android.util.Patterns.EMAIL在单元测试期间返回null

Question

我有一个代码,在验证器中有android.util.Patterns.EMAIL_ADDRESS.它在对设备运行时运行正常,但是当我在单元测试中运行此代码时,它返回null.此外,我尝试复制和粘贴模式中的内部代码,如下例所示.

validateEmail1有效// whyyy ???

validateEmail2返回null

private static final Pattern EMAIL = Pattern.compile(
        "[a-zA-Z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +
                "\\@" +
                "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}" +
                "(" +
                "\\." +
                "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,25}" +
                ")+"
);

public boolean validateEmail1(String email) {
    return EMAIL.matcher(email).matches();
}

public boolean validateEmail2(String email) {
    return Patterns.EMAIL_ADDRESS.matcher(email).matches();
}

Answer 1

好吧,我发现问题来自android.jar中的类.这些类在单元测试期间被模拟(参见tools.android.com/tech-docs/unit-testing-support),我必须使用robolectric来测试该类.