Updated to make the code simpler to understand for PowerMock usage (#2772)

mockito/src/test/java/com/baeldung/powermockito/introduction/LuckyNumberGenerator.java

@@ -4,23 +4,24 @@ class LuckyNumberGenerator {
 
     public int getLuckyNumber(String name) {
 
-        record(name);
+        saveIntoDatabase(name);
 
         if (name == null) {
             return getDefaultLuckyNumber();
         }
 
-        return getLuckyNumber(name.length() + 1);
+        return getComputedLuckyNumber(name.length());
     }
 
-    private void record(String name) {
+    private void saveIntoDatabase(String name) {
+        // Save the name into the database
     }
 
     private int getDefaultLuckyNumber() {
         return 100;
     }
 
-    private int getLuckyNumber(int length) {
+    private int getComputedLuckyNumber(int length) {
         return length < 5 ? 5 : 10000;
     }
 

mockito/src/test/java/com/baeldung/powermockito/introduction/LuckyNumberGeneratorTest.java

@@ -31,7 +31,7 @@ public class LuckyNumberGeneratorTest {
     public final void givenPrivateMethodWithArgumentAndReturn_whenUsingPowerMockito_thenCorrect() throws Exception {
         LuckyNumberGenerator mock = spy(new LuckyNumberGenerator());
 
-        doReturn(1).when(mock, "getLuckyNumber", ArgumentMatchers.anyInt());
+        doReturn(1).when(mock, "getComputedLuckyNumber", ArgumentMatchers.anyInt());
 
         int result = mock.getLuckyNumber("Jack");
 
@@ -44,7 +44,7 @@ public class LuckyNumberGeneratorTest {
 
         int result = mock.getLuckyNumber("Tyranosorous");
 
-        verifyPrivate(mock).invoke("record", ArgumentMatchers.anyString());
+        verifyPrivate(mock).invoke("saveIntoDatabase", ArgumentMatchers.anyString());
         assertEquals(10000, result);
     }