Add hasNoJsonPath testcase for explicit null

json-path-assert/src/test/java/com/jayway/jsonpath/matchers/HasNoJsonPathTest.java

@@ -8,6 +8,7 @@ import static org.junit.Assert.assertThat;
 
 public class HasNoJsonPathTest {
     private static final String JSON_STRING = "{" +
+            "\"none\": null," +
             "\"name\": \"Jessie\"" +
             "}";
 
@@ -21,6 +22,11 @@ public class HasNoJsonPathTest {
         assertThat(JSON_STRING, not(hasNoJsonPath("$.name")));
     }
 
+    @Test
+    public void shouldNotMatchExplicitNull() {
+        assertThat(JSON_STRING, not(hasNoJsonPath("$.none")));
+    }
+
     @Test
     public void shouldBeDescriptive() {
         assertThat(hasNoJsonPath("$.name"),