java - Eclipse junit View 中的不可打印字符

Question

考虑以下示例:

assertEquals( "I am expecting this value on one line.\r\nAnd this value on this line",
    "I am expecting this value on one line.\nAnd this value on this line" );

Eclipse 中是否有任何调整或插件可以帮助识别字符串比较中额外的“\r”(或其他不可打印的字符)？

目前的结果比较并不能真正帮助我识别问题:

Answer 1

对于断言必须对“不可打印字符”敏感的情况，您可以使用自定义断言方法，该方法在比较之前将不可打印字符转换为其 unicode 表示形式。这是一些快速编写的代码用于说明(受到 this 和 this 的启发):

package org.gbouallet;

import java.awt.event.KeyEvent;

import org.junit.Assert;
import org.junit.Test;

public class NonPrintableEqualsTest {

@Test
public void test() {
    assertNonPrintableEquals(
            "I am expecting this value on one line.\r\nAnd this value on this line",
            "I am expecting this value on one line.\nAnd this value on this line");
}

private void assertNonPrintableEquals(String string1,
        String string2) {
    Assert.assertEquals(replaceNonPrintable(string1),
            replaceNonPrintable(string2));

}

public String replaceNonPrintable(String text) {
    StringBuffer buffer = new StringBuffer(text.length());
    for (int i = 0; i < text.length(); i++) {
        char c = text.charAt(i);
        if (isPrintableChar(c)) {
            buffer.append(c);
        } else {
            buffer.append(String.format("\\u%04x", (int) c));
        }
    }
    return buffer.toString();
}

public boolean isPrintableChar(char c) {
    Character.UnicodeBlock block = Character.UnicodeBlock.of(c);
    return (!Character.isISOControl(c)) && c != KeyEvent.CHAR_UNDEFINED
            && block != null && block != Character.UnicodeBlock.SPECIALS;
}
}