--- /dev/null
+;;;; miscellaneous tests of STRING-related stuff
+
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; While most of SBCL is derived from the CMU CL system, the test
+;;;; files (like this one) were written from scratch after the fork
+;;;; from CMU CL.
+;;;;
+;;;; This software is in the public domain and is provided with
+;;;; absolutely no warranty. See the COPYING and CREDITS files for
+;;;; more information.
+
+(in-package "CL-USER")
+
+(assert (string= (string-upcase "This is a test.") "THIS IS A TEST."))
+(assert (string= (string-downcase "This is a test.") "this is a test."))
+(assert (string= (string-capitalize "This is a test.") "This Is A Test."))
+(assert (string= (string-upcase "Is this 900-Sex-hott, please?" :start 3)
+ "Is THIS 900-SEX-HOTT, PLEASE?"))
+(assert (string= (string-downcase "Is this 900-Sex-hott, please?"
+ :start 10 :end 16)
+ "Is this 900-sex-hott, please?"))
+(assert (string= (string-capitalize "Is this 900-Sex-hott, please?")
+ "Is This 900-Sex-Hott, Please?"))