refactor exceptions to be less verbose

1 files changed, 4 insertions, 2 deletions

diff --git a/tests/string.scm b/tests/string.scm
index d3ab241..7625acc 100644
--- a/tests/string.scm
+++ b/tests/string.scm
@@ -20,8 +20,10 @@
   (test-group "empty-string"
     (test-assert "iterator-at-start?" (iterator-at-start? itr))
     (test-assert "iterator-at-end?" (iterator-at-end? itr))
-    (test-assert "iterator-advance 1" (not (iterator-advance itr 1)))
-    (test-assert "iterator-advance -1" (not (iterator-advance itr -1)))
+    (test-assert "iterator-next" (not (iterator-next itr)))
+    (test-assert "iterator-prev" (not (iterator-next itr)))
+    (test-assert "iterator-advance 0" (iterator=? itr
+                                                  (iterator-advance itr 0)))
     (test "iterator->index" 0 (iterator->index itr))
     (test-assert "iterator=?" (iterator=? itr (string-iterator-end str)))
     (test-error "iterator-ref" (iterator-ref itr))))