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feat: Add PrefixEvaluator new algorithm with Junit tests (#5755)

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Hardik Pawar
2024-10-13 16:27:05 +05:30
committed by GitHub
parent b0c8a8f0ce
commit bae7f89156
3 changed files with 105 additions and 0 deletions
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src/test/java/com/thealgorithms/stacks/PrefixEvaluatorTest.java Normal file
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package com.thealgorithms.stacks;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.util.EmptyStackException;
import org.junit.jupiter.api.Test;
public class PrefixEvaluatorTest {
@Test
public void testValidExpressions() {
assertEquals(10, PrefixEvaluator.evaluatePrefix("+ * 2 3 4"));
assertEquals(5, PrefixEvaluator.evaluatePrefix("- + 7 3 5"));
assertEquals(6, PrefixEvaluator.evaluatePrefix("/ * 3 2 1"));
}
@Test
public void testInvalidExpression() {
assertThrows(EmptyStackException.class, () -> PrefixEvaluator.evaluatePrefix("+ 3"));
}
@Test
public void testMoreThanOneStackSizeAfterEvaluation() {
assertThrows(IllegalArgumentException.class, () -> PrefixEvaluator.evaluatePrefix("+ 3 4 5"));
}
}