Unit test failure in ImageMosaicFormatFactoryTest.testSystemLoaderUnbounded()
caused by test order assumption
-------------------------------------------------------------------------------------------------------------
Key: GEOT-3193
URL: http://jira.codehaus.org/browse/GEOT-3193
Project: GeoTools
Issue Type: Bug
Components: gc imagemosaic
Reporter: Ben Caradoc-Davies
ImageMosaicFormatFactoryTest.testSystemLoaderUnbounded() sets a system property
to trigger the loading of a configuration property file in the static
initialiser of ImageMosaicFormatFactory:
{code}
System.setProperty("mosaic.threadpoolconfig.path", file.getAbsolutePath());
{code}
Setting the system property has the nasty side-effect of modifying the
behaviour of the static initialiser of ImageMosaicFormatFactory if and only if
the static initialiser has not yet been called (i.e. the class has not been
loaded in the test runner JVM). As a consequence, if
ImageMosaicFormatFactoryTest is run by itself, it passes. If run after another
test such as GranuleTest that causes ImageMosaicFormatFactory to be loaded,
this test will fail because the static initialiser has already run, parameters
are already set to hardcoded defaults, and the property file is never used.
Setting a system property from within a unit test is a bad practice because it
causes unit tests to no longer be independent. Needing to do this suggests
ImageMosaicFormatFactory should be refactored to improve testability.
I have disabled this test by adding a n...@ignore annotation in r35906 on trunk
and r35907 on 2.6.x to fix the build. (This is why this issue is not a blocker.)
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