From cf503838aef0f898c20fdfc0a692bb20088504a4 Mon Sep 17 00:00:00 2001
From: Eryn Wells <eryn@erynwells.me>
Date: Sat, 25 Aug 2018 20:21:18 -0700
Subject: [PATCH] [parser] Add a single pair test

---
 parser/tests/single_item.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/parser/tests/single_item.rs b/parser/tests/single_item.rs
index 9614a16..ce3984c 100644
--- a/parser/tests/single_item.rs
+++ b/parser/tests/single_item.rs
@@ -11,7 +11,7 @@ extern crate sibiltypes;
 use sibillexer::{Lex, Token};
 use sibillexer::Result as LexerResult;
 use sibilparser::Parser;
-use sibiltypes::{Obj, Sym};
+use sibiltypes::{Obj, Pair, Sym};
 
 #[test]
 fn single_sym() {
@@ -21,3 +21,12 @@ fn single_sym() {
     assert_eq!(parser.next(), Some(Ok(Obj::new(Sym::with_str("abc")))));
     assert_eq!(parser.next(), None);
 }
+
+#[test]
+fn single_pair() {
+    let tokens = vec![Ok(Lex::new(Token::LeftParen, "(", 0, 0)),
+                      Ok(Lex::new(Token::RightParen, ")", 0, 0))].into_iter();
+    let mut parser = Parser::new(tokens);
+    assert_eq!(parser.next(), Some(Ok(Obj::new(Pair::empty()))));
+    assert_eq!(parser.next(), None);
+}