你怎么抛出另一个ruby模块的异常？ （使用assert_throws）

I'm trying to write code like this:

我正在尝试编写这样的代码:

assert_throws(:ExtractionFailed) { unit.extract_from('5 x 2005')}

ExtractionFailed is a trivial subclass of Exception, and under test/unit, I'm trying to assert that it is thrown when I call unit.extract_from(... bad data...)

ExtractionFailed是Exception的一个简单子类,在test / unit下,我试图断言当我调用unit.extract_from时抛出它(...坏数据......)

I've moved ExtractionFailed into the SemanticText module, so now test/unit says:

我已将ExtractionFailed移动到SemanticText模块中,所以现在test / unit说:

<:ExtractionFailed> expected to be thrown but
<:"SemanticText::ExtractionFailed"> was thrown.

I tried writing assert_throws(:SemanticText::ExtractionFailed) {...} but I got the rather confusing message: TypeError: SemanticText is not a class/module

我尝试编写assert_throws(:SemanticText :: ExtractionFailed){...}但是我收到了相当混乱的消息:TypeError:SemanticText不是类/模块

I can make it work by doing the following (although it seems like a hack):

我可以通过执行以下操作使其工作(虽然它看起来像一个黑客):

  assert_throws(SemanticText::ExtractionFailed.to_s.to_sym) { unit.extract_from('5 x 2005')}

So what's the right way to say this assertion in ruby?

那么在红宝石中说这个断言的正确方法是什么?

1 个解决方案

#1

Put quotes around the symbol name after the colon e.g.

在冒号后面的符号名称周围加上引号,例如

assert_throws(:"SemanticText::ExtractionFailed") { unit.extract_from('5 x 2005')}

The quotes are necessary for a symbol that contains colons or other special characters.

对于包含冒号或其他特殊字符的符号,引号是必需的。

If you try :"SemanticText::ExtractionFailed".class in irb you will see that it is a Symbol, removing the need to use to_s and/or to_sym.

如果您尝试:irb中的“SemanticText :: ExtractionFailed”.class,您将看到它是一个符号,无需使用to_s和/或to_sym。