@Test
void testTokenizeExpression() {

  Loader<String> loader = new StringLoader();
  Reader templateReader = loader.getReader("{{ whatever }}");
  TokenStream tokenStream = this.lexer.tokenize(templateReader, this.TEMPLATE_NAME);
  assertThat(tokenStream.peek(0).getType()).isEqualTo(Type.PRINT_START);
  assertThat(tokenStream.peek(0).getValue()).isNull();
  assertThat(tokenStream.peek(1).getType()).isEqualTo(Type.NAME);
  assertThat(tokenStream.peek(1).getValue()).isEqualTo("whatever");
  assertThat(tokenStream.peek(2).getType()).isEqualTo(Type.PRINT_END);
  assertThat(tokenStream.peek(2).getValue()).isEqualTo("}}");
  assertThat(tokenStream.peek(3).getType()).isEqualTo(Type.EOF);
  assertThat(tokenStream.peek(3).getValue()).isNull();
}