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Add Highest Set Bit algorithm (#4330)

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This commit is contained in:
Bama Charan Chhandogi
2023-09-06 01:49:23 +05:30
committed by GitHub
parent 72247ed85c
commit fc693e8b51
2 changed files with 69 additions and 0 deletions
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37
src/test/java/com/thealgorithms/bitmanipulation/HighestSetBitTest.java Normal file
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@ -0,0 +1,37 @@
package com.thealgorithms.bitmanipulation;
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
/**
* Test case for Highest Set Bit
* @author Bama Charan Chhandogi (https://github.com/BamaCharanChhandogi)
*/
class HighestSetBitTest {
@Test
void testHighestSetBit() {
assertFalse(HighestSetBit.findHighestSetBit(0).isPresent());
assertEquals(0, HighestSetBit.findHighestSetBit(1).get());
assertEquals(1, HighestSetBit.findHighestSetBit(2).get());
assertEquals(1, HighestSetBit.findHighestSetBit(3).get());
assertEquals(2, HighestSetBit.findHighestSetBit(4).get());
assertEquals(2, HighestSetBit.findHighestSetBit(5).get());
assertEquals(2, HighestSetBit.findHighestSetBit(7).get());
assertEquals(3, HighestSetBit.findHighestSetBit(8).get());
assertEquals(3, HighestSetBit.findHighestSetBit(9).get());
assertEquals(3, HighestSetBit.findHighestSetBit(15).get());
assertEquals(4, HighestSetBit.findHighestSetBit(16).get());
assertEquals(4, HighestSetBit.findHighestSetBit(17).get());
assertEquals(4, HighestSetBit.findHighestSetBit(31).get());
assertEquals(5, HighestSetBit.findHighestSetBit(32).get());
assertEquals(5, HighestSetBit.findHighestSetBit(33).get());
assertEquals(7, HighestSetBit.findHighestSetBit(255).get());
assertEquals(8, HighestSetBit.findHighestSetBit(256).get());
assertEquals(8, HighestSetBit.findHighestSetBit(511).get());
assertEquals(9, HighestSetBit.findHighestSetBit(512).get());
assertThrows(IllegalArgumentException.class, () -> HighestSetBit.findHighestSetBit(-37));
}
}