2011-05-03 23:35:48 +00:00
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gtk-reftest is a new test runner supposed to do a lot of generic tests.
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Run it like this:
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./gtk-reftest [OPTIONS] TESTFILE [TESTFILES...]
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where FILE is a GtkBuilder ui file to run.
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For a general test named "test", you want to have the following files:
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1) test.ui
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2) test.ref.ui
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3) test.css (optional)
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The test will then check that test.ui and test.ref.ui are rendered
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identically with the provided css.
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In detail, for every provided TESTFILE the test runner will:
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1) Add the css to the default screen
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2) Load the test.ui file and the test.ref.ui file
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3) Grab the first GtkWindow subclass widget
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4) gtk_widget_show() it and take a snapshot image of its contents into
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a cairo surface.
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5) Compare the two images to be bitwise identical. If they are not, a
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2020-08-21 12:41:13 +00:00
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diff image will be created highlighting the differences.
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2011-05-03 23:35:48 +00:00
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6) Save the images as png files to the output directory named:
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- test.out.png (rendering of test.ui)
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- test.ref.png (rendering of test.ref.ui)
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- test.diff.png (optional, differences from step 5)
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7) Fail the test if the two images are not bitwise identical
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Credit for the idea of reftests goes to Mozilla and in particular David
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Baron. For a larger introduction of why reftests are useful, see
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http://weblogs.mozillazine.org/roc/archives/2008/12/reftests.html
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