/** イコール入力時の次の状態確認 */
@Test
public void inputEqualeNextState() {
State state = new RightInputState();
Formula formula = new Formula();
formula.setOperation(Operation.ADD);
State nextState = state.inputEquale(formula);
Assert.assertThat(nextState, is(instanceOf(EqualInputState.class)));
}
/** 四則演算入力時の表示 */
@Test
public void inputOperationDisplay() {
State state = new RightInputState();
Formula formula = new Formula();
formula.setLeft("1");
formula.setRight("5");
formula.setOperation(Operation.ADD);
state.inputOperation(formula, Operation.ADD);
String actual = state.getDisplayNumber(formula);
Assert.assertThat(actual, is("5"));
}