package jnpf.util;

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

public class PrivacyMaskUtilTest {

    @Test
    public void shouldMaskStandardMobilePhone() {
        assertEquals("138****5678", PrivacyMaskUtil.maskMobilePhone("13812345678"));
    }

    @Test
    public void shouldKeepEmptyValues() {
        assertNull(PrivacyMaskUtil.maskMobilePhone(null));
        assertEquals("", PrivacyMaskUtil.maskMobilePhone(""));
        assertEquals("  ", PrivacyMaskUtil.maskMobilePhone("  "));
    }

    @Test
    public void shouldKeepAlreadyMaskedMobilePhone() {
        assertEquals("138****5678", PrivacyMaskUtil.maskMobilePhone("138****5678"));
    }

    @Test
    public void shouldFullyMaskUnexpectedNonEmptyValue() {
        assertEquals("****", PrivacyMaskUtil.maskMobilePhone("123456"));
        assertEquals("****", PrivacyMaskUtil.maskMobilePhone("+8613812345678"));
        assertEquals("****", PrivacyMaskUtil.maskMobilePhone("138*2345678"));
    }

    @Test
    public void shouldSubstringLastNumber() {
        assertEquals("5678", PrivacyMaskUtil.substringLastNumber("13812345678"));
        assertEquals("678", PrivacyMaskUtil.substringLastNumber("13812345678", 3));
        assertEquals("123", PrivacyMaskUtil.substringLastNumber("123", 4));
        assertEquals("", PrivacyMaskUtil.substringLastNumber("123", 0));
        assertNull(PrivacyMaskUtil.substringLastNumber(null));
    }
}