@Before
  public void setUp() {
    MockitoAnnotations.openMocks(this);

    when(functionContext.<RegionInformation[]>getResultSender()).thenReturn(resultSender);
  }
Characterization unit tests for {@code GetRegionsFunction};
geode-gfsh/src/test/java/org/apache/geode/management/internal/cli/functions/GetRegionsFunctionTest.java