adding format name checks to SpecificationVersionTest

Author: erosb

core/src/test/java/org/everit/json/schema/loader/SpecificationVersionTest.java

@@ -1,11 +1,15 @@
 package org.everit.json.schema.loader;
 
 import static java.util.Arrays.asList;
+import static org.everit.json.schema.loader.SpecificationVersion.DRAFT_4;
 import static org.everit.json.schema.loader.SpecificationVersion.DRAFT_6;
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import java.util.Map;
 import java.util.Set;
 
+import org.everit.json.schema.FormatValidator;
 import org.junit.Test;
 
 public class SpecificationVersionTest {
@@ -15,4 +19,18 @@ public void v6ContainsAdditionalFormats() {
         Set<String> actual = DRAFT_6.defaultFormatValidators().keySet();
         assertTrue(actual.containsAll(asList("json-pointer", "uri-reference", "uri-template")));
     }
+
+    @Test
+    public void v4MapMatchesFormatNames() {
+        for (Map.Entry<String, FormatValidator> entry : DRAFT_4.defaultFormatValidators().entrySet()) {
+            assertEquals(entry.getKey(), entry.getValue().formatName());
+        }
+    }
+
+    @Test
+    public void v6MapMatchesFormatNames() {
+        for (Map.Entry<String, FormatValidator> entry : DRAFT_6.defaultFormatValidators().entrySet()) {
+            assertEquals(entry.getKey(), entry.getValue().formatName());
+        }
+    }
 }