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| author | Robin Burchell <robin.burchell@crimson.no> | 2017-04-22 19:22:48 +0200 |
|---|---|---|
| committer | Robin Burchell <robin.burchell@crimson.no> | 2017-05-11 07:31:12 +0000 |
| commit | a9339e3ed4d2db11e75ed6c77fbe420708b44712 (patch) | |
| tree | e30a558444933c1b4e017b7e0fa6c1b86698595c /src/imports/testlib | |
| parent | cef5e9d385d0cf78e43e8ea41edf253b78f0ca13 (diff) | |
TestCase: Grow some new functionality on grabImage
Add some meta-information about the image that we can use to do slightly
stronger checks than just blindly poking pixel data (width & height
props).
In addition, when a test of a grabbed image fails (which they certainly do),
it is always nice if we can perform some diagnostics. To this end, add a
save() method to save the grabbed QImage to disk.
Tests for the new functionality are blacklisted on Linux at present, as they do
not yet appear stable, inheriting the other tst_grabImage flakiness.
[ChangeLog][QmlTest] The returned object from TestCase::grabImage now has
'width', 'height', and 'size' properties for additional verification. In
addition, there is a save() method to be able to persist the grabbed
image to disk (for diagnostics purposes, for example).
Change-Id: Ic651e0257102c514c39c3f648c05870f9d9c52e8
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Diffstat (limited to 'src/imports/testlib')
| -rw-r--r-- | src/imports/testlib/TestCase.qml | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/src/imports/testlib/TestCase.qml b/src/imports/testlib/TestCase.qml index 8c1744a2b2..dbed896c59 100644 --- a/src/imports/testlib/TestCase.qml +++ b/src/imports/testlib/TestCase.qml @@ -837,7 +837,14 @@ Item { Returns a snapshot image object of the given \a item. - The returned image object has the following methods: + The returned image object has the following properties: + \list + \li width Returns the width of the underlying image (since 5.10) + \li height Returns the height of the underlying image (since 5.10) + \li size Returns the size of the underlying image (since 5.10) + \endlist + + Additionally, the returned image object has the following methods: \list \li red(x, y) Returns the red channel value of the pixel at \a x, \a y position \li green(x, y) Returns the green channel value of the pixel at \a x, \a y position @@ -858,6 +865,21 @@ Item { var newImage = grabImage(rect); verify(!newImage.equals(image)); \endcode + \li save(path) Saves the image to the given \a path. If the image cannot + be saved, an exception will be thrown. (since 5.10) + + This can be useful to perform postmortem analysis on failing tests, for + example: + + \code + var image = grabImage(rect); + try { + compare(image.width, 100); + } catch (ex) { + image.save("debug.png"); + throw ex; + } + \endcode \endlist |