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+# Commands covered:  none
+#
+# This file contains a collection of tests for Tcl_AsyncCreate and related
+# library procedures.  Sourcing this file into Tcl runs the tests and
+# generates output for errors.  No output means no errors were found.
+#
+# Copyright (c) 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: @(#) async.test 1.5 96/04/05 15:29:38
+
+if {[info commands testasync] == {}} {
+    puts "This application hasn't been compiled with the \"testasync\""
+    puts "command, so I can't test Tcl_AsyncCreate et al."
+    return
+}
+
+if {[string compare test [info procs test]] == 1} then {source defs}
+
+proc async1 {result code} {
+    global aresult acode
+    set aresult $result
+    set acode $code
+    return "new result"
+}
+proc async2 {result code} {
+    global aresult acode
+    set aresult $result
+    set acode $code
+    return -code error "xyzzy"
+}
+proc async3 {result code} {
+    global aresult
+    set aresult "test pattern"
+    return -code $code $result
+}
+
+set handler1 [testasync create async1]
+set handler2 [testasync create async2]
+set handler3 [testasync create async3]
+test async-1.1 {basic async handlers} {
+    set aresult xxx
+    set acode yyy
+    list [catch {testasync mark $handler1 "original" 0} msg] $msg \
+	   $acode $aresult
+} {0 {new result} 0 original}
+test async-1.2 {basic async handlers} {
+    set aresult xxx
+    set acode yyy
+    list [catch {testasync mark $handler1 "original" 1} msg] $msg \
+	   $acode $aresult
+} {0 {new result} 1 original}
+test async-1.3 {basic async handlers} {
+    set aresult xxx
+    set acode yyy
+    list [catch {testasync mark $handler2 "old" 0} msg] $msg \
+	   $acode $aresult
+} {1 xyzzy 0 old}
+test async-1.4 {basic async handlers} {
+    set aresult xxx
+    set acode yyy
+    list [catch {testasync mark $handler2 "old" 3} msg] $msg \
+	   $acode $aresult
+} {1 xyzzy 3 old}
+test async-1.5 {basic async handlers} {
+    set aresult xxx
+    list [catch {testasync mark $handler3 "foobar" 0} msg] $msg $aresult
+} {0 foobar {test pattern}}
+test async-1.6 {basic async handlers} {
+    set aresult xxx
+    list [catch {testasync mark $handler3 "foobar" 1} msg] $msg $aresult
+} {1 foobar {test pattern}}
+
+proc mult1 {result code} {
+    global x
+    lappend x mult1
+    return -code 7 mult1
+}
+set hm1 [testasync create mult1]
+proc mult2 {result code} {
+    global x
+    lappend x mult2
+    return -code 9 mult2
+}
+set hm2 [testasync create mult2]
+proc mult3 {result code} {
+    global x hm1 hm2
+    lappend x [catch {testasync mark $hm2 serial2 0}]
+    lappend x [catch {testasync mark $hm1 serial1 0}]
+    lappend x mult3
+    return -code 11 mult3
+}
+set hm3 [testasync create mult3]
+
+test async-2.1 {multiple handlers} {
+    set x {}
+    list [catch {testasync mark $hm3 "foobar" 5} msg] $msg $x
+} {9 mult2 {0 0 mult3 mult1 mult2}}
+
+proc del1 {result code} {
+    global x hm1 hm2 hm3 hm4
+    lappend x [catch {testasync mark $hm3 serial2 0}]
+    lappend x [catch {testasync mark $hm1 serial1 0}]
+    lappend x [catch {testasync mark $hm4 serial1 0}]
+    testasync delete $hm1
+    testasync delete $hm2
+    testasync delete $hm3
+    lappend x del1
+    return -code 13 del1
+}
+proc del2 {result code} {
+    global x
+    lappend x del2
+    return -code 3 del2
+}
+testasync delete $handler1
+testasync delete $hm2
+testasync delete $hm3
+set hm2 [testasync create del1]
+set hm3 [testasync create mult2]
+set hm4 [testasync create del2]
+
+test async-3.1 {deleting handlers} {
+    set x {}
+    list [catch {testasync mark $hm2 "foobar" 5} msg] $msg $x
+} {3 del2 {0 0 0 del1 del2}}
+
+testasync delete