/**
* this method will test the getBytes method of the stack
*
* @throws StackException
*/
@Test
public void testGetBytes() throws StackException {
{ // valid read
StackSegment stack = createStack(10, 0);
stack.setBytes(0, new byte[] {0x11, 0x10, 0x21, 0x20});
assertEquals(0x11, stack.getBytes(0, 4)[0]);
assertEquals(0x10, stack.getBytes(0, 4)[1]);
assertEquals(0x21, stack.getBytes(0, 4)[2]);
assertEquals(0x20, stack.getBytes(0, 4)[3]);
}
{ // invalid read (invalid at start of read)
StackSegment stack = createStack(10, 0);
stack.setBytes(2, new byte[] {0x11, 0x20, 0x30, 0x40});
assertEquals(6, stack.size());
try {
stack.getBytes(8, 4);
fail(); // fail test if no exception thrown
} catch (StackException e) {
assertTrue(
e.getMessage()
.equals("Invalid read on stack.")); // if exception properly thrown (checks correct
// exception)
}
}
{ // invalid read 2 (invalid half way through read)
StackSegment stack = createStack(10, 0);
stack.setBytes(2, new byte[] {0x11, 0x20, 0x30, 0x40});
assertEquals(6, stack.size());
try {
stack.getBytes(4, 4);
fail(); // fail test if no exception thrown
} catch (StackException e) {
assertTrue(e.getMessage().equals("Invalid read on stack.")); // if exception properly thrown
}
}
}
/**
* method will test the set bytes method of the stack segment
*
* @throws StackException
*/
@Test
public void testSetBytes() throws StackException {
{ // valid write (no growth of stack)
StackSegment stack = createStack(10, 0);
assertEquals(4, stack.size());
stack.setBytes(0, new byte[] {0x11, 0x10, 0x11, 0x10});
assertEquals(4, stack.size());
assertEquals(0x11, stack.getBytes(0, 4)[0]);
assertEquals(0x10, stack.getBytes(0, 4)[1]);
assertEquals(0x11, stack.getBytes(0, 4)[2]);
assertEquals(0x10, stack.getBytes(0, 4)[3]);
}
{ // valid write (growth of stack)
StackSegment stack = createStack(10, 0);
assertEquals(4, stack.size());
stack.setBytes(2, new byte[] {0x00, 0x11, 0x10, 0x01});
assertEquals(6, stack.size());
assertEquals(0x00, stack.getBytes(2, 4)[0]);
assertEquals(0x11, stack.getBytes(2, 4)[1]);
assertEquals(0x10, stack.getBytes(2, 4)[2]);
assertEquals(0x01, stack.getBytes(2, 4)[3]);
}
{ // valid write (outside force growth)
StackSegment stack = createStack(10, 0);
assertEquals(4, stack.size());
try {
stack.setBytes(5, new byte[] {0x11, 0x10});
fail();
} catch (StackException e) {
assertTrue(e.getMessage().equals("Invalid write onto stack."));
}
}
{ // stack overflow test
StackSegment stack = createStack(10, 0);
assertEquals(4, stack.size());
try {
stack.setBytes(
0, new byte[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00});
fail();
} catch (Exception e) {
assertTrue(e.getMessage().equals("Stack overflow."));
}
}
{ // stack overflow test 2 (in more stages)
StackSegment stack = createStack(10, 0);
assertEquals(4, stack.size());
try {
stack.setBytes(0, new byte[] {0x00, 0x00, 0x00, 0x00, 0x00});
stack.setBytes(5, new byte[] {0x00, 0x00, 0x00, 0x00, 0x00});
stack.setBytes(10, new byte[] {0x00});
fail();
} catch (Exception e) {
assertTrue(e.getMessage().equals("Stack overflow."));
}
}
}
/** tests set up of stack is correct it also tests size works but this is trivial */
@Test
public void testInitialStack() {
StackSegment stack = createStack(10, 0);
assertEquals(4, stack.size());
}