implemented a part of the test

src/main/java/at/ionas999/questioncatalog/Utils.java

@@ -7,8 +7,13 @@ import javafx.scene.control.Alert;
 import javafx.scene.control.ButtonType;
 import javafx.stage.Stage;
 
+import java.util.Collections;
+import java.util.List;
+
 import javafx.event.ActionEvent;
+
 import java.io.IOException;
+import java.util.Collections;
 import java.util.Optional;
 
 public class Utils {
@@ -20,9 +25,10 @@ public class Utils {
         stage.show();
     }
 
-    public static Stage getStageFromActionEven(ActionEvent actionEvent){
+    public static Stage getStageFromActionEven(ActionEvent actionEvent) {
         return (Stage) ((javafx.scene.Node) actionEvent.getSource()).getScene().getWindow();
     }
+
     public static boolean showConfirmationButton(String content) {
 
         Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
@@ -39,4 +45,12 @@ public class Utils {
 
         return result.filter(buttonType -> buttonType == yesButton).isPresent();
     }
+
+
+    public static <T> List<T> getRandom(List<T> items, int count) {
+        // Shuffle the list
+        Collections.shuffle(items);
+        // Return the first 'count' items
+        return items.subList(0, Math.min(count, items.size()));
+    }
 }

src/main/java/at/ionas999/questioncatalog/controller/MainController.java

@@ -4,6 +4,7 @@ import at.ionas999.questioncatalog.Utils;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.stage.Stage;
+import javafx.stage.StageStyle;
 
 import java.io.IOException;
 
@@ -25,4 +26,10 @@ public class MainController {
         Stage stage = Utils.getStageFromActionEven(actionEvent);
         Utils.switchScenes("answerText.fxml", stage);
     }
+
+    @FXML
+    private void testBtnClick(ActionEvent actionEvent) throws IOException {
+        Stage stage = Utils.getStageFromActionEven(actionEvent);
+        Utils.switchScenes("test.fxml", stage);
+    }
 }

src/main/java/at/ionas999/questioncatalog/controller/TestController.java

@@ -0,0 +1,116 @@
+package at.ionas999.questioncatalog.controller;
+
+import at.ionas999.questioncatalog.Utils;
+import at.ionas999.questioncatalog.model.Question;
+import at.ionas999.questioncatalog.model.QuestionCatalog;
+import at.ionas999.questioncatalog.services.QuestionCatalogService;
+import at.ionas999.questioncatalog.services.QuestionService;
+import javafx.beans.binding.Bindings;
+import javafx.beans.property.BooleanProperty;
+import javafx.beans.property.SimpleBooleanProperty;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.scene.control.*;
+import javafx.util.converter.NumberStringConverter;
+
+import java.lang.reflect.Array;
+import java.sql.SQLException;
+import java.util.ArrayList;
+
+public class TestController {
+
+    @FXML
+    private Button nextQuestionBtn;
+    @FXML
+    private Button startBtn;
+    @FXML
+    private ComboBox catalogComboBox;
+    @FXML
+    private TextField questionCountField;
+    @FXML
+    private Slider questionSlider;
+    @FXML
+    private Label questionLabel;
+    @FXML
+    private TextArea userAnswerArea;
+    @FXML
+    private TextArea correctAnswerArea;
+    @FXML
+    private Button correctBtn;
+    @FXML
+    private Button incorrectBtn;
+
+    private BooleanProperty isInCorrectionState = new SimpleBooleanProperty(false);
+    private BooleanProperty isInConfiguringState = new SimpleBooleanProperty(true);
+
+    private ObservableList<QuestionCatalog> catalogs;
+    private ObservableList<Question>  questions;
+    private ArrayList<String> answers = new ArrayList<>();
+    private int currentIdx = 0;
+
+    @FXML
+    private void initialize() throws SQLException {
+        catalogs = FXCollections.observableList(QuestionCatalogService.GetCatalogsWithoutQuestions());
+        catalogComboBox.setItems(catalogs);
+        correctAnswerArea.visibleProperty().bind(isInCorrectionState);
+        correctBtn.visibleProperty().bind(isInCorrectionState);
+        incorrectBtn.visibleProperty().bind(isInCorrectionState);
+        userAnswerArea.editableProperty().bind(isInCorrectionState.not());
+        questionSlider.disableProperty().bind(isInConfiguringState.not());
+        questionCountField.disableProperty().bind(isInConfiguringState.not());
+        catalogComboBox.disableProperty().bind(isInConfiguringState.not());
+        startBtn.textProperty().bind(Bindings.when(isInConfiguringState).then("Start").otherwise("Cancle"));
+        nextQuestionBtn.disableProperty().bind(isInConfiguringState);
+        nextQuestionBtn.visibleProperty().bind(isInCorrectionState.not());
+
+        Bindings.bindBidirectional(questionCountField.textProperty(), questionSlider.valueProperty(), new NumberStringConverter());
+
+        questionSlider.setBlockIncrement(1);
+        questionSlider.valueProperty().addListener((_, _, newValue) -> {
+            questionSlider.setValue(newValue.intValue());
+        });
+
+        catalogComboBox.valueProperty().addListener((_,_,newValue) -> {
+            if(newValue == null)
+                return;
+            QuestionCatalog c = (QuestionCatalog) newValue;
+            try {
+                this.questionSlider.setMax(QuestionCatalogService.GetAmountOfQuestionsFromCatalog(c.getId()));
+            } catch (SQLException e) {
+                throw new RuntimeException(e);
+            }
+        });
+
+    }
+
+    @FXML
+    private void onCorrectBtnClick(ActionEvent actionEvent) {
+    }
+
+    @FXML
+    private void onIncorrectBtnClick(ActionEvent actionEvent) {
+    }
+
+    public void onStartTestBtnClick(ActionEvent actionEvent) throws SQLException {
+        this.isInConfiguringState.setValue(false);
+        ArrayList<Question> questions = QuestionService
+                .GetQuestionsFromCatalog(((QuestionCatalog) catalogComboBox.getValue()).getId());
+        this.questions = FXCollections.observableList(Utils.getRandom(questions, (int) this.questionSlider.getValue()));
+        this.questionLabel.setText(this.questions.get(currentIdx).getQuestion());
+    }
+
+    public void showNextQuestion(ActionEvent actionEvent) {
+        this.answers.add(this.userAnswerArea.getText());
+        currentIdx++;
+        if(currentIdx >= this.questions.size())
+        {
+            this.isInCorrectionState.setValue(true);
+            this.questionLabel.setText("Rate your Answers !");
+            return;
+        }
+        this.userAnswerArea.clear();
+        this.questionLabel.setText(this.questions.get(currentIdx).getQuestion());
+    }
+}

src/main/java/at/ionas999/questioncatalog/services/QuestionCatalogService.java

@@ -67,6 +67,23 @@ public class QuestionCatalogService {
 
         return true;
     }
+
+    public static int GetAmountOfQuestionsFromCatalog(int id) throws SQLException {
+        String stmtString = "SELECT COUNT(*) FROM QUESTION WHERE QUESTIONCATALOGID = ?";
+        int count = 0;
+
+        try (Connection connection = ServiceBase.GetJDBCConnection()) {
+            try (PreparedStatement statement = connection.prepareStatement(stmtString)) {
+                statement.setInt(1, id);
+                ResultSet rs = statement.executeQuery();
+                if (rs.next()) {
+                    count = rs.getInt(1);
+                }
+            }
+        }
+
+        return count;
+    }
     public static ArrayList<QuestionCatalog> GetCatalogsWithoutQuestions() throws SQLException {
         String stmtString = "select id, name from QUESTIONCATALOG";
 

src/main/resources/at/ionas999/questioncatalog/main.fxml

@@ -13,5 +13,6 @@
         <Button text="Add New" onAction="#addNewBtnClick" prefWidth="150" />
         <Button text="View" onAction="#viewBtnClick" prefWidth="149" />
         <Button text="Learn" onAction="#learnBtnClick" prefWidth="150" />
+        <Button text="Test" onAction="#testBtnClick" prefWidth="150" />
     </VBox>
 </VBox>

src/main/resources/at/ionas999/questioncatalog/test.fxml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?import javafx.scene.control.*?>
+<?import javafx.scene.layout.*?>
+
+<AnchorPane xmlns="http://javafx.com/javafx"
+            xmlns:fx="http://javafx.com/fxml"
+            prefWidth="600.0" prefHeight="400.0"
+            fx:controller="at.ionas999.questioncatalog.controller.TestController">
+    <children>
+        <VBox spacing="20" alignment="CENTER" AnchorPane.topAnchor="10.0" AnchorPane.leftAnchor="10.0"
+              AnchorPane.rightAnchor="10.0">
+            <!-- Start Test Button -->
+            <Button text="Start Test" fx:id="startBtn" onAction="#onStartTestBtnClick"/>
+            <!-- Slider and Input Box -->
+            <HBox spacing="10" alignment="CENTER">
+                <Label text="Number of Questions:"/>
+                <TextField fx:id="questionCountField"  promptText="Enter amount"/>
+                <Slider fx:id="questionSlider" min="1" max="10"  showTickLabels="true" showTickMarks="true"/>
+                <ComboBox fx:id="catalogComboBox" promptText="Choose a catalog" />
+            </HBox>
+
+            <!-- Question Display -->
+            <Label fx:id="questionLabel" text="Question will appear here" style="-fx-font-size: 18;"/>
+
+            <!-- User Input Box -->
+            <TextArea fx:id="userAnswerArea"  promptText="Enter your answer here..." wrapText="true" prefHeight="100.0"
+                      prefWidth="300.0"/>
+
+            <Button text="Next Question" fx:id="nextQuestionBtn" onAction="#showNextQuestion"/>
+
+            <!-- Correct Answer Display -->
+            <VBox spacing="10" alignment="CENTER">
+                <Label text="Correct Answer:" style="-fx-font-size: 14;"/>
+                <TextArea fx:id="correctAnswerArea" editable="false" wrapText="true" prefHeight="100.0"
+                          prefWidth="300.0"/>
+            </VBox>
+
+            <!-- Correct and Incorrect Buttons -->
+            <HBox spacing="10" alignment="CENTER">
+                <Button text="Correct" fx:id="correctBtn" onAction="#onCorrectBtnClick"/>
+                <Button text="Incorrect" fx:id="incorrectBtn" onAction="#onIncorrectBtnClick"/>
+            </HBox>
+        </VBox>
+    </children>
+</AnchorPane>