--- /dev/null
+require File.expand_path(File.join(File.dirname(__FILE__), 'test_helper'))
+
+class ValidationTest < Test::Unit::TestCase
+ def test_should_invalidate_big_files
+ @attachment = SmallAttachment.new
+ assert !@attachment.valid?
+ assert @attachment.errors.on(:size)
+
+ @attachment.size = 2000
+ assert !@attachment.valid?
+ assert @attachment.errors.on(:size), @attachment.errors.full_messages.to_sentence
+
+ @attachment.size = 1000
+ assert !@attachment.valid?
+ assert_nil @attachment.errors.on(:size)
+ end
+
+ def test_should_invalidate_small_files
+ @attachment = BigAttachment.new
+ assert !@attachment.valid?
+ assert @attachment.errors.on(:size)
+
+ @attachment.size = 2000
+ assert !@attachment.valid?
+ assert @attachment.errors.on(:size), @attachment.errors.full_messages.to_sentence
+
+ @attachment.size = 1.megabyte
+ assert !@attachment.valid?
+ assert_nil @attachment.errors.on(:size)
+ end
+
+ def test_should_validate_content_type
+ @attachment = PdfAttachment.new
+ assert !@attachment.valid?
+ assert @attachment.errors.on(:content_type)
+
+ @attachment.content_type = 'foo'
+ assert !@attachment.valid?
+ assert @attachment.errors.on(:content_type)
+
+ @attachment.content_type = 'pdf'
+ assert !@attachment.valid?
+ assert_nil @attachment.errors.on(:content_type)
+ end
+
+ def test_should_require_filename
+ @attachment = Attachment.new
+ assert !@attachment.valid?
+ assert @attachment.errors.on(:filename)
+
+ @attachment.filename = 'foo'
+ assert !@attachment.valid?
+ assert_nil @attachment.errors.on(:filename)
+ end
+end
\ No newline at end of file