config: reject negative float for client_expire_ratio

Negative ratio makes little sense and there's no reason to
allow it.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/yahns/config.rb b/lib/yahns/config.rb
index 88af2de..c923434 100644
--- a/lib/yahns/config.rb
+++ b/lib/yahns/config.rb
@@ -278,7 +278,8 @@ class Yahns::Config # :nodoc:
     var = _check_in_block(nil, :client_expire_threshold)
     case val
     when Float
-      val <= 1.0 or raise ArgumentError, "#{var} must be <= 1.0 if a ratio"
+      (val > 0 && val <= 1.0) or
+        raise ArgumentError, "#{var} must be > 0 and <= 1.0 if a ratio"
     when Integer
     else
       raise ArgumentError, "#{var} must be a float or integer"