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52 lines
2.1 KiB
Java
52 lines
2.1 KiB
Java
package com.thealgorithms.bitmanipulation;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import java.util.stream.Stream;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.Arguments;
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import org.junit.jupiter.params.provider.MethodSource;
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/**
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* Test case for IsPowerTwo class
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* @author Bama Charan Chhandogi (https://github.com/BamaCharanChhandogi)
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*/
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public class IsPowerTwoTest {
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@ParameterizedTest
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@MethodSource("provideNumbersForPowerTwo")
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public void testIsPowerTwo(int number, boolean expected) {
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if (expected) {
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assertTrue(IsPowerTwo.isPowerTwo(number));
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} else {
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assertFalse(IsPowerTwo.isPowerTwo(number));
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}
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}
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private static Stream<Arguments> provideNumbersForPowerTwo() {
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return Stream.of(Arguments.of(1, Boolean.TRUE), // 2^0
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Arguments.of(2, Boolean.TRUE), // 2^1
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Arguments.of(4, Boolean.TRUE), // 2^2
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Arguments.of(8, Boolean.TRUE), // 2^3
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Arguments.of(16, Boolean.TRUE), // 2^4
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Arguments.of(32, Boolean.TRUE), // 2^5
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Arguments.of(64, Boolean.TRUE), // 2^6
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Arguments.of(128, Boolean.TRUE), // 2^7
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Arguments.of(256, Boolean.TRUE), // 2^8
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Arguments.of(1024, Boolean.TRUE), // 2^10
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Arguments.of(0, Boolean.FALSE), // 0 is not a power of two
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Arguments.of(-1, Boolean.FALSE), // Negative number
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Arguments.of(-2, Boolean.FALSE), // Negative number
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Arguments.of(-4, Boolean.FALSE), // Negative number
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Arguments.of(3, Boolean.FALSE), // 3 is not a power of two
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Arguments.of(5, Boolean.FALSE), // 5 is not a power of two
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Arguments.of(6, Boolean.FALSE), // 6 is not a power of two
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Arguments.of(15, Boolean.FALSE), // 15 is not a power of two
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Arguments.of(1000, Boolean.FALSE), // 1000 is not a power of two
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Arguments.of(1023, Boolean.FALSE) // 1023 is not a power of two
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);
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}
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}
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