added tests for the ui

Author: darkhyper24

bloC/pom.xml

@@ -8,9 +8,7 @@
         <artifactId>java-design-patterns</artifactId>
         <version>1.26.0-SNAPSHOT</version>
     </parent>
-
     <artifactId>bloC</artifactId>
-
     <properties>
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
@@ -22,6 +20,21 @@
             <artifactId>junit-jupiter-api</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.testng</groupId>
+            <artifactId>testng</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
-
 </project>

bloC/src/test/java/com/iluwatar/bloc/MainTest.java

@@ -0,0 +1,98 @@
+package com.iluwatar.bloc;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import javax.swing.*;
+import java.awt.*;
+
+import static org.junit.Assert.assertEquals;
+
+public class MainTest {
+
+  private JFrame frame;
+  private JLabel counterLabel;
+  private JButton incrementButton;
+  private JButton decrementButton;
+  private JButton toggleListenerButton;
+  private Bloc bloc;
+  private StateListener<State> stateListener;
+
+  @Before
+  public void setUp() {
+    bloc = new Bloc();  // Re-initialize the Bloc for each test
+
+    frame = new JFrame("BloC example");
+    frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
+    frame.setSize(400, 300);
+
+    counterLabel = new JLabel("Counter: 0", SwingConstants.CENTER);
+    counterLabel.setFont(new Font("Arial", Font.BOLD, 20));
+
+    incrementButton = new JButton("Increment");
+    decrementButton = new JButton("Decrement");
+    toggleListenerButton = new JButton("Disable Listener");
+
+    frame.setLayout(new BorderLayout());
+    frame.add(counterLabel, BorderLayout.CENTER);
+    frame.add(incrementButton, BorderLayout.NORTH);
+    frame.add(decrementButton, BorderLayout.SOUTH);
+    frame.add(toggleListenerButton, BorderLayout.EAST);
+
+    stateListener = state -> counterLabel.setText("Counter: " + state.getValue());
+    bloc.addListener(stateListener);
+
+    incrementButton.addActionListener(e -> bloc.increment());
+    decrementButton.addActionListener(e -> bloc.decrement());
+    toggleListenerButton.addActionListener(e -> {
+      if (bloc.getListeners().contains(stateListener)) {
+        bloc.removeListener(stateListener);
+        toggleListenerButton.setText("Enable Listener");
+      } else {
+        bloc.addListener(stateListener);
+        toggleListenerButton.setText("Disable Listener");
+      }
+    });
+
+    frame.setVisible(true);
+  }
+
+  @After
+  public void tearDown() {
+    frame.dispose();
+    bloc = new Bloc();  // Reset Bloc state after each test to avoid state carryover
+  }
+
+
+  @Test
+  public void testIncrementButton() {
+    simulateButtonClick(incrementButton);
+    assertEquals("Counter: 1", counterLabel.getText());
+  }
+
+  @Test
+  public void testDecrementButton() {
+    simulateButtonClick(decrementButton);
+    assertEquals("Counter: -1", counterLabel.getText());
+  }
+
+  @Test
+  public void testToggleListener() {
+    // Disable listener
+    simulateButtonClick(toggleListenerButton);
+    simulateButtonClick(incrementButton);
+    assertEquals("Counter: 0", counterLabel.getText()); // Listener is disabled
+
+    // Enable listener
+    simulateButtonClick(toggleListenerButton);
+    simulateButtonClick(incrementButton);
+    assertEquals("Counter: 2", counterLabel.getText()); // Listener is re-enabled
+  }
+
+  private void simulateButtonClick(JButton button) {
+    for (var listener : button.getActionListeners()) {
+      listener.actionPerformed(null);
+    }
+  }
+}