package com.example;

import org.junit.jupiter.api.DynamicTest;
import org.junit.jupiter.api.TestFactory;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;

import static org.junit.jupiter.api.Assertions.*;
import static org.junit.jupiter.api.DynamicTest.dynamicTest;

public class MainTest {

    @TestFactory
    Stream<DynamicTest> testExtractFailureLogs() {
        List<TestCase> testCases = List.of(
                new TestCase(
                        new String[]{
                                "System started successfully",
                                "Failure: Disk space is low",
                                "User logged in",
                                "Warning: High CPU usage",
                                "Failure: Unable to connect to server",
                                "Backup completed"
                        },
                        new String[]{
                                "Failure: Disk space is low",
                                "Failure: Unable to connect to server"
                        }
                ),
                new TestCase(
                        new String[]{
                                "Everything is fine",
                                "No issues detected"
                        },
                        new String[]{}
                ),
                new TestCase(
                        new String[]{
                                "FAILURE detected",
                                "fatal: failure to start",
                                "failure"
                        },
                        new String[]{
                                "FAILURE detected",
                                "fatal: failure to start",
                                "failure"
                        }
                )
        );

        return testCases.stream().map(testCase -> {
            String inputStr = testCase.input == null ? "null" : Arrays.toString(testCase.input);

            try {
                String[] result = Main.extractFailureLogs(testCase.input);
                boolean equal = Arrays.equals(result, testCase.expected);

                String resultStr = Arrays.toString(result);
                String expectedStr = testCase.expected == null ? "null" : Arrays.toString(testCase.expected);

                String name = equal
                        ? "Input: " + inputStr + " -> " + resultStr + " as expected."
                        : "Input: " + inputStr + " -> " + resultStr + ", expected: " + expectedStr;

                return dynamicTest(name, () ->
                        assertArrayEquals(testCase.expected, result,
                                "Expected: " + expectedStr + ", but got: " + resultStr)
                );
            } catch (Exception e) {
                String name = "Runtime error: " + e.getClass().getSimpleName() +
                        " - " + e.getMessage() + " | Input: " + inputStr;
                return dynamicTest(name, () -> fail("Unexpected exception: " + e));
            }
        });
    }

    record TestCase(String[] input, String[] expected) {}
}

MainTest.java

Um módulo introdutório simplificado focado nos conceitos essenciais de programação em Java: sintaxe, variáveis, tipos de dados, controle de fluxo, laços, arrays e strings.

Desafio: Filtrar Mensagens de Falha

Solução