From 796f3691e6966b2d88cd5e475937da7f61a86d26 Mon Sep 17 00:00:00 2001
From: Peter Wu <peter@lekensteyn.nl>
Date: Fri, 29 Apr 2016 15:09:22 +0200
Subject: Implement lexical definition for "ID" (Q1)

    ID ::= [a-z] [a-z0-9]*
---
 src/regex/RegexTest.java | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/regex/RegexTest.java b/src/regex/RegexTest.java
index 097e4f7..335843c 100644
--- a/src/regex/RegexTest.java
+++ b/src/regex/RegexTest.java
@@ -38,10 +38,36 @@ public class RegexTest {
         long dfaMatchTime = dfaMatch(input, index);
         System.out.println("dfaMatchTime " + dfaMatchTime);
     }
+
+    private void check(String input, boolean expectOk) {
+        int length = r.run(input, 0);
+        if (expectOk && length == -1 || !expectOk && length != -1) {
+            throw new RuntimeException("Unexpected result for " + input);
+        }
+    }
+
+    void assertOk(String input) {
+        check(input, true);
+    }
+
+    void assertFail(String input) {
+        check(input, false);
+    }
+
+    static void checkId() {
+        RegexTest reId = new RegexTest("[a-z][a-z0-9]*");
+        reId.assertOk("id");
+        reId.assertOk("d0d");
+        reId.assertFail("Id");
+        reId.assertFail("0");
+        reId.assertFail("0d");
+    }
     
     public static void main(String[] args) {
         RegexTest exampleRegexTest = new RegexTest("aap");
         exampleRegexTest.runTest("aap_df34_d asdf sdfd", 0);
         exampleRegexTest.runTest("a_a_pasdf sdfd", 0);
+
+        checkId();
     }
 }
-- 
cgit v1.2.1