Add unit test for print method in PetTypeFormatter class

src/test/java/org/springframework/samples/petclinic/owner/PetTypeFormatterTest.java

@@ -0,0 +1,39 @@
+package org.springframework.samples.petclinic.owner;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.Locale;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(MockitoExtension.class)
+class PetTypeFormatterTest {
+
+	@Mock
+	private PetType petType;
+
+	@InjectMocks
+	private PetTypeFormatter petTypeFormatter;
+
+	@BeforeEach
+	void setUp() {
+		given(petType.getName()).willReturn("Dog");
+	}
+
+	@Test
+	@DisplayName("Test print method")
+	void testPrint() {
+		String result = petTypeFormatter.print(petType, Locale.ENGLISH);
+		assertThat(result).isEqualTo("Dog");
+		verify(petType).getName();
+	}
+
+}