MAT-10263 add tests

Author: ethankaplan

src/test/java/gov/cms/madie/madiefhirservice/services/ResourceValidationServiceTest.java

@@ -27,6 +27,7 @@
 import org.mockito.Mockito;
 import org.mockito.Spy;
 import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.test.util.ReflectionTestUtils;
 
 import java.util.List;
 import java.util.Set;
@@ -672,6 +673,20 @@ void testValidateBundleReferencesForExecutionReportsCarePlanNestedReferencePath(
                 + "reference that do not resolve within the bundle.\n\n- activity.detail.performer"));
   }
 
+  @Test
+  void testAppendAttributePath() {
+    assertThat(
+        ReflectionTestUtils.invokeMethod(validationService, "appendAttributePath", "", "performer"),
+        is(equalTo("performer")));
+    assertThat(
+        ReflectionTestUtils.invokeMethod(validationService, "appendAttributePath", "activity", ""),
+        is(equalTo("activity")));
+    assertThat(
+        ReflectionTestUtils.invokeMethod(
+            validationService, "appendAttributePath", "activity.detail", "performer"),
+        is(equalTo("activity.detail.performer")));
+  }
+
   @Test
   void testValidateBundleWithNullBundleThrowsException() {
     // Act & Assert