package com.example;

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

import java.util.Map;
import java.util.stream.Stream;

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

public class MainTest {

    @TestFactory
    Stream<DynamicTest> testTryConnect() {
        Map<Integer, Boolean> inputToExpected = Map.of(
                1, true,
                2, true,
                3, true,
                4, true,
                5, true,
                6, false,
                10, false
        );

        return inputToExpected.entrySet().stream().map(entry -> {
            int attempt = entry.getKey();
            boolean expected = entry.getValue();
            boolean actual = Main.tryConnect(attempt);

            String testName = actual == expected
                    ? "tryConnect(" + attempt + ") returned " + actual + " as expected."
                    : "tryConnect(" + attempt + ") returned " + actual + ", but expected " + expected + ".";

            return dynamicTest(testName, () -> {
                assertEquals(expected, actual);
            });
        });
    }
}


MainTest.java

A streamlined beginner module focused on the essential Java programming concepts: syntax, variables, data types, control flow, loops, arrays, and strings.

Challenge: Building a Server Retry Mechanism

解答