@Test
public void shouldPushTokenAtBegining() {
Token pushedToken = new Token("push", 1, 0);
List<Token> pushedTokenList = new ArrayList<>();
pushedTokenList.add(pushedToken);
tokenQueue.pushForward(pushedTokenList);
assertThat(tokenQueue.peek(), is(pushedToken));
assertThat(tokenQueue.size(), is(4));
}
@Test(expected = IllegalStateException.class)
public void shouldThrowAnException() {
TokenMatcher tokenMatcher = mock(TokenMatcher.class);
StatementChannel channel = StatementChannel.create(tokenMatcher);
StatementChannelDisptacher dispatcher = new StatementChannelDisptacher(Arrays.asList(channel));
TokenQueue tokenQueue = mock(TokenQueue.class);
when(tokenQueue.peek()).thenReturn(new Token("a", 1, 0)).thenReturn(null);
List<Statement> statements = mock(List.class);
dispatcher.consume(tokenQueue, statements);
}
@Test
public void shouldConsume() {
TokenMatcher tokenMatcher = mock(TokenMatcher.class);
when(tokenMatcher.matchToken(any(TokenQueue.class), anyListOf(Token.class))).thenReturn(true);
StatementChannel channel = StatementChannel.create(tokenMatcher);
StatementChannelDisptacher dispatcher = new StatementChannelDisptacher(Arrays.asList(channel));
TokenQueue tokenQueue = mock(TokenQueue.class);
when(tokenQueue.peek()).thenReturn(new Token("a", 1, 0)).thenReturn(null);
List<Statement> statements = mock(List.class);
assertThat(dispatcher.consume(tokenQueue, statements), is(true));
verify(tokenQueue, times(2)).peek();
verifyNoMoreInteractions(tokenQueue);
verifyNoMoreInteractions(statements);
}
@Test
public void shouldPollToken() {
Token token = tokenQueue.poll();
assertThat(token, is(new Token("a", 1, 0)));
assertThat(tokenQueue.size(), is(2));
}
@Test
public void shouldPeekToken() {
Token token = tokenQueue.peek();
assertThat(token, is(new Token("a", 1, 0)));
assertThat(tokenQueue.size(), is(3));
}