Fix booleans without validate_type with arguments

If we're not using `validate_type`, we shouldn't try to check a boolean
flag's argument to check if it's valid (actually, we probably shouldn't
even do that WITH using `validate_type`, but that's a separate issue).

For now, this will prevent broken boolean flags.

Fixes #279

1 files changed, 7 insertions, 0 deletions

diff --git a/test/types_test.rb b/test/types_test.rb
index c6f0864..05e6265 100644
--- a/test/types_test.rb
+++ b/test/types_test.rb
@@ -66,6 +66,13 @@ describe Slop::BoolOption do
       @result.parser.parse %w(--verbose foo)
     end
   end
+
+  # Like above but without validate_type
+  it "returns true if used and ignores the value" do
+    @result.parser.parse %w(--quiet foo)
+
+    assert_equal true, @result[:quiet]
+  end
 end
 
 describe Slop::IntegerOption do