Fixes unchecked warnings when calling Mockito.mock(Class)

This is an issue well known by the Mockito community, but prone to not
be fixed:
mockito/mockito#1531

Generics allow to ensure type-safety at compile time instead of runtime.
However, here it is used mainly to auto-cast the created object, thus
avoiding this burden on the developer. Indeed, it is in a context where
type safety is usually not a requirement, since the use of this method
is often the most trivial we can have: provide a class and expect a very
instance of this class in return.

This commit thus creates a less constrained mock method which builds on
Mockito's one, but without the constraint inducing this warning.

javaparser-core-testing/src/test/java/com/github/javaparser/ast/visitor/GenericListVisitorAdapterTest.java

@@ -38,7 +38,6 @@
 import java.util.Optional;
 
 import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 
 class GenericListVisitorAdapterTest {
@@ -2550,4 +2549,10 @@ void visit_CompactConstructorDeclaration () {
         order.verifyNoMoreInteractions();
     }
 
+	@SuppressWarnings("unchecked")
+	// Non type-safe mock method to avoid unchecked warnings
+	// Its use is trivial and systematic enough to not be a problem
+	private <T> T mock(Class<?> classToMock) {
+		return (T) Mockito.mock(classToMock);
+	}
 }

javaparser-core-testing/src/test/java/com/github/javaparser/ast/visitor/GenericVisitorAdapterTest.java

@@ -37,7 +37,6 @@
 import java.util.Optional;
 
 import static org.junit.jupiter.api.Assertions.assertNull;
-import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 
 public class GenericVisitorAdapterTest {
@@ -2549,4 +2548,10 @@ void visit_CompactConstructorDeclaration () {
         order.verifyNoMoreInteractions();
     }
 
+	@SuppressWarnings("unchecked")
+	// Non type-safe mock method to avoid unchecked warnings
+	// Its use is trivial and systematic enough to not be a problem
+	private <T> T mock(Class<?> classToMock) {
+		return (T) Mockito.mock(classToMock);
+	}
 }