From 38e82ade6fd207af21f2df6a3e98298338e85eb8 Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com>
Date: Wed, 12 Jul 2017 22:54:33 -0400
Subject: Lex basic dice

---
 __tests__/lexer.test.js | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 __tests__/lexer.test.js

(limited to '__tests__')

diff --git a/__tests__/lexer.test.js b/__tests__/lexer.test.js
new file mode 100644
index 0000000..20d461f
--- /dev/null
+++ b/__tests__/lexer.test.js
@@ -0,0 +1,29 @@
+const { lex } = require('../src/lexer.js')
+
+describe('lex', () => {
+  it('lexes the empty string', () => {
+    expect(lex('')).toEqual([])
+  })
+
+  it('signals an error on unexpected input', () => {
+    expect(lex('q')).toBe('error')
+  })
+
+  describe('basic dice', () => {
+    it('1d6', () => {
+      expect(lex('1d6')).toEqual([
+        { type: 'number', value: 1 },
+        { type: 'd' },
+        { type: 'number', value: 6 }
+      ])
+    })
+
+    it('42d172', () => {
+      expect(lex('42d172')).toEqual([
+        { type: 'number', value: 42 },
+        { type: 'd' },
+        { type: 'number', value: 172 }
+      ])
+    })
+  })
+})
-- 
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