Tests.java

import java.io.PrintStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.lang.reflect.Modifier;
import java.util.List;
import java.util.function.Consumer;

import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;

import game.model.RandomManager;
import game.model.Reflections;
import game.view.OutputManager;

public class Tests {
  Consumer<String> printer;

  public Tests(PrintStream out) {
    this.printer = out::println;
  }

  public void println(String fmt, Object... args) {
    printer.accept(fmt.formatted(args));
  }

  public void checkTests(List<Class<?>> testClasses) {
    Class<?>[] classesArray = testClasses.toArray(new Class<?>[0]);

    int passed = 0;
    int failed = 0;
    for(int i = 0; i < classesArray.length; ++i) {
      RandomManager.setSeed(0);
      println(
        "%s[INFO]    attempting to run tests for class %s%s", 
        OutputManager.Color.GREEN, 
        classesArray[i].getCanonicalName(), 
        OutputManager.Color.RESET
      );
      Result result = JUnitCore.runClasses(classesArray[i]);

      if (result.wasSuccessful()) {
        println(
          "%s[SUCCESS] %s%s", 
          OutputManager.Color.GREEN, 
          classesArray[i].getCanonicalName(), 
          OutputManager.Color.RESET
        );
        passed += 1;
      } else {
        for(Failure failure : result.getFailures()) {
          String methodName = failure.getTestHeader().substring(0, failure.getTestHeader().indexOf('('));
          println(
            "%s[FAILURE] %s.%s()%s%s", 
            OutputManager.Color.RED,
            classesArray[i].getCanonicalName(),
            methodName,
            failure.getMessage() != null ? (": " + failure.getMessage()) : "", 
            OutputManager.Color.RESET
          );

          failed += 1;
        }
      }

      RandomManager.setSeed(0);
    }

    println(
      "Passed: %s%% (%s), Failed: %s%% (%s)",
      100*passed/(float)(passed + failed), 
      passed,
      100*failed/(float)(passed + failed),
      failed
    );
  }
  
  public static void main(String[] args) throws FileNotFoundException {
    PrintStream out = System.out;
    System.setOut(new PrintStream(new File("tests_output.log")));
    System.setErr(new PrintStream(new File("tests_output.log")));

    Tests tests = new Tests(out);

    List<Class<?>> testClasses = Reflections
    .queryAll("tests")
    .filter(c -> Modifier.isPublic(c.getModifiers()))
    .toList();

    tests.checkTests(testClasses);

  }
}