Class AdditionalFailureInfo

  • All Implemented Interfaces:
    org.junit.rules.TestRule

    public final class AdditionalFailureInfo
    extends Object
    implements org.junit.rules.TestRule
    A JUnit Rule that attaches additional info to any errors/exceptions thrown by the test.

    This is useful for tests where the line-number from a stacktrace doesn't provide enough detail about the failure, for example when an assertion fails inside a loop.

    This can be preferable to many calls to Truth.assertWithMessage(String) because it will also add info to errors/exceptions that bubble out from the system-under-test.

    Includes special handling for AssertionError to ensure that test failures are correctly distinguished from test errors (all other errors/exceptions).

    • Constructor Detail

      • AdditionalFailureInfo

        public AdditionalFailureInfo()
    • Method Detail

      • setInfo

        public void setInfo​(@Nullable
                            String info)
        Set the additional info to be added to any test failures. Pass null to skip adding any additional info.

        Can be called from any thread.

      • apply

        public org.junit.runners.model.Statement apply​(org.junit.runners.model.Statement base,
                                                       org.junit.runner.Description description)
        Specified by:
        apply in interface org.junit.rules.TestRule