TimeTest.java

package com.tfltravelalerts.test;

import junit.framework.TestCase;

import com.google.gson.GsonBuilder;
import com.tfltravelalerts.model.Time;

public class TimeTest extends TestCase {
	private final Time tenToEleven = new Time(10, 50);
	private final Time tenToNoon = new Time(11, 50);
	private final Time noon = new Time(12, 00);
	private final Time tenPastNoon = new Time(12, 10);
	private final Time tenToMidnight = new Time(23, 50);
	private final Time tenPastMidnight = new Time(00, 10);

	public void testSameTimeReturnsZero() {
		Time startTime = new Time(12, 00);
		assertEquals(noon.differenceTo(startTime), 0);
	}

	public void testSimpleTimeDifferences() {
		
		assertEquals(noon.differenceTo(tenPastNoon), 10);
		assertEquals(noon.differenceTo(tenToNoon), -10);
		assertEquals(tenPastNoon.differenceTo(noon), -10);
		assertEquals(tenToNoon.differenceTo(noon), 10);
		assertEquals(tenToEleven.differenceTo(tenPastNoon), 80);
		assertEquals(tenPastNoon.differenceTo(tenToEleven), -80);
	}
	
	public void testDayWrapping() {
		assertEquals(tenToMidnight.differenceTo(tenPastMidnight), -1420);
		assertEquals(tenPastMidnight.differenceTo(tenToMidnight), 1420);
	}
	
	public void testSerializeAndRestore() {
	    String json = new GsonBuilder().create().toJson(tenPastNoon);
	    Time restoredObject = new GsonBuilder().create().fromJson(json, Time.class);
        assertEquals(tenPastNoon, restoredObject);
	}

    public void testSerialization() {
        String json = new GsonBuilder().create().toJson(tenPastNoon);
        assertEquals(json, "{\"mHour\":12,\"mMinute\":10}");
    }
    public void testDeserialization() {
        String json = "{\"mHour\":12,\"mMinute\":10}";
        Time restoredObject = new GsonBuilder().create().fromJson(json, Time.class);
        assertEquals(tenPastNoon, restoredObject);
    }

}