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Groovy example source code file (EmptyRangeTest.java)

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

Java - Groovy tags/keywords

arraylist, arraylist, at, at, emptyrange, indexoutofboundsexception, integer, integer, iterator, list, listiterator, range, unsupportedoperationexception, unsupportedoperationexception, util

The Groovy EmptyRangeTest.java source code

/**
 *
 */
package groovy.lang;

import groovy.util.GroovyTestCase;

import java.util.*;

/**
 * Provides unit tests for the {@link EmptyRange} class.
 *
 * @author Edwin Tellman
 */
public class EmptyRangeTest extends GroovyTestCase {

    /**
     * The 'from' value for the {@link Range}.
     */
    private static final Integer AT = new Integer(17);

    /**
     * The {@link Range} to test.
     */
    private Range range = null;

    /**
     * {@inheritDoc}
     */
    protected void setUp() throws Exception {
        super.setUp();

        range = new EmptyRange(AT);
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#getFrom()}.
     */
    public void testGetFrom() {
        assertEquals("wrong 'from' value", AT, range.getFrom());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#getTo()}.
     */
    public void testGetTo() {
        assertEquals("wrong 'from' value", AT, range.getTo());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#isReverse()}.
     */
    public void testIsReverse() {
        assertFalse("empty range reversed", range.isReverse());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#inspect()}.
     */
    public void testInspect() {
        assertEquals("wrong 'inspect' value", AT + "..<" + AT, range.inspect());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#inspect()()} with a range with a <code>null 'at' value.
     */
    public void testInspectNullAt() {
        final Range nullAtRange = new EmptyRange(null);
        assertEquals("wrong inspect value", "null..<null", nullAtRange.inspect());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#toString()}.
     */
    public void testToString() {
        assertEquals("wrong string value", AT + "..<" + AT, range.toString());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#toString()} with a range with a <code>null 'at' value.
     */
    public void testToStringNullAt() {
        final Range nullAtRange = new EmptyRange(null);
        assertEquals("wrong string value", "null..<null", nullAtRange.toString());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#size()}.
     */
    public void testSize() {
        assertEquals("wrong size", 0, range.size());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#clear()}.
     */
    public void testClear() {
        range.clear();
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#isEmpty()}.
     */
    public void testIsEmpty() {
        assertTrue("range not empty", range.isEmpty());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#toArray()}.
     */
    public void testToArray() {
        assertArrayEquals(new Object[0], range.toArray());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#get(int)}.
     */
    public void testGet() {
        try {
            range.get(0);
            fail("got value from empty range");
        }
        catch (IndexOutOfBoundsException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#remove(int)}.
     */
    public void testRemoveInt() {
        try {
            range.remove(0);
            fail("removed value from empty range");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#add(int,java.lang.Object)}.
     */
    public void testAddIntObject() {
        try {
            range.add(0, new Integer(12));
            fail("added value to empty range");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#indexOf(java.lang.Object)}.
     */
    public void testIndexOf() {
        assertEquals("found value in empty range", -1, range.indexOf(AT));
        assertEquals("found null in empty range", -1, range.indexOf(null));
        assertEquals("found string in empty range", -1, range.indexOf("hello"));
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#lastIndexOf(java.lang.Object)}.
     */
    public void testLastIndexOf() {
        assertEquals("found value in empty range", -1, range.lastIndexOf(AT));
        assertEquals("found null in empty range", -1, range.lastIndexOf(null));
        assertEquals("found string in empty range", -1, range.lastIndexOf("hello"));
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#add(java.lang.Object)}.
     */
    public void testAddObject() {
        try {
            range.add(new Integer(12));
            fail("added value to empty range");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#contains(java.lang.Object)}.
     */
    public void testContains() {
        assertFalse("empty range contains a value", range.contains(AT));
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#remove(java.lang.Object)}.
     */
    public void testRemoveObject() {
        try {
            range.remove(AT);
            fail("removed value from empty range");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#addAll(int,java.util.Collection)}.
     */
    public void testAddAllIntCollection() {
        try {
            range.addAll(0, new ArrayList());
            fail("added values to empty range");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#addAll(java.util.Collection)}.
     */
    public void testAddAllCollection() {
        try {
            range.addAll(new ArrayList());
            fail("added values to empty range");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#containsAll(java.util.Collection)}.
     */
    public void testContainsAll() {
        final List list = new ArrayList();
        assertTrue("range contains all elements of an empty list", range.containsAll(list));

        list.add(AT);
        assertFalse("range contains all elements of single element list", range.containsAll(list));
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#removeAll(java.util.Collection)}.
     */
    public void testRemoveAll() {
        try {
            range.removeAll(new ArrayList());
            fail("removed values from an empty range");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#retainAll(java.util.Collection)}.
     */
    public void testRetainAll() {
        try {
            range.retainAll(new ArrayList());
            fail("retained values in an empty range");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#iterator()}.
     */
    public void testIterator() {
        final Iterator iterator = range.iterator();
        assertFalse("iterator has next value", iterator.hasNext());

        try {
            iterator.next();
            fail("got next value in an empty range");
        }
        catch (NoSuchElementException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Tests removing via an iterator.
     */
    public void testIteratorRemove() {
        try {
            final Iterator iterator = range.iterator();
            iterator.remove();
            fail("removed via iterator");
        }
        catch (IllegalStateException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#subList(int,int)}.
     */
    public void testSubList() {
        final List list = range.subList(0, 0);
        assertTrue("list not empty", list.isEmpty());
        try {
            range.subList(0, 1);
            fail("got sub list in an empty range");
        }
        catch (IndexOutOfBoundsException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#listIterator()}.
     */
    public void testListIterator() {
        final ListIterator iterator = range.listIterator();
        assertFalse("iterator has next value", iterator.hasNext());
        assertFalse("iterator has previous value", iterator.hasPrevious());

        try {
            iterator.next();
            fail("got next value in an empty range");
        }
        catch (NoSuchElementException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#listIterator(int)}.
     */
    public void testListIteratorInt() {
        final ListIterator iterator = range.listIterator(0);
        assertFalse("iterator has next value", iterator.hasNext());
        assertFalse("iterator has previous value", iterator.hasPrevious());

        try {
            range.listIterator(1);
            fail("got list iterator at index 1");
        }
        catch (IndexOutOfBoundsException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#set(int,java.lang.Object)}.
     */
    public void testSet() {
        try {
            range.set(0, AT);
            fail("got set value 0");
        }
        catch (UnsupportedOperationException e) {
            assertTrue("expected exception thrown", true);
        }
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#toArray(java.lang.Object[])}.
     */
    public void testToArrayObjectArray() {
        final Integer[] actual = (Integer[]) range.toArray(new Integer[0]);
        assertArrayEquals(new Integer[0], actual);
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#step(int,groovy.lang.Closure)}.
     */
    public void testStepIntClosure() {
        final List callLog = new ArrayList();
        final Closure closure = new NumberRangeTest.RecordingClosure(callLog);
        range.step(1, closure);
        assertEquals("wrong number of calls to closure", 0, callLog.size());
    }

    /**
     * Test method for {@link groovy.lang.EmptyRange#step(int)}.
     */
    public void testStepInt() {
        List result = range.step(1);
        assertTrue("too many elements", result.isEmpty());

        // make sure a new list is returned each time
        result.add(new Integer(1));
        result = range.step(1);
        assertTrue("too many elements", result.isEmpty());
    }
}

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