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BAEL-838 Re-adding last changes with regexp and new line strings. (#1825) 

* Code for Dependency Injection Article.

* Added Java based configuration. Downloaded formatter.xml and reformatted
all changed files. Manually changed tab into 4 spaces in XML
configuration files.

* BAEL-434 - Spring Roo project files generated by Spring Roo. No
formatting applied. Added POM, java and resources folders.

* Moved project from roo to spring-roo folder.

* BAEL-838 Initial code showing how to remove last char - helper class and tests.

* BAEL-838 Corrected Helper class and associated empty string test case. Added StringUtils.substing tests.

* BAEL-838 Refromatted code using formatter.xml. Added Assert.assertEquals import. Renamed test to follow convention. Reordered tests.

* BAEL-838 - Added regex method and updated tests.

* BAEL-838 Added new line examples.
This commit is contained in:
iaforek 2017-05-11 11:22:34 +01:00 committed by pedja4
parent e8e3234647
commit 9fd2a911b1
2 changed files with 38 additions and 1 deletions
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8
core-java/src/main/java/com/baeldung/string/RemoveLastChar.java
View File

@ -8,4 +8,12 @@ public class RemoveLastChar {
return (s.substring(0, s.length() - 1));
}
}
public static String chop(String s) {
if (s == null) {
return s;
} else {
return s.replaceAll(".$", "");
}
}
}

31
core-java/src/test/java/com/baeldung/string/RemoveLastCharTest.java
View File

@ -1,7 +1,7 @@
package com.baeldung.string;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import org.apache.commons.lang3.StringUtils;
import org.junit.Test;
@ -12,18 +12,23 @@ public class RemoveLastCharTest {
public static final String EMPTY_STRING = "";
public static final String ONE_CHAR_STRING = "a";
public static final String WHITE_SPACE_AT_THE_END_STRING = "abc ";
public static final String NEW_LINE_AT_THE_END_STRING = "abc\n";
public static final String MULTIPLE_LINES_STRING = "abc\ndef";
@Test
public void givenTestString_whenSubstring_thenGetStingWithoutLastChar() {
assertEquals("abcde", RemoveLastChar.substring(TEST_STRING));
assertEquals("abcde", StringUtils.substring(TEST_STRING, 0, TEST_STRING.length() - 1));
assertEquals("abcde", StringUtils.chop(TEST_STRING));
assertEquals("abcde", TEST_STRING.replaceAll(".$", ""));
assertEquals("abcde", RemoveLastChar.chop(TEST_STRING));
}
@Test
public void givenNullString_whenSubstring_thenGetNullString() {
assertEquals(NULL_STRING, RemoveLastChar.substring(NULL_STRING));
assertEquals(NULL_STRING, StringUtils.chop(NULL_STRING));
assertEquals(NULL_STRING, RemoveLastChar.chop(NULL_STRING));
}
@Test
@ -31,6 +36,8 @@ public class RemoveLastCharTest {
assertEquals(EMPTY_STRING, RemoveLastChar.substring(EMPTY_STRING));
assertEquals(EMPTY_STRING, StringUtils.substring(EMPTY_STRING, 0, EMPTY_STRING.length() - 1));
assertEquals(EMPTY_STRING, StringUtils.chop(EMPTY_STRING));
assertEquals(EMPTY_STRING, EMPTY_STRING.replaceAll(".$", ""));
assertEquals(EMPTY_STRING, RemoveLastChar.chop(EMPTY_STRING));
}
@Test
@ -38,6 +45,8 @@ public class RemoveLastCharTest {
assertEquals(EMPTY_STRING, RemoveLastChar.substring(ONE_CHAR_STRING));
assertEquals(EMPTY_STRING, StringUtils.substring(ONE_CHAR_STRING, 0, ONE_CHAR_STRING.length() - 1));
assertEquals(EMPTY_STRING, StringUtils.chop(ONE_CHAR_STRING));
assertEquals(EMPTY_STRING, ONE_CHAR_STRING.replaceAll(".$", ""));
assertEquals(EMPTY_STRING, RemoveLastChar.chop(ONE_CHAR_STRING));
}
@Test
@ -45,5 +54,25 @@ public class RemoveLastCharTest {
assertEquals("abc", RemoveLastChar.substring(WHITE_SPACE_AT_THE_END_STRING));
assertEquals("abc", StringUtils.substring(WHITE_SPACE_AT_THE_END_STRING, 0, WHITE_SPACE_AT_THE_END_STRING.length() - 1));
assertEquals("abc", StringUtils.chop(WHITE_SPACE_AT_THE_END_STRING));
assertEquals("abc", WHITE_SPACE_AT_THE_END_STRING.replaceAll(".$", ""));
assertEquals("abc", RemoveLastChar.chop(WHITE_SPACE_AT_THE_END_STRING));
}
@Test
public void givenStringWithNewLineAtTheEnd_whenSubstring_thenGetStringWithoutNewLine() {
assertEquals("abc", RemoveLastChar.substring(NEW_LINE_AT_THE_END_STRING));
assertEquals("abc", StringUtils.substring(NEW_LINE_AT_THE_END_STRING, 0, NEW_LINE_AT_THE_END_STRING.length() - 1));
assertEquals("abc", StringUtils.chop(NEW_LINE_AT_THE_END_STRING));
assertNotEquals("abc", NEW_LINE_AT_THE_END_STRING.replaceAll(".$", ""));
assertNotEquals("abc", RemoveLastChar.chop(NEW_LINE_AT_THE_END_STRING));
}
@Test
public void givenMultiLineString_whenSubstring_thenGetStringWithoutNewLine() {
assertEquals("abc\nde", RemoveLastChar.substring(MULTIPLE_LINES_STRING));
assertEquals("abc\nde", StringUtils.substring(MULTIPLE_LINES_STRING, 0, MULTIPLE_LINES_STRING.length() - 1));
assertEquals("abc\nde", StringUtils.chop(MULTIPLE_LINES_STRING));
assertEquals("abc\nde", MULTIPLE_LINES_STRING.replaceAll(".$", ""));
assertEquals("abc\nde", RemoveLastChar.chop(MULTIPLE_LINES_STRING));
}
}