+ (test-utf7-decode-string-plus): New testcase.
+ (test-utf7-decode-string-noconv): Ditto.
+ (test-utf7-encode-string-plus): Ditto.
+ (test-utf7-encode-string-noconv): Ditto.
+ (test-utf7-decode-string-nihongo): Rename from
+ `test-utf7-decode-string'. Use `make-char'.
+ (test-utf7-encode-string-nihongo): Rename from
+ `test-utf7-encode-string'. Use `make-char'.
+ (test-utf7-decode-string-alpha): New testcase.
+ (test-utf7-encode-string-alpha): Ditto.
+ (test-utf7-decode-string-smiling-face): Ditto.
+ (test-utf7-encode-string-smiling-face): Ditto.