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Enhance docs, add more tests in TwosComplement (#5862)

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Hardik Pawar
2024-10-26 14:48:17 +05:30
committed by GitHub
parent ef7f2e97e3
commit fb85a4884f
2 changed files with 63 additions and 32 deletions
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38
src/test/java/com/thealgorithms/bitmanipulation/TwosComplementTest.java
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@@ -1,6 +1,7 @@
package com.thealgorithms.bitmanipulation;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import org.junit.jupiter.api.Test;
@@ -12,7 +13,6 @@ public class TwosComplementTest {
@Test
public void testTwosComplementAllZeroes() {
// Test with a binary number consisting entirely of zeroes
assertEquals("10000", TwosComplement.twosComplement("0000"));
assertEquals("1000", TwosComplement.twosComplement("000"));
assertEquals("100", TwosComplement.twosComplement("00"));
@@ -21,7 +21,6 @@ public class TwosComplementTest {
@Test
public void testTwosComplementAllOnes() {
// Test with a binary number consisting entirely of ones
assertEquals("00001", TwosComplement.twosComplement("11111"));
assertEquals("0001", TwosComplement.twosComplement("1111"));
assertEquals("001", TwosComplement.twosComplement("111"));
@@ -30,25 +29,36 @@ public class TwosComplementTest {
@Test
public void testTwosComplementMixedBits() {
// Test with binary numbers with mixed bits
assertEquals("1111", TwosComplement.twosComplement("0001")); // 1's complement: 1110, then add 1: 1111
assertEquals("1001", TwosComplement.twosComplement("0111")); // 1's complement: 1000
assertEquals("11001", TwosComplement.twosComplement("00111")); // 1's complement: 11000, add 1: 11001
assertEquals("011", TwosComplement.twosComplement("101")); // 1's complement: 010, add 1: 011
assertEquals("1111", TwosComplement.twosComplement("0001")); // 1 -> 1111
assertEquals("1001", TwosComplement.twosComplement("0111")); // 0111 -> 1001
assertEquals("11001", TwosComplement.twosComplement("00111")); // 00111 -> 11001
assertEquals("011", TwosComplement.twosComplement("101")); // 101 -> 011
}
@Test
public void testTwosComplementSingleBit() {
// Test with single bit
assertEquals("10", TwosComplement.twosComplement("0"));
assertEquals("1", TwosComplement.twosComplement("1"));
assertEquals("10", TwosComplement.twosComplement("0")); // 0 -> 10
assertEquals("1", TwosComplement.twosComplement("1")); // 1 -> 1
}
@Test
public void testTwosComplementWithLeadingZeroes() {
// Test with leading zeroes in the input
assertEquals("1111", TwosComplement.twosComplement("0001"));
assertEquals("101", TwosComplement.twosComplement("011"));
assertEquals("110", TwosComplement.twosComplement("010"));
assertEquals("1111", TwosComplement.twosComplement("0001")); // 0001 -> 1111
assertEquals("101", TwosComplement.twosComplement("011")); // 011 -> 101
assertEquals("110", TwosComplement.twosComplement("010")); // 010 -> 110
}
@Test
public void testInvalidBinaryInput() {
// Test for invalid input that contains non-binary characters.
assertThrows(IllegalArgumentException.class, () -> TwosComplement.twosComplement("102"));
assertThrows(IllegalArgumentException.class, () -> TwosComplement.twosComplement("abc"));
assertThrows(IllegalArgumentException.class, () -> TwosComplement.twosComplement("10a01"));
}
@Test
public void testEmptyInput() {
// Edge case: Empty input should result in an IllegalArgumentException.
assertThrows(IllegalArgumentException.class, () -> TwosComplement.twosComplement(""));
}
}