JSON writing tests

src/codeu/chat/server/JSON.java

@@ -8,9 +8,11 @@
 import codeu.chat.common.Message;
 import codeu.chat.common.User;
 
+import com.fasterxml.jackson.core.JsonGenerationException;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
 import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
@@ -106,6 +108,18 @@ private void save(Object obj, String arrayName) {
 			e.printStackTrace();
 		}
 	}
+
+	/**
+	 * Used to erase all saved content and place a blank array
+	 */
+	public void clearFile() {
+		JsonNode blankNode = createNodeWithBlankArrays();
+		try {
+			new ObjectMapper().writer(new DefaultPrettyPrinter()).writeValue(new File(fileName), blankNode);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
 
 	/**
 	 * Appends a user to the json file

test.json

@@ -0,0 +1,19 @@
+{
+  "users" : [ {
+    "name" : "Krager",
+    "uuid" : "1.1074501217",
+    "creationTime" : "31-Dec-1969 17:11:49.509"
+  } ],
+  "conversations" : [ {
+    "title" : "Chat1",
+    "uuid" : "1.3959833157",
+    "ownerUUID" : "1.1074501217",
+    "creationTime" : "01-Jan-1970 08:30:08.509"
+  } ],
+  "messages" : [ {
+    "content" : "I'm so alone",
+    "authorUUID" : "1.1074501217",
+    "uuid" : "1.3928689216",
+    "creationTime" : "01-Jan-1970 05:46:24.908"
+  } ]
+}