fixes #404 add test case to replicate the issue

Author: stevehu

src/test/java/com/networknt/schema/Issue404Test.java

@@ -0,0 +1,35 @@
+package com.networknt.schema;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.InputStream;
+import java.util.Set;
+
+public class Issue404Test {
+    protected JsonSchema getJsonSchemaFromStreamContentV7(InputStream schemaContent) {
+        JsonSchemaFactory factory = JsonSchemaFactory.getInstance(SpecVersion.VersionFlag.V7);
+        return factory.getSchema(schemaContent);
+    }
+
+    protected JsonNode getJsonNodeFromStreamContent(InputStream content) throws Exception {
+        ObjectMapper mapper = new ObjectMapper();
+        JsonNode node = mapper.readTree(content);
+        return node;
+    }
+
+    @Test
+    public void expectObjectNotIntegerV7() throws Exception {
+        String schemaPath = "/schema/issue404-v7.json";
+        String dataPath = "/data/issue404.json";
+        InputStream schemaInputStream = getClass().getResourceAsStream(schemaPath);
+        JsonSchema schema = getJsonSchemaFromStreamContentV7(schemaInputStream);
+        InputStream dataInputStream = getClass().getResourceAsStream(dataPath);
+        JsonNode node = getJsonNodeFromStreamContent(dataInputStream);
+        Set<ValidationMessage> errors = schema.validate(node);
+        Assert.assertEquals(0, errors.size());
+    }
+
+}

src/test/resources/data/issue404.json

@@ -0,0 +1,3 @@
+{
+  "bar": 1
+}

src/test/resources/schema/issue404-v7.json

@@ -0,0 +1,14 @@
+{
+  "$id": "https://example.com/address.schema.json",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "object",
+  "properties": {
+    "foo": {
+      "type": "object",
+      "enum": [1, 2, 3]
+    },
+    "bar": {
+      "$ref": "#/properties/foo"
+    }
+  }
+}