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Fixes #1687
Adds tests to cover all the possible ways to provide configuration for jmx-scraper:
Only the
JmxConnectionTest
has been parameterized to cover those as the connection with the remote JVM is the most complicated part as the JVM system environment need to be propagated from properties to global system properties.The test fail when we remove the
JmxScraper#propagateToSystemProperties
method which handles system properties propagation.Adding those tests did not uncover any new issue, thus they help prevent any future regression.