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junit.framework.AssertionFailedError: null	at junit.framework.Assert.fail(Assert.java:47)	at junit.framework.Assert.assertTrue(Assert.java:20)	at junit.framework.Assert.assertTrue(Assert.java:27)	at hudson.plugins.mercurial.MercurialTestCase.buildAndCheck(MercurialTestCase.java:47)	at hudson.plugins.mercurial.MercurialSCMTest.testBranches(MercurialSCMTest.java:47)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)