@Test
public void writeTest() {
t.writeCharacter('c');
assertEquals('c', t.readCharacter());
t.moveRight();
t.writeCharacter('c');
assertEquals('c', t.readCharacter());
t.moveRight();
t.writeCharacter('c');
assertEquals('c', t.readCharacter());
}
@Test
public void moveTest() {
assertEquals("first character is wrong:", 'a', t.readCharacter());
t.moveLeft();
assertEquals("after moving to the left, there should be a blank:", blank, t.readCharacter());
t.moveRight();
t.moveRight();
assertEquals('b', t.readCharacter());
t.moveRight();
assertEquals('c', t.readCharacter());
t.moveRight();
assertEquals(blank, t.readCharacter());
t.moveRight();
assertEquals(blank, t.readCharacter());
t.moveLeft();
t.moveLeft();
assertEquals('c', t.readCharacter());
}