From 08e3516ad9c84d340d183890e48499220c17cba5 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Sat, 4 Sep 2021 22:33:29 -0400
Subject: [PATCH] Add wikipedia LR(0) parser example test

---
 spec/imbecile_spec.rb | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/spec/imbecile_spec.rb b/spec/imbecile_spec.rb
index 0bfa784..863590b 100644
--- a/spec/imbecile_spec.rb
+++ b/spec/imbecile_spec.rb
@@ -42,4 +42,26 @@ EOF
     compile("spec/test_d_lexer.d")
     run
   end
+
+  it "generates a parser" do
+    write_grammar <<EOF
+token plus \\+
+token times \\*
+token zero 0
+token one 1
+Start: [E] <<
+>>
+E: [E times B] <<
+>>
+E: [E plus B] <<
+>>
+E: [B] <<
+>>
+B: [zero] <<
+>>
+B: [one] <<
+>>
+EOF
+    build_parser
+  end
 end