fixes #25 enable undertow server for remote ref tests

Author: stevehu

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

@@ -19,19 +19,53 @@
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ArrayNode;
+import io.undertow.Undertow;
+import io.undertow.server.HttpHandler;
+import io.undertow.server.handlers.resource.FileResource;
+import io.undertow.server.handlers.resource.FileResourceManager;
+import org.junit.AfterClass;
 import org.junit.Assert;
+import org.junit.BeforeClass;
 import org.junit.Test;
 
+import java.io.File;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 
+import static io.undertow.Handlers.resource;
+
 public class JsonSchemaTest {
     protected ObjectMapper mapper = new ObjectMapper();
+    protected static Undertow server = null;
 
     public JsonSchemaTest() {
     }
 
+    @BeforeClass
+    public static void setUp() {
+        if(server == null) {
+            server = Undertow.builder()
+                    .addHttpListener(1234, "localhost")
+                    .setHandler(resource(new FileResourceManager(
+                            new File("./src/test/resources/tests"), 100)))
+                    .build();
+            server.start();
+        }
+    }
+
+    @AfterClass
+    public static void tearDown() throws Exception {
+        if(server != null) {
+            try {
+                Thread.sleep(100);
+            } catch (InterruptedException ignored) {
+
+            }
+            server.stop();
+        }
+    }
+
     private void runTestFile(String testCaseFile) throws Exception {
         InputStream in = Thread.currentThread().getContextClassLoader()
                 .getResourceAsStream(testCaseFile);

src/test/resources/tests/integer.json

@@ -0,0 +1,3 @@
+{
+	"type": "integer"
+}

src/test/resources/tests/subSchemas.json

@@ -0,0 +1,8 @@
+{
+	"integer" : {
+		"type" : "integer"
+	},
+	"refToInteger" : {
+		"$ref" : "#/integer"
+	}
+}