adding unittest to URIV4FormatValidator

Author: erosb

core/src/test/java/org/everit/json/schema/internal/URIV4FormatValidatorTest.java

@@ -0,0 +1,24 @@
+package org.everit.json.schema.internal;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class URIV4FormatValidatorTest {
+
+    @Test
+    public void relativeURI() {
+        assertFalse(new URIV4FormatValidator().validate("abc").isPresent());
+    }
+
+    @Test
+    public void absoluteURI() {
+        assertFalse(new URIV4FormatValidator().validate("http://a.b.c").isPresent());
+    }
+
+    @Test
+    public void notURI() {
+        assertTrue(new URIV4FormatValidator().validate("\\\\\\\\WINDOWS\\\\fileshare").isPresent());
+    }
+}