Implement WXA custom message related APIs.

weixin4j-wxa/src/test/java/com/foxinmy/weixin4j/wxa/api/CustomMessageAdaptersTest.java

@@ -0,0 +1,24 @@
+package com.foxinmy.weixin4j.wxa.api;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.alibaba.fastjson.JSON;
+import com.foxinmy.weixin4j.wxa.model.custommessage.CustomMessage;
+import com.foxinmy.weixin4j.wxa.model.custommessage.Text;
+
+public class CustomMessageAdaptersTest {
+
+	@Test
+	public void testToMap() {
+		CustomMessage customMessage = new CustomMessage();
+		customMessage.setToUser("OPENID");
+		customMessage.setTuple(new Text("Hello World"));
+
+		String json = JSON.toJSONString(CustomMessageAdapters.toMap(customMessage));
+		System.out.println(json);
+		assertEquals("{\"touser\":\"OPENID\",\"text\":{\"content\":\"Hello World\"},\"msgtype\":\"text\"}", json);
+	}
+
+}

weixin4j-wxa/src/test/java/com/foxinmy/weixin4j/wxa/model/custommessage/CommandTest.java

@@ -0,0 +1,15 @@
+package com.foxinmy.weixin4j.wxa.model.custommessage;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class CommandTest {
+
+	@Test
+	public void testToString() {
+		assertEquals("Typing", Command.TYPING.toString());
+		assertEquals("CancelTyping", Command.CANCEL_TYPING.toString());
+	}
+
+}