[T4A6][T13-B1] Hong Bangwu

src/seedu/addressbook/data/tag/Tagging.java

@@ -0,0 +1,35 @@
+package seedu.addressbook.data.tag;
+
+import seedu.addressbook.data.person.Name;
+import seedu.addressbook.data.person.Person;
+
+public class Tagging {
+
+	Name name;
+	Tag tag;
+	//isValid tells us whether the tag is still available after the change occurred.
+	boolean isValid;
+
+/*
+ * object will be initialised whenever a tag is added or removed. the method called to do so will provide a reference to 
+ * the tag object, the person object, as well as whether the affected tag's validity to the person.
+ */
+	public Tagging(Tag tagAffected, Person person, boolean validity) {
+		name = person.getName();
+		isValid = validity;
+		tag = tagAffected;
+	}
+
+	public String outputTaggings() {
+		String output = "";
+		if (isValid) {
+			output += "+ ";
+		} else output += "- ";
+
+		output += name.toString();
+		output += tag.toString();
+
+		return output;
+	}
+
+}

test/java/seedu/addressbook/parser/UtilsTest.java

@@ -0,0 +1,53 @@
+package seedu.addressbook.parser;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+import seedu.addressbook.data.person.Name;
+import seedu.addressbook.common.Utils;
+import seedu.addressbook.data.exception.IllegalValueException;
+import seedu.addressbook.data.person.*; 
+
+public class UtilsTest {
+
+	@Test
+	public void isAnyNullTest() {
+			Utils Util = new Utils();
+		    Name name = null;
+
+			//test case 1: return true for a name that is actually a null
+			assertTrue(Utils.isAnyNull(name));
+	}
+
+	@Test
+	public void isAnyNullTest1() {
+		try {
+			Utils Util = new Utils();
+			Name name2 = new Name("Andy Tan");
+			Name name3 = new Name("Joshua Soh");
+
+			//test case 2: return false if no nulls among objects passed in
+			assertFalse(Utils.isAnyNull(name2, name3));
+
+		} catch (IllegalValueException e) {
+		}
+	}
+
+	@Test
+	public void isAnyNullTest2() {
+		try {
+			Utils Util = new Utils();
+		    Name name = null;
+			Name name2 = new Name("Andy Tan");
+			Name name3 = new Name("Joshua Soh");
+
+			//test case 3: return true if one of the name object is actually null
+			assertTrue(Utils.isAnyNull(name, name2, name3));
+
+		} catch (IllegalValueException e) {
+		}
+	}
+
+
+}