- assert_equal false, UTF8.valid?("\xC0") # always invalid utf8
- assert_equal false, UTF8.valid?("\xC2\x4a") # 2-byte multibyte identifier, followed by plain ASCII
- assert_equal false, UTF8.valid?("\xC2\xC2") # 2-byte multibyte identifier, followed by another one
- assert_equal false, UTF8.valid?("\x4a\x82") # plain ASCII, followed by multibyte continuation
- assert_equal false, UTF8.valid?("\x82\x82") # multibyte continuations without multibyte identifier
- assert_equal false, UTF8.valid?("\xe1\x82\x4a") # three-byte identifier, contination and (incorrectly) plain ASCII
+ assert_not UTF8.valid?("\xC0") # always invalid utf8
+ assert_not UTF8.valid?("\xC2\x4a") # 2-byte multibyte identifier, followed by plain ASCII
+ assert_not UTF8.valid?("\xC2\xC2") # 2-byte multibyte identifier, followed by another one
+ assert_not UTF8.valid?("\x4a\x82") # plain ASCII, followed by multibyte continuation
+ assert_not UTF8.valid?("\x82\x82") # multibyte continuations without multibyte identifier
+ assert_not UTF8.valid?("\xe1\x82\x4a") # three-byte identifier, continuation and (incorrectly) plain ASCII