在 JUnit 中测试 CharSequences 的相等性

Question

以下测试成功运行：

assertEquals(a.toString(), b.toString());

以下不会：

assertEquals(a, b);

a是StringBuilder ，而b是不同类型的CharSequence 。

有什么方法可以测试CharSequence的相等性而不先将它们转换为String吗？

Answer 1

您可以使用CharBuffer s：

assertEquals(CharBuffer.wrap(a), CharBuffer.wrap(b));

CharBuffer的 .equals 的 javadoc 保证了这一点：

Tells whether or not this buffer is equal to another object.

Two char buffers are equal if, and only if,

    They have the same element type,

    They have the same number of remaining elements, and

    The two sequences of remaining elements, considered independently of their starting positions, are pointwise equal.