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[BAEL-3914] java regex: \\s vs \\s+

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This commit is contained in:
Kai Yuan 2020-03-17 00:31:37 +01:00
parent b60b729906
commit abf0620269
1 changed files with 32 additions and 0 deletions
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core-java-modules/core-java-regex/src/test/java/com/baeldung/replaceall/ReplaceAllWithWhitespaceRegexUnitTest.java Normal file
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package com.baeldung.replaceall;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class ReplaceAllWithWhitespaceRegexUnitTest {
private static final String INPUT_STR = "Text With Whitespaces! ";
@Test
public void givenString_whenReplaceBySingleCharClass_thenGetExpect() {
String expected = "Text___With_____Whitespaces!___";
String result = INPUT_STR.replaceAll("\\s", "_");
assertEquals(expected, result);
}
@Test
public void givenString_whenReplaceBySingleCharClassWithPlus_thenGetExpect() {
String expected = "Text_With_Whitespaces!_";
String result = INPUT_STR.replaceAll("\\s+", "_");
assertEquals(expected, result);
}
@Test
public void givenString_whenRemoveByWhitespace_thenGetSameResult() {
String expected = "TextWithWhitespaces!";
String result1 = INPUT_STR.replaceAll("\\s", "");
String result2 = INPUT_STR.replaceAll("\\s+", "");
assertEquals(expected, result1);
assertEquals(result1, result2);
}
}