@Test
public void testNext() {
boolean expected = true;
EasyMock.expect(peekIterator.hasNext()).andReturn(expected).times(4);
String defaultString = "S1";
String resString = "S2";
EasyMock.expect(peekIterator.next()).andReturn(defaultString);
EasyMock.expect(binaryFn.apply(EasyMock.eq(defaultString), EasyMock.isNull()))
.andReturn(resString);
EasyMock.expect(peekIterator.next()).andReturn(defaultString);
EasyMock.expect(comparator.compare(EasyMock.eq(resString), EasyMock.eq(defaultString)))
.andReturn(0);
EasyMock.expect(peekIterator.next()).andReturn(defaultString);
EasyMock.expect(binaryFn.apply(EasyMock.eq(resString), EasyMock.eq(defaultString)))
.andReturn(resString);
EasyMock.expect(comparator.compare(EasyMock.eq(resString), EasyMock.eq(defaultString)))
.andReturn(1);
EasyMock.replay(peekIterator);
EasyMock.replay(binaryFn);
EasyMock.replay(comparator);
String actual = testingIterator.next();
Assert.assertEquals(resString, actual);
EasyMock.verify(peekIterator);
EasyMock.verify(comparator);
EasyMock.verify(binaryFn);
}
@Before
public void setUp() {
peekIterator = EasyMock.createMock(PeekingIterator.class);
comparator = EasyMock.createMock(Comparator.class);
binaryFn = EasyMock.createMock(BinaryFn.class);
testingIterator = CombiningIterator.create(peekIterator, comparator, binaryFn);
}
@Test(expected = NoSuchElementException.class)
public void testExceptionInNext() throws Exception {
boolean expected = false;
EasyMock.expect(peekIterator.hasNext()).andReturn(expected);
EasyMock.replay(peekIterator);
testingIterator.next();
EasyMock.verify(peekIterator);
}
@Test
public void testHasNext() {
boolean expected = true;
EasyMock.expect(peekIterator.hasNext()).andReturn(expected);
EasyMock.replay(peekIterator);
boolean actual = testingIterator.hasNext();
EasyMock.verify(peekIterator);
Assert.assertEquals("The hasNext function is broken", expected, actual);
}
@Test
public void testFalseBranchNext() {
boolean expected = true;
EasyMock.expect(peekIterator.hasNext()).andReturn(expected);
expected = false;
EasyMock.expect(peekIterator.hasNext()).andReturn(expected);
EasyMock.replay(peekIterator);
Object res = testingIterator.next();
EasyMock.verify(peekIterator);
Assert.assertNull("Should be null", res);
}
@Test(expected = UnsupportedOperationException.class)
public void testRemove() throws Exception {
testingIterator.remove();
}
