### Question:
ImputeVisitor implements MultiVisitor<double[]> { @Override public boolean trigger(final Node node) { return missing[node.getCut().getDimension()]; } ImputeVisitor(double[] queryPoint, int numberOfMissingValues, int[] missingIndexes);   ImputeVisitor(ImputeVisitor original); double getRank(); void accept(final Node node, final int depthOfNode); @Override void acceptLeaf(final Node leafNode, final int depthOfNode); @Override double[] getResult(); @Override boolean trigger(final Node node); @Override MultiVisitor<double[]> newCopy(); @Override void combine(MultiVisitor<double[]> other);  }### Answer:
@Test public void testTrigger() { Cut cut = mock(Cut.class); when(cut.getDimension()).thenReturn(1).thenReturn(0); Node node = mock(Node.class); when(node.getCut()).thenReturn(cut); assertTrue(visitor.trigger(node)); assertFalse(visitor.trigger(node)); }