Add testcase for save long maximum number.

sample/src/androidTest/java/com/litepaltest/model/IdCard.java

@@ -7,6 +7,7 @@ public class IdCard extends LitePalSupport {
 	private String number;
 	private String address;
 	private Student student;
+	private long serial;
 //	private Teacher teacher;
 
 	/**
@@ -68,4 +69,11 @@ public class IdCard extends LitePalSupport {
 		this.student = student;
 	}
 
+	public long getSerial() {
+		return serial;
+	}
+
+	public void setSerial(long serial) {
+		this.serial = serial;
+	}
 }

sample/src/androidTest/java/com/litepaltest/test/crud/save/SaveTest.java

@@ -235,4 +235,14 @@ public class SaveTest extends LitePalTestCase {
         }
     }
 
+    @Test
+    public void testSaveLongMaximumNumber() {
+    	IdCard idCard = new IdCard();
+    	idCard.setSerial(Long.MAX_VALUE);
+    	idCard.setAddress("abczyx");
+    	assertTrue(idCard.save());
+    	IdCard idCardFromDB = LitePal.find(IdCard.class, idCard.getId());
+    	assertEquals(Long.MAX_VALUE, idCardFromDB.getSerial());
+	}
+
 }
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