package com.example;

import org.junit.jupiter.api.Test;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import static org.junit.jupiter.api.Assertions.*;

public class MainTest {

    private String captureOutput() {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        PrintStream original = System.out;
        System.setOut(new PrintStream(out));
        Main.printDeliveryStatus();
        System.setOut(original);
        return out.toString().trim().toLowerCase();
    }

    @Test
    void testOrderAboveMinimum() {
        String output = captureOutput();
        assertTrue(output.contains("order amount greater than 15"),
            "Output should contain label 'Order amount greater than 15'. Got: " + output);
        String[] lines = output.split("\\n");
        for (int i = 0; i < lines.length; i++) {
            if (lines[i].contains("order amount greater than 15")) {
                assertEquals("true", lines[i + 1].trim(),
                    "Order amount 18 should be greater than 15. Got: " + lines[i + 1]);
            }
        }
    }
    @Test
    void testPremiumDeliveryFalse() {
        String output = captureOutput();
        String[] lines = output.split("\\n");
        for (int i = 0; i < lines.length; i++) {
            if (lines[i].contains("customer has premium delivery")) {
                assertEquals("false", lines[i + 1].trim(),
                    "Customer should not have premium delivery. Got: " + lines[i + 1]);
            }
        }
    }

    @Test
    void testOrderQualifiesForDelivery() {
        String output = captureOutput();
        String[] lines = output.split("\\n");
        for (int i = 0; i < lines.length; i++) {
            if (lines[i].contains("order qualifies for delivery")) {
                assertEquals("true", lines[i + 1].trim(),
                    "Order should qualify for delivery. Got: " + lines[i + 1]);
            }
        }
    }

    @Test
    void testAllLabelsPresent() {
        String output = captureOutput();
        assertTrue(output.contains("order amount greater than 15"),
            "Missing label: 'Order amount greater than 15'");
        assertTrue(output.contains("customer has premium delivery"),
            "Missing label: 'Customer has premium delivery'");
        assertTrue(output.contains("order qualifies for delivery"),
            "Missing label: 'Order qualifies for delivery'");
    }
}

MainTest.java

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Challenge: Checking Delivery Eligibility

Solution