fix have_db_column.with_options misspelled options

have_db_column().with_options() should raise an ArgumentError
if receives a misspelled argument

lib/shoulda/matchers/active_record/have_db_column_matcher.rb

@@ -95,7 +95,8 @@ def of_type(column_type)
         end
 
         def with_options(opts = {})
-          %w(precision limit default null scale primary).each do |attribute|
+          validate_options(opts)
+          OPTIONS.each do |attribute|
             if opts.key?(attribute.to_sym)
               @options[attribute.to_sym] = opts[attribute.to_sym]
             end
@@ -137,6 +138,13 @@ def description
 
         protected
 
+        OPTIONS = %i(precision limit default null scale primary)
+
+        def validate_options(opts)
+          invalid_options = opts.keys.map(&:to_sym) - OPTIONS
+          raise ArgumentError, "Unknown option(s) '#{invalid_options}'" unless invalid_options.empty?
+        end
+
         def column_exists?
           if model_class.column_names.include?(@column.to_s)
             true

spec/unit/shoulda/matchers/active_record/have_db_column_matcher_spec.rb

@@ -98,6 +98,14 @@
     end
   end
 
+  context 'with invalid argument option' do
+    it 'throws an ArgumentError' do
+      expect {
+        have_db_column(:salary).with_options(preccision: 5)
+      }.to raise_error(ArgumentError)
+    end
+  end
+
   def model(options = {})
     define_model(:employee, options).new
   end