[1ae12987cb] Ensure that deleting the [history] command deletes its storage.

1 files changed, 56 insertions, 2 deletions

diff --git a/tests/history.test b/tests/history.test
index c2d2124..9ff41f2 100644
--- a/tests/history.test
+++ b/tests/history.test
@@ -11,8 +11,8 @@
 # See the file "license.terms" for information on usage and redistribution of
 # this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
-if {[lsearch [namespace children] ::tcltest] == -1} {
-    package require tcltest
+if {"::tcltest" ni [namespace children]} {
+    package require tcltest 2
     namespace import -force ::tcltest::*
 }
 
@@ -245,6 +245,60 @@ test history-9.2 {miscellaneous} history {
     catch {history gorp} msg
     set msg
 } {unknown or ambiguous subcommand "gorp": must be add, change, clear, event, info, keep, nextid, or redo}
+
+# History retains references; Bug 1ae12987cb
+test history-10.1 {references kept by history} -constraints history -setup {
+    interp create histtest
+    histtest eval {
+	# Trigger any autoloading that might be present
+	catch {history}
+	proc refcount {x} {
+	    set rep [::tcl::unsupported::representation $x]
+	    regexp {with a refcount of (\d+)} $rep -> rc
+	    # Ignore the references due to calling this procedure
+	    return [expr {$rc - 3}]
+	}
+    }
+} -body {
+    histtest eval {
+	# A fresh object, refcount 1 from the variable we write it to
+	set obj [expr rand()]
+	set baseline [refcount $obj]
+	lappend result [refcount $obj]
+	history add [list list $obj]
+	lappend result [refcount $obj]
+	history clear
+	lappend result [refcount $obj]
+    }
+} -cleanup {
+    interp delete histtest
+} -result {1 2 1}
+test history-10.2 {references kept by history} -constraints history -setup {
+    interp create histtest
+    histtest eval {
+	# Trigger any autoloading that might be present
+	catch {history}
+	proc refcount {x} {
+	    set rep [::tcl::unsupported::representation $x]
+	    regexp {with a refcount of (\d+)} $rep -> rc
+	    # Ignore the references due to calling this procedure
+	    return [expr {$rc - 3}]
+	}
+    }
+} -body {
+    histtest eval {
+	# A fresh object, refcount 1 from the variable we write it to
+	set obj [expr rand()]
+	set baseline [refcount $obj]
+	lappend result [refcount $obj]
+	history add [list list $obj]
+	lappend result [refcount $obj]
+	rename history {}
+	lappend result [refcount $obj]
+    }
+} -cleanup {
+    interp delete histtest
+} -result {1 2 1}
 
 # cleanup
 ::tcltest::cleanupTests