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7590d8234f
* refactor: add JavaDocs and improve readability in InfixToPrefix * formatting: remove redundant newline --------- Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>
45 lines
1.7 KiB
Java
45 lines
1.7 KiB
Java
package com.thealgorithms.stacks;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import java.util.stream.Stream;
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import org.junit.jupiter.api.Test;
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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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public class InfixToPrefixTest {
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@ParameterizedTest
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@MethodSource("provideValidExpressions")
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void testValidExpressions(String infix, String expectedPrefix) {
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assertEquals(expectedPrefix, InfixToPrefix.infix2Prefix(infix));
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}
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@Test
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void testEmptyString() {
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// Assuming that an empty string returns an empty prefix or throws an exception
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assertEquals("", InfixToPrefix.infix2Prefix(""));
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}
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@Test
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void testNullValue() {
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// Assuming that a null input throws a NullPointerException
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assertThrows(NullPointerException.class, () -> InfixToPrefix.infix2Prefix(null));
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}
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private static Stream<Arguments> provideValidExpressions() {
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return Stream.of(Arguments.of("3+2", "+32"), // Simple addition
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Arguments.of("1+(2+3)", "+1+23"), // Parentheses
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Arguments.of("(3+4)*5-6", "-*+3456"), // Nested operations
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Arguments.of("a+b*c", "+a*bc"), // Multiplication precedence
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Arguments.of("a+b*c/d", "+a/*bcd"), // Division precedence
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Arguments.of("a+b*c-d", "-+a*bcd"), // Subtraction precedence
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Arguments.of("a+b*c/d-e", "-+a/*bcde"), // Mixed precedence
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Arguments.of("a+b*(c-d)", "+a*b-cd"), // Parentheses precedence
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Arguments.of("a+b*(c-d)/e", "+a/*b-cde") // Mixed precedence with parentheses
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);
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}
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}
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