Main.java

package tester;

import com.google.gson.Gson;

import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.stream.Stream;

public class Main {
    public static void main(String[] args) throws FileNotFoundException {
        if (args.length < 2) {
            System.out.println("usage: <tested_app.jar> <testcase.json>");
            System.exit(1);
        }
        
        Gson gson = new Gson();

        TestCase test = gson.fromJson(new FileReader(args[1]), TestCase.class);

        if (System.getProperty("os.name").toLowerCase().contains("win")){
            try {
                ProcessBuilder pb = new ProcessBuilder("cmd.exe", "/c", "@chcp", "65001>nul").inheritIO();
                Process p = pb.start();
                p.waitFor();
                System.setOut(new PrintStream(System.out, true, StandardCharsets.UTF_8));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        Process proc;
        try {
            proc = Runtime.getRuntime().exec(String.format("java -jar %s --testing", args[0]));
        } catch (Exception e) {
            System.out.print("❌ ");
            System.out.printf("Nem sikerület elindítani a folyamatot, kérlek ellenőrizd, hogy tesztelendő program tényleg itt van-e: \"%s\"\n", args[0]);
            System.exit(1);
            return;
        }
        
        var in = proc.getOutputStream();
        var out = proc.getInputStream();

        try {
            in.write(test.input.getBytes(StandardCharsets.UTF_8));
            in.flush();
            in.close();
        } catch (Exception e) {
            System.out.print("❌ ");
            System.out.println("A program nem fogadott annyi inputot, amennyi meg volt adva.");
            System.exit(1);
            return;
        }

        try {
            proc.waitFor();
        } catch (Exception e) {
            System.out.print("❌ ");
            System.out.println("Nem sikerült a programnak helyesen bezáródni.");
            System.exit(1);
            return;
        }
        
        String o = "";
        try {
            byte[] by = out.readAllBytes();
            o = new String(by, StandardCharsets.UTF_8);
        } catch (Exception e){
            System.out.print("❌ ");
            System.out.println("Nem sikerült kiolvasni a program outputját.");
        }

        System.out.println("--------------");
        System.out.println("Kimenet tesztelése");
        System.out.println();

        AtomicBoolean error = new AtomicBoolean(compareStrings(o, test.output));
        if (!error.get()) {
            System.out.print("✔️ ");
            System.out.println("Siker.");
        }

        test.files.forEach((f, e) -> {
            System.out.println();
            System.out.println();
            System.out.println("--------------");
            System.out.printf("File: %s\n", f);
            System.out.println();
            try {
                String got = fileToString(f);
                boolean er = compareStrings(got, e);
                if (er) {
                    error.set(true);
                } else {
                    System.out.print("✔️ ");
                    System.out.println("Siker.");
                }
            } catch (Exception exception) {
                error.set(true);
                System.out.print("❌ ");
                System.out.printf("Nem sikerült megnyitni a \"%s\" fájlt.\n", f);
            }
        });

        System.out.println();
        System.out.println("--------------");


        if (error.get()) {
            System.out.print("\uD83D\uDD25 ");
        } else {
            System.out.print("✅ ");
        }
        
        System.out.print("A program tesztelése siker");
        if (error.get()) {
            System.out.print("telenül");
        } else {
            System.out.print("esen");
        }
        System.out.println(" végződött.");
        
        if (error.get()) {
            System.exit(1);
        }
    }
    
    private static boolean compareStrings(String gotOut, String expected) {
        String[] expectedLines = expected.split("\n");
        String[] gotLines = gotOut.split("\n");

        boolean error = false;
        int i = 0;
        for (; i < expectedLines.length; i++) {
            String exp = expectedLines[i].trim();
            if (gotLines.length <= i) {
                error = true;
                System.out.print("❌ ");
                System.out.println("A program rövidebb kimenetet produkált, mint az elvárt.");
                System.out.printf("sor %d:\n", i);
                System.out.printf("  várt: %s\n", exp);
            } else {
                String got = gotLines[i].trim();
                if (!exp.equals(got)) {
                    error = true;
                    System.out.print("❌ ");
                    System.out.printf("sor %d:\n", i);
                    System.out.printf("  várt: %s\n", exp);
                    System.out.printf("kapott: %s\n", got);
                }
            }
        }

        for (; i < gotLines.length; i++) {
            error = true;
            String got = gotLines[i].trim();
            System.out.print("❌ ");
            System.out.println("A program hosszabb kimenetet produkált, mint az elvárt.");
            System.out.printf("sor %d:\n", i);
            System.out.printf("kapott: %s\n", got);
        }
        return error;
    }
    
    private static String fileToString(String path) throws IOException {
        StringBuilder build = new StringBuilder();
        Stream<String> stream = Files.lines(Paths.get(path), StandardCharsets.UTF_8);
        stream.forEach(s -> build.append(s).append("\n"));
        return build.toString();
    }
}