测试 Flash 消息的内容：`The assertion was not 运行 because of an invalid css selector`

Testing the content of a flash message: `The assertion was not run because of an invalid css selector`

我想测试一下 flash 消息是否包含特定文本。所以我有这条线：

assert_select flash[:info], "Your fee is valid till"

但是失败并显示错误消息：

DEPRECATION WARNING: The assertion was not run because of an invalid css selector.
unexpected '#' after ''

有人明白我做错了什么吗？

仅用于测试您不需要的消息assert_select。只有 assert 可以。 如果你想测试打印的 HTML 然后使用 assert_select。 assert_select 的第一个参数是 HTML 选择器，例如 div.

试试这个。

assert_equal "Your fee is valid till", flash[:info]

或

assert_select 'div.alert-info', flash[:info]