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Handle incorrect inputs in StackPostfixNotation (#4261)

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This commit is contained in:
Piotr Idzik
2023-07-26 08:20:56 +02:00
committed by GitHub
parent dec3b98e4b
commit 44dcebb699
2 changed files with 43 additions and 10 deletions
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src/test/java/com/thealgorithms/others/StackPostfixNotationTest.java Normal file
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package com.thealgorithms.others;
import static java.util.Map.entry;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.util.Map;
import org.junit.jupiter.api.Test;
public class StackPostfixNotationTest {
@Test
public void testEvaluate() {
final Map<String, Integer> testCases = Map.ofEntries(entry("1 1 +", 2), entry("2 3 *", 6), entry("6 2 /", 3), entry("-5 -2 -", -3), entry("5 2 + 3 *", 21), entry("-5", -5));
for (final var tc : testCases.entrySet()) {
assertEquals(tc.getValue(), StackPostfixNotation.postfixEvaluate(tc.getKey()));
}
}
@Test
public void testIfEvaluateThrowsExceptionForEmptyInput() {
assertThrows(IllegalArgumentException.class, () -> StackPostfixNotation.postfixEvaluate(""));
}
@Test
public void testIfEvaluateThrowsExceptionForInproperInput() {
assertThrows(IllegalArgumentException.class, () -> StackPostfixNotation.postfixEvaluate("3 3 3"));
}
@Test
public void testIfEvaluateThrowsExceptionForInputWithUnknownOperation() {
assertThrows(IllegalArgumentException.class, () -> StackPostfixNotation.postfixEvaluate("3 3 !"));
}
}