add passing tests for #2932

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/databind/node/JsonPointerWithNodeTest.java

@@ -6,12 +6,16 @@
 public class JsonPointerWithNodeTest
     extends BaseMapTest
 {
+    private final ObjectMapper MAPPER = newJsonMapper();
+    
     public void testIt() throws Exception
     {
-        final JsonNode SAMPLE_ROOT = objectMapper().readTree(SAMPLE_DOC_JSON_SPEC);
+        final JsonNode SAMPLE_ROOT = MAPPER.readTree(SAMPLE_DOC_JSON_SPEC);
 
         // first: "empty" pointer points to context node:
         assertSame(SAMPLE_ROOT, SAMPLE_ROOT.at(JsonPointer.compile("")));
+        // second: "/" is NOT root, but "root property with name of Empty String"
+        assertTrue(SAMPLE_ROOT.at(JsonPointer.compile("/")).isMissingNode());
 
         // then simple reference
         assertTrue(SAMPLE_ROOT.at(JsonPointer.compile("/Image")).isObject());
@@ -32,18 +36,25 @@ public void testIt() throws Exception
         assertTrue(SAMPLE_ROOT.at("/Image/1").isMissingNode());
     }
 
-    // To help verify [Core#133]; should be fine with "big numbers" as property keys
+    // To help verify [core#133]; should be fine with "big numbers" as property keys
     public void testLongNumbers() throws Exception
     {
-        
         // First, with small int key
-        JsonNode root = objectMapper().readTree("{\"123\" : 456}");
+        JsonNode root = MAPPER.readTree("{\"123\" : 456}");
         JsonNode jn2 = root.at("/123"); 
         assertEquals(456, jn2.asInt());
 
         // and then with above int-32:
-        root = objectMapper().readTree("{\"35361706045\" : 1234}");
+        root = MAPPER.readTree("{\"35361706045\" : 1234}");
         jn2 = root.at("/35361706045"); 
         assertEquals(1234, jn2.asInt());
     }
+
+    // [databind#2934]
+    public void testIssue2934() throws Exception
+    {
+        JsonNode tree = MAPPER.readTree("{\"\" : 123}");
+        assertEquals(123, tree.at("/").intValue());
+        assertSame(tree, tree.at(""));
+    }
 }