Merge pull request #576 from ricemery/luhn

Update luhn to latest canoncial json. Refs #488

exercises/luhn/src/test/scala/LuhnTest.scala

@@ -1,69 +1,74 @@
 import org.scalatest.{Matchers, FunSuite}
 
-/** @version 1.1.0 */
+/** @version 1.2.0 */
 class LuhnTest extends FunSuite with Matchers {
 
   test("single digit strings can not be valid") {
-    Luhn.valid("1") should be (false)
+    Luhn.valid("1") should be(false)
   }
 
   test("a single zero is invalid") {
     pending
-    Luhn.valid("0") should be (false)
+    Luhn.valid("0") should be(false)
   }
 
   test("a simple valid SIN that remains valid if reversed") {
     pending
-    Luhn.valid("059") should be (true)
+    Luhn.valid("059") should be(true)
   }
 
   test("a simple valid SIN that becomes invalid if reversed") {
     pending
-    Luhn.valid("59") should be (true)
+    Luhn.valid("59") should be(true)
   }
 
   test("a valid Canadian SIN") {
     pending
-    Luhn.valid("055 444 285") should be (true)
+    Luhn.valid("055 444 285") should be(true)
   }
 
   test("invalid Canadian SIN") {
     pending
-    Luhn.valid("055 444 286") should be (false)
+    Luhn.valid("055 444 286") should be(false)
   }
 
   test("invalid credit card") {
     pending
-    Luhn.valid("8273 1232 7352 0569") should be (false)
+    Luhn.valid("8273 1232 7352 0569") should be(false)
   }
 
   test("valid strings with a non-digit included become invalid") {
     pending
-    Luhn.valid("055a 444 285") should be (false)
+    Luhn.valid("055a 444 285") should be(false)
   }
 
   test("valid strings with punctuation included become invalid") {
     pending
-    Luhn.valid("055-444-285") should be (false)
+    Luhn.valid("055-444-285") should be(false)
   }
 
   test("valid strings with symbols included become invalid") {
     pending
-    Luhn.valid("055£ 444$ 285") should be (false)
+    Luhn.valid("055£ 444$ 285") should be(false)
   }
 
   test("single zero with space is invalid") {
     pending
-    Luhn.valid(" 0") should be (false)
+    Luhn.valid(" 0") should be(false)
   }
 
   test("more than a single zero is valid") {
     pending
-    Luhn.valid("0000 0") should be (true)
+    Luhn.valid("0000 0") should be(true)
   }
 
   test("input digit 9 is correctly converted to output digit 9") {
     pending
-    Luhn.valid("091") should be (true)
+    Luhn.valid("091") should be(true)
+  }
+
+  test("strings with non-digits is invalid") {
+    pending
+    Luhn.valid(":9") should be(false)
   }
 }