[parser] Integration test of parsing a single Sym!

parser/src/lib.rs

@@ -20,7 +20,7 @@ use program_parser::ProgramParser;
 /// The output of calling `parse()` on a Parser is one of these Result objects.
 pub type Result = std::result::Result<Obj, ParseError>;
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub enum ParseError {
     LexerError{msg: String},
     ParserError{msg: String}

parser/tests/single_item.rs

@@ -0,0 +1,23 @@
+/* parser/tests/single_item.rs
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+//! Tests that the parser can handle inputs of single tokens.
+
+extern crate sibillexer;
+extern crate sibilparser;
+extern crate sibiltypes;
+
+use sibillexer::{Lex, Token};
+use sibillexer::Result as LexerResult;
+use sibilparser::Parser;
+use sibiltypes::{Obj, Sym};
+
+#[test]
+fn single_sym() {
+    let lex: LexerResult = Ok(Lex::new(Token::Id, "abc", 0, 0));
+    let tokens = vec![lex].into_iter();
+    let mut parser = Parser::new(tokens);
+    assert_eq!(parser.next(), Some(Ok(Obj::new(Sym::with_str("abc")))));
+    assert_eq!(parser.next(), None);
+}