### Question:
BooleanValue extends Value { @Override BooleanValue toBooleanValue () { return this; } BooleanValue(boolean value);   BooleanValue(String text); @Override String toString();  }### Answer:
@Test public void testToBooleanValue () { assertEquals ("true", mTrueValue.toBooleanValue ().toString ()); assertEquals ("false", mFalseValue.toBooleanValue ().toString ()); }