3 files changed, 69 insertions, 1 deletions
diff --git a/tests/grid.test b/tests/grid.test
index cba69db..cc445e3 100644
--- a/tests/grid.test
+++ b/tests/grid.test
@@ -80,6 +80,7 @@ test grid-1.9 {basic argument checking} -body {
     grid_reset 1.9
 } -returnCodes ok -result {}
 
+
 test grid-2.1 {bbox} -body {
     grid bbox .
 } -result {0 0 0 0}
@@ -192,6 +193,31 @@ test grid-3.9 {configure: basic argument checking} -body {
 } -cleanup {
     grid_reset 3.9
 } -returnCodes error -result {invalid window shortcut, "y" should be '-', 'x', or '^'}
+test grid-3.10 {configure: basic argument checking} -body {
+    frame .f
+    grid .f -in .f
+} -cleanup {
+    grid_reset 3.10
+} -returnCodes error -result {window can't be managed in itself}
+test grid-3.11 {configure: basic argument checking} -body {
+    frame .f1
+    frame .f2
+    grid .f1 -in .f2
+    grid .f2 -in .f1
+    update
+} -cleanup {
+    grid_reset 3.11
+} -returnCodes error -result {can't put .f2 inside .f1, would cause management loop}
+test grid-3.12 {configure: basic argument checking} -body {
+    frame .f1
+    frame .f2
+    frame .f3
+    grid .f1 -in .f2
+    grid .f2 -in .f3
+    grid .f3 -in .f1
+} -cleanup {
+    grid_reset 3.12
+} -returnCodes error -result {can't put .f3 inside .f1, would cause management loop}
 
 test grid-4.1 {forget: basic argument checking} -body {
     grid forget foo
diff --git a/tests/pack.test b/tests/pack.test
index efb262b..cc517ed 100644
--- a/tests/pack.test
+++ b/tests/pack.test
@@ -976,6 +976,29 @@ test pack-10.4 {bad -in window does not change master} -setup {
     winfo manager .pack.a
     pack .pack.a -in .pack.a
 } -returnCodes error -result {can't pack .pack.a inside itself}
+test pack-10.5 {prevent management loops} -body {
+    frame .f1
+    frame .f2
+    pack .f1 -in .f2
+    pack .f2 -in .f1
+} -cleanup {
+    destroy .f1
+    destroy .f2
+} -returnCodes error -result {can't put .f2 inside .f1, would cause management loop}
+test pack-10.6 {prevent management loops} -body {
+    frame .f1
+    frame .f2
+    frame .f3
+    puts "packing frames"
+    pack .f1 -in .f2
+    pack .f2 -in .f3
+#    update idletasks
+    pack .f3 -in .f1
+} -cleanup {
+    destroy .f1
+    destroy .f2
+    destroy .f3
+} -returnCodes error -result {can't put .f3 inside .f1, would cause management loop}
 
 
 test pack-11.1 {info option} -setup {
diff --git a/tests/place.test b/tests/place.test
index ddfa64c..62e0ed2 100644
--- a/tests/place.test
+++ b/tests/place.test
@@ -118,7 +118,26 @@ test place-4.4 {ConfigureSlave procedure, bad -in option} -setup {
 } -body {
     place .t.f2 -in .
 } -returnCodes error -result {can't place .t.f2 relative to .}
-
+test place-4.5 {ConfigureSlave procedure, bad -in option} -setup {
+} -body {
+    frame .t.f1
+    place .t.f1 -in .t.f1
+} -returnCodes error -result {can't place .t.f1 relative to itself}
+test place-4.6 {prevent management loops} -setup {
+    place forget .t.f1
+} -body {
+    place .t.f1 -in .t.f2
+    place .t.f2 -in .t.f1
+} -returnCodes error -result {can't put .t.f2 inside .t.f1, would cause management loop}
+test place-4.7 {prevent management loops} -setup {
+    place forget .t.f1
+    place forget .t.f2
+} -body {
+    frame .t.f3
+    place .t.f1 -in .t.f2
+    place .t.f2 -in .t.f3
+    place .t.f3 -in .t.f1
+} -returnCodes error -result {can't put .t.f3 inside .t.f1, would cause management loop}
 
 test place-5.1 {ConfigureSlave procedure, -relwidth option} -body {
     place .t.f2 -relwidth abcd