Add unit tests for ActiveBuzzerHelper

pi4micronaut-utils/src/test/java/com/opensourcewithslu/outputdevices/ActiveBuzzerHelper.java

@@ -0,0 +1,58 @@
+package com.opensourcewithslu.outputdevices;
+import com.pi4j.io.pwm.Pwm;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import java.util.concurrent.TimeUnit;
+import static org.mockito.Mockito.*;
+
+class ActiveBuzzerHelperTest {
+    private Pwm mockPwm;
+    private ActiveBuzzerHelper buzzerHelper;
+
+    @BeforeEach
+    void setUp() {
+        mockPwm = Mockito.mock(Pwm.class);
+        buzzerHelper = new ActiveBuzzerHelper(mockPwm);
+    }
+
+    @Test
+    void testActiveBuzzerOn() {
+        buzzerHelper.activeBuzzerOn();
+
+        verify(mockPwm).on();
+        verify(mockPwm).dutyCycle(50);
+        verify(mockPwm).frequency(1000);
+    }
+
+    @Test
+    void testActiveBuzzerOff() {
+        buzzerHelper.activeBuzzerOff();
+
+        verify(mockPwm).off();
+    }
+
+    @Test
+    void testBeep() throws InterruptedException {
+        buzzerHelper.beep();
+
+        verify(mockPwm, atLeastOnce()).on();
+        verify(mockPwm, atLeastOnce()).off();
+    }
+
+    @Test
+    void testIntermittentTone() throws InterruptedException {
+        buzzerHelper.intermittentTone();
+
+        verify(mockPwm, atLeastOnce()).on();
+        verify(mockPwm, atLeastOnce()).off();
+    }
+
+    @Test
+    void testMorseCodeTone() throws InterruptedException {
+        buzzerHelper.morseCodeTone();
+
+        verify(mockPwm, atLeastOnce()).on();
+        verify(mockPwm, atLeastOnce()).off();
+    }
+}