FilterExpression implements Expression, Configurable { @Override public boolean isAction() { if (expression != null) { return expression.isAction(); } return false; } protected  FilterExpression(Expression expression); @Override void setOptions(FindOptions options); @Override void prepare(); @Override Result apply(PathData item, int depth); @Override void finish(); @Override String[] getUsage(); @Override String[] getHelp(); @Override boolean isAction(); @Override boolean isOperator(); @Override int getPrecedence(); @Override void addChildren(Deque<Expression> expressions); @Override void addArguments(Deque<String> args); @Override void setConf(Configuration conf); @Override Configuration getConf(); @Override String toString();  }
@Test public void isAction() { when(expr.isAction()).thenReturn(true).thenReturn(false); assertTrue(test.isAction()); assertFalse(test.isAction()); verify(expr, times(2)).isAction(); verifyNoMoreInteractions(expr); }