
), | ||
new ScalarHasValue<>(true) | ||
).affirm(); | ||
} | ||
|
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@Test | ||
void singleFalse() throws Exception { | ||
new Assertion<>( | ||
"Single False must be False", | ||
new Xor( | ||
new False() | ||
), | ||
new ScalarHasValue<>(false) | ||
).affirm(); | ||
} | ||
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@Test | ||
void emptyIterable() throws Exception { | ||
new Assertion<>( | ||
"Empty iterable must be False", | ||
new Xor(new IterableOf<Scalar<Boolean>>()), | ||
new ScalarHasValue<>(false) | ||
).affirm(); | ||
} | ||
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@Test | ||
void oddNumberOfTrue() throws Exception { | ||
new Assertion<>( | ||
"Odd number of True must be True", | ||
new Xor( | ||
new False(), | ||
new False(), | ||
new True() | ||
), | ||
new ScalarHasValue<>(true) | ||
).affirm(); | ||
} | ||
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@Test | ||
void evenNumberOfTrue() throws Exception { | ||
new Assertion<>( | ||
"Even number of True must be False", | ||
new Xor( | ||
new False(), | ||
new True(), | ||
new True() | ||
), | ||
new ScalarHasValue<>(false) | ||
).affirm(); | ||
} | ||
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@Test | ||
void allFalse() throws Exception { | ||
new Assertion<>( | ||
"All False must be False", | ||
new Xor( | ||
new False(), | ||
new False(), | ||
new False() | ||
), | ||
new ScalarHasValue<>(false) | ||
).affirm(); | ||
} | ||
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@Test | ||
void allTrue() throws Exception { | ||
new Assertion<>( | ||
"Odd number of True must be True", | ||
new Xor( | ||
new True(), | ||
new True(), | ||
new True() | ||
), | ||
new ScalarHasValue<>(true) | ||
).affirm(); | ||
} | ||
} |