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-rw-r--r--tests/text.test28
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/text.test b/tests/text.test
index d8ed533..7e754e2 100644
--- a/tests/text.test
+++ b/tests/text.test
@@ -1025,6 +1025,34 @@ test text-11a.12 {TextWidgetCmd procedure, "pendingyupdate" option} {
set fraction2 [lindex [.top.yt yview] 0]
lappend res [expr {$fraction1 == $fraction2}]
} {1 1 1}
+test text-11a.21 {"<<TextLineHeightsInvalid>>" event} {
+ destroy .top.yt .top
+ toplevel .top
+ pack [text .top.yt]
+ set content {}
+ for {set i 1} {$i < 300} {incr i} {
+ append content [string repeat "$i " 15] \n
+ }
+ .top.yt insert 1.0 $content
+ update
+ bind .top.yt <<TextLineHeightsInvalid>> { if {%d == 0} {set yud(%W) 1} }
+ # wait for end of line metrics calculation to get correct $fraction1
+ # as a reference
+ if {[.top.yt pendingyupdate]} {vwait yud(.top.yt)}
+ .top.yt yview moveto 1
+ set fraction1 [lindex [.top.yt yview] 0]
+ set res [expr {$fraction1 > 0}]
+ .top.yt delete 1.0 end
+ .top.yt insert 1.0 $content
+ # synchronously wait for completion of line metrics calculation
+ # and ensure the test is relevant
+ set waited 0
+ if {[.top.yt pendingyupdate]} {set waited 1 ; vwait yud(.top.yt)}
+ lappend res $waited
+ .top.yt yview moveto $fraction1
+ set fraction2 [lindex [.top.yt yview] 0]
+ lappend res [expr {$fraction1 == $fraction2}]
+} {1 1 1}
# edit, mark, scan, search, see, tag, window, xview and yview actions are tested elsewhere.