validate input

1 files changed, 6 insertions, 0 deletions

diff --git a/test/problem-6.bats b/test/problem-6.bats
index 9246bca..0c37092 100644
--- a/test/problem-6.bats
+++ b/test/problem-6.bats
@@ -18,3 +18,9 @@ load test_helper
 
   assert_success $'squares: 1 4 9 16 25 36 49 64 81 100\nsum: 55'
 }
+
+@test "invoke with single non-numeric" {
+  run problem-6.sh "oops"
+
+  assert_failure $'error: "oops" is not a number'
+}