public void testGrow() {
CharTermAttributeImpl t = new CharTermAttributeImpl();
StringBuilder buf = new StringBuilder("ab");
for (int i = 0; i < 20; i++) {
char[] content = buf.toString().toCharArray();
t.copyBuffer(content, 0, content.length);
assertEquals(buf.length(), t.length());
assertEquals(buf.toString(), t.toString());
buf.append(buf.toString());
}
assertEquals(1048576, t.length());
// now as a StringBuilder, first variant
t = new CharTermAttributeImpl();
buf = new StringBuilder("ab");
for (int i = 0; i < 20; i++) {
t.setEmpty().append(buf);
assertEquals(buf.length(), t.length());
assertEquals(buf.toString(), t.toString());
buf.append(t);
}
assertEquals(1048576, t.length());
// Test for slow growth to a long term
t = new CharTermAttributeImpl();
buf = new StringBuilder("a");
for (int i = 0; i < 20000; i++) {
t.setEmpty().append(buf);
assertEquals(buf.length(), t.length());
assertEquals(buf.toString(), t.toString());
buf.append("a");
}
assertEquals(20000, t.length());
}
public void testCharSequenceInterface() {
final String s = "0123456789";
final CharTermAttributeImpl t = new CharTermAttributeImpl();
t.append(s);
assertEquals(s.length(), t.length());
assertEquals("12", t.subSequence(1, 3).toString());
assertEquals(s, t.subSequence(0, s.length()).toString());
assertTrue(Pattern.matches("01\\d+", t));
assertTrue(Pattern.matches("34", t.subSequence(3, 5)));
assertEquals(s.subSequence(3, 7).toString(), t.subSequence(3, 7).toString());
for (int i = 0; i < s.length(); i++) {
assertTrue(t.charAt(i) == s.charAt(i));
}
}
