continue schema validation if version is missing, adjusted test

core/src/main/java/dev/fitko/fitconnect/core/validation/DefaultValidationService.java

@@ -108,9 +108,7 @@ public class DefaultValidationService implements ValidationService {
     @Override
     public ValidationResult validateMetadataSchema(final Metadata metadata) {
 
-        if (metadata.getSchema() == null || metadata.getSchema().isEmpty()) {
-            return ValidationResult.ok();
-        } else if (!metadata.getSchema().matches(VALID_SCHEMA_URL_EXPRESSION)) {
+        if (metadata.getSchema() != null && !metadata.getSchema().isEmpty() && !metadata.getSchema().matches(VALID_SCHEMA_URL_EXPRESSION)) {
             return ValidationResult.error(new ValidationException("The provided metadata schema is not supported."));
         }
 

core/src/test/java/dev/fitko/fitconnect/core/validation/DefaultValidationServiceTest.java

@@ -196,9 +196,15 @@ class DefaultValidationServiceTest {
     }
 
     @Test
-    void validateMetadataWithoutSchemaAttribute() {
+    void validateMetadataWithoutSchemaAttributeButValidSchema() {
 
-        assertTrue(this.underTest.validateMetadataSchema(new Metadata()).isValid());
+        final var contentStructure = new ContentStructure();
+        contentStructure.setAttachments(Collections.emptyList());
+
+        final var metadata = new Metadata();
+        metadata.setContentStructure(contentStructure);
+
+        assertTrue(this.underTest.validateMetadataSchema(metadata).isValid());
     }
 
     @Test