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+# Commands covered:  concat
+#
+# This file contains a collection of tests for one or more of the Tcl
+# built-in commands.  Sourcing this file into Tcl runs the tests and
+# generates output for errors.  No output means no errors were found.
+#
+# Copyright (c) 1991-1993 The Regents of the University of California.
+# Copyright (c) 1994-1996 Sun Microsystems, Inc.
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+#
+# SCCS: @(#) concat.test 1.10 96/12/20 18:53:31
+
+if {[string compare test [info procs test]] == 1} then {source defs}
+
+test concat-1.1 {simple concatenation} {
+    concat a b c d e f g
+} {a b c d e f g}
+test concat-1.2 {merging lists together} {
+    concat a {b c d} {e f g h}
+} {a b c d e f g h}
+test concat-1.3 {merge lists, retain sub-lists} {
+    concat a {b {c d}} {{e f}} g h
+} {a b {c d} {e f} g h}
+test concat-1.4 {special characters} {
+    concat a\{ {b \{c d} \{d
+} "a{ b \\{c d {d"
+
+test concat-2.1 {error: one empty argument} {
+    concat {}
+} {}
+
+test concat-3.1 {error: no arguments} {
+    list [catch concat msg] $msg
+} {0 {}}
+
+test concat-4.1 {pruning off extra white space} {
+    concat {} {a b c}
+} {a b c}
+test concat-4.2 {pruning off extra white space} {
+    concat x y "  a b c	\n\t  " "   "  " def "
+} {x y a b c def}
+test concat-4.3 {pruning off extra white space sets length correctly} {
+    llength [concat { {{a}} }]
+} 1