diff -r 5e489c9fe47b -r b5f3e814a710 marking4/re1d_test.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/marking4/re1d_test.scala	Fri Nov 30 14:13:11 2018 +0000
@@ -0,0 +1,19 @@
+
+import CW8a._
+
+val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))
+
+assert(ders(("a" * 5).toList, EVIL_urban) == SEQ(SEQ(STAR(CHAR('a')),STAR(STAR(CHAR('a')))),CHAR('b')))
+assert(ders(List('b'), EVIL_urban) == ONE)
+assert(ders(List('b','b'), EVIL_urban) == ZERO)
+assert(matcher(EVIL_urban, "a" * 5 ++ "b") == true)
+assert(matcher(EVIL_urban, "a" * 500 ++ "b") == true)
+assert(matcher(EVIL_urban, "a" * 500) == false)
+assert(matcher(EVIL_urban, "b") == true)
+assert(matcher(EVIL_urban, "bb") == false)
+assert(matcher("abc", "abc") == true)
+assert(matcher(("ab" | "a") ~ (ONE | "bc"), "abc") == true)
+assert(matcher(ONE, "") == true)
+assert(matcher(ZERO, "") == false)
+assert(matcher(ONE | CHAR('a'), "") == true)
+assert(matcher(ONE | CHAR('a'), "a") == true)