This bug was fixed in the package qtdeclarative-opensource-src -
5.6.1-7ubuntu1~2
---------------
qtdeclarative-opensource-src (5.6.1-7ubuntu1~2) yakkety; urgency=medium
* debian/patches/Fix-visibility-of-properties-in-value-types.patch:
- Fix compare() in QML (LP: #1610349)
* Update symbols.
* debian/patches/Fix-V4-on-big-endian.patch:
- Fixes value/tag reads on 32-bit big-endian and offsets on 64-bit.
(LP: #1606927)
-- Timo Jyrinki <[email protected]> Mon, 22 Aug 2016 13:31:32
+0000
** Changed in: qtdeclarative-opensource-src (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1610349
Title:
QML compare() does not reliably compare colours
Status in qtdeclarative-opensource-src package in Ubuntu:
Fix Released
Bug description:
See upstream bug https://bugreports.qt.io/browse/QTBUG-34878
There is already a fix upstream which has been merged to Qt5.8 ( see
https://codereview.qt-project.org/#/c/158967/ )
Without that fix, all the unit tests relying on compare() to compare colours
must be considered unreliable and potentially misleading, as they could be
producing PASSes instead of FAILs.
Bug description copied from that link:
"QtTest's compare() function considers two colors (the QML basic type) as
equal when they aren't.
I am aware that Qt.colorEqual exists (and it works correctly), but I think
that this makes it far too easy to write tests that don't catch an error.
Consider the following test case:
import QtQuick 2.2
import QtTest 1.0
Item {
Rectangle {
id: black
color: "#000000"
}
Rectangle {
id: white
color: "#ffffff"
}
TestCase {
name: "ColorComparison"
function test_this_should_fail() {
compare(black.color, white.color)
}
function test_this_is_ok() {
compare(black.color == white.color, false)
compare(Qt.colorEqual(black.color, white.color), false)
}
}
}"
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