java - 验证电子邮件时出现 NullPointerException

Question

我正在编写一个单元测试来检查电子邮件验证逻辑。当您运行测试时，逻辑会抛出空指针异常。但它在模拟器上运行良好。有人可以帮我解决这个问题吗？

public static String validate(String email, String password) {
        if (email == null || email.isEmpty() || !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            return "Enter valid email address";
        }
        if (password.isEmpty() || password.length() < 4) {
            return "Password should be between 4 and 10 alphanumeric characters";
        }
        return null;
}

下面是我的单元测试。

@Test
public void validateShouldReturnMessageIfYouPassAnInvalidEmail() throws Exception {
    String validateMessage = LoginService.validate("abcdef", "password");
    assertEquals("Enter valid email address", validateMessage);
}

我得到的错误是，

java.lang.NullPointerException
at com.tryout.hemanth.expensetracker.service.LoginService.validate(LoginService.java:11)

Answer 1

使用PatternsCompat代替Patterns