Android example source code file (MonthDisplayHelperTest.java)

This example Android source code file (MonthDisplayHelperTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, mediumtest, monthdisplayhelper, monthdisplayhelpertest, smalltest, test, testcase, util

The MonthDisplayHelperTest.java Android example source code

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.util;

import junit.framework.TestCase;
import junit.framework.Test;
import junit.framework.TestSuite;

import java.util.Calendar;
import android.test.suitebuilder.annotation.SmallTest;
import android.test.suitebuilder.annotation.MediumTest;

/**
 * Unit tests for {@link MonthDisplayHelper}.
 */
public class MonthDisplayHelperTest extends TestCase {


    @SmallTest
    public void testFirstDayOfMonth() {

        assertEquals("august 2007",
                Calendar.WEDNESDAY,
                new MonthDisplayHelper(2007, Calendar.AUGUST).getFirstDayOfMonth());

        assertEquals("september, 2007",
                Calendar.SATURDAY,
                new MonthDisplayHelper(2007, Calendar.SEPTEMBER).getFirstDayOfMonth());
    }

    @MediumTest
    public void testNumberOfDaysInCurrentMonth() {
        assertEquals(30,
                new MonthDisplayHelper(2007, Calendar.SEPTEMBER).getNumberOfDaysInMonth());
    }

    @SmallTest
    public void testMonthRows() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007, Calendar.SEPTEMBER);

        assertArraysEqual(new int[]{26, 27, 28, 29, 30, 31, 1},
                helper.getDigitsForRow(0));
        assertArraysEqual(new int[]{2, 3, 4, 5, 6, 7, 8},
                helper.getDigitsForRow(1));
        assertArraysEqual(new int[]{30, 1, 2, 3, 4, 5, 6},
                helper.getDigitsForRow(5));

    }

    @SmallTest
    public void testMonthRowsWeekStartsMonday() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.SEPTEMBER, Calendar.MONDAY);

        assertArraysEqual(new int[]{27, 28, 29, 30, 31, 1, 2},
                helper.getDigitsForRow(0));
        assertArraysEqual(new int[]{3, 4, 5, 6, 7, 8, 9},
                helper.getDigitsForRow(1));
        assertArraysEqual(new int[]{24, 25, 26, 27, 28, 29, 30},
                helper.getDigitsForRow(4));
        assertArraysEqual(new int[]{1, 2, 3, 4, 5, 6, 7},
                helper.getDigitsForRow(5));
    }

    @SmallTest
    public void testMonthRowsWeekStartsSaturday() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.SEPTEMBER, Calendar.SATURDAY);

        assertArraysEqual(new int[]{1, 2, 3, 4, 5, 6, 7},
                helper.getDigitsForRow(0));
        assertArraysEqual(new int[]{8, 9, 10, 11, 12, 13, 14},
                helper.getDigitsForRow(1));
        assertArraysEqual(new int[]{29, 30, 1, 2, 3, 4, 5},
                helper.getDigitsForRow(4));


        helper = new MonthDisplayHelper(2007,
                Calendar.AUGUST, Calendar.SATURDAY);

        assertArraysEqual(new int[]{28, 29, 30, 31, 1, 2, 3},
                helper.getDigitsForRow(0));
        assertArraysEqual(new int[]{4, 5, 6, 7, 8, 9, 10},
                helper.getDigitsForRow(1));
        assertArraysEqual(new int[]{25, 26, 27, 28, 29, 30, 31},
                helper.getDigitsForRow(4));
    }

    @SmallTest
    public void testGetDayAt() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.SEPTEMBER, Calendar.SUNDAY);

        assertEquals(26, helper.getDayAt(0, 0));
        assertEquals(1, helper.getDayAt(0, 6));
        assertEquals(17, helper.getDayAt(3, 1));
        assertEquals(2, helper.getDayAt(5, 2));
    }

    @SmallTest
    public void testPrevMonth() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.SEPTEMBER, Calendar.SUNDAY);

        assertArraysEqual(new int[]{26, 27, 28, 29, 30, 31, 1},
                helper.getDigitsForRow(0));

        helper.previousMonth();

        assertEquals(Calendar.AUGUST, helper.getMonth());
        assertArraysEqual(new int[]{29, 30, 31, 1, 2, 3, 4},
                helper.getDigitsForRow(0));
    }

    @SmallTest
    public void testPrevMonthRollOver() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.JANUARY);

        helper.previousMonth();

        assertEquals(2006, helper.getYear());
        assertEquals(Calendar.DECEMBER, helper.getMonth());
    }

    @SmallTest
    public void testNextMonth() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.AUGUST, Calendar.SUNDAY);

        assertArraysEqual(new int[]{29, 30, 31, 1, 2, 3, 4},
                helper.getDigitsForRow(0));

        helper.nextMonth();

        assertEquals(Calendar.SEPTEMBER, helper.getMonth());
        assertArraysEqual(new int[]{26, 27, 28, 29, 30, 31, 1},
                helper.getDigitsForRow(0));
    }

    @SmallTest
    public void testGetRowOf() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.AUGUST, Calendar.SUNDAY);

        assertEquals(0, helper.getRowOf(2));
        assertEquals(0, helper.getRowOf(4));
        assertEquals(2, helper.getRowOf(12));
        assertEquals(2, helper.getRowOf(18));
        assertEquals(3, helper.getRowOf(19));
    }

    @SmallTest
    public void testGetColumnOf() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.AUGUST, Calendar.SUNDAY);

        assertEquals(3, helper.getColumnOf(1));
        assertEquals(4, helper.getColumnOf(9));
        assertEquals(5, helper.getColumnOf(17));
        assertEquals(6, helper.getColumnOf(25));
        assertEquals(0, helper.getColumnOf(26));
    }

    @SmallTest
    public void testWithinCurrentMonth() {
        MonthDisplayHelper helper = new MonthDisplayHelper(2007,
                Calendar.SEPTEMBER, Calendar.SUNDAY);

        // out of bounds
        assertFalse(helper.isWithinCurrentMonth(-1, 3));
        assertFalse(helper.isWithinCurrentMonth(6, 3));
        assertFalse(helper.isWithinCurrentMonth(2, -1));
        assertFalse(helper.isWithinCurrentMonth(2, 7));

        // last day of previous month
        assertFalse(helper.isWithinCurrentMonth(0, 5));

        // first day of next month
        assertFalse(helper.isWithinCurrentMonth(5, 1));

        // first day in month
        assertTrue(helper.isWithinCurrentMonth(0, 6));

        // last day in month
        assertTrue(helper.isWithinCurrentMonth(5, 0));
    }

    private void assertArraysEqual(int[] expected, int[] actual) {
        assertEquals("array length", expected.length, actual.length);
        for (int i = 0; i < expected.length; i++) {
            assertEquals("index " + i,
                    expected[i], actual[i]);
        }
    }

}