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Commit 47caac0

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Merge pull request eugenp#10285 from sk1418/delFileExt
[BAEL-4722] remove file extensions
2 parents bb74502 + 4c06b8e commit 47caac0

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2 files changed

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package com.baeldung.filenamewithoutextension;
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public class MyFilenameUtil {
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private MyFilenameUtil() {}
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public static String removeFileExtension(String filename, boolean removeAllExtensions) {
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if (filename == null || filename.isEmpty()) {
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return filename;
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}
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String extPattern = "(?<!^)[.]" + (removeAllExtensions ? ".*" : "[^.]*$");
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return filename.replaceAll(extPattern, "");
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}
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}
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package com.baeldung.filenamewithoutextension;
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import com.google.common.io.Files;
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import org.apache.commons.io.FilenameUtils;
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import org.junit.Test;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNotEquals;
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public class FileNameDelExtensionUnitTest {
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@Test
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public void givenDotFileWithoutExt_whenCallGuavaMethod_thenCannotGetDesiredResult() {
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//negative assertion
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assertNotEquals(".baeldung", Files.getNameWithoutExtension(".baeldung"));
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}
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@Test
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public void givenFileWithoutMultipleExt_whenCallGuavaMethod_thenCannotRemoveAllExtensions() {
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//negative assertion
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assertNotEquals("baeldung", Files.getNameWithoutExtension("baeldung.tar.gz"));
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}
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@Test
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public void givenDotFileWithoutExt_whenCallApacheCommonsMethod_thenCannotGetDesiredResult() {
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//negative assertion
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assertNotEquals(".baeldung", FilenameUtils.removeExtension(".baeldung"));
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}
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@Test
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public void givenFileWithoutMultipleExt_whenCallApacheCommonsMethod_thenCannotRemoveAllExtensions() {
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//negative assertion
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assertNotEquals("baeldung", FilenameUtils.removeExtension("baeldung.tar.gz"));
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}
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@Test
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public void givenFilenameNoExt_whenCallFilenameUtilMethod_thenGetExpectedFilename() {
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assertEquals("baeldung", MyFilenameUtil.removeFileExtension("baeldung", true));
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assertEquals("baeldung", MyFilenameUtil.removeFileExtension("baeldung", false));
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}
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@Test
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public void givenSingleExt_whenCallFilenameUtilMethod_thenGetExpectedFilename() {
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assertEquals("baeldung", MyFilenameUtil.removeFileExtension("baeldung.txt", true));
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assertEquals("baeldung", MyFilenameUtil.removeFileExtension("baeldung.txt", false));
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}
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@Test
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public void givenDotFile_whenCallFilenameUtilMethod_thenGetExpectedFilename() {
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assertEquals(".baeldung", MyFilenameUtil.removeFileExtension(".baeldung", true));
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assertEquals(".baeldung", MyFilenameUtil.removeFileExtension(".baeldung", false));
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}
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@Test
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public void givenDotFileWithExt_whenCallFilenameUtilMethod_thenGetExpectedFilename() {
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assertEquals(".baeldung", MyFilenameUtil.removeFileExtension(".baeldung.conf", true));
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assertEquals(".baeldung", MyFilenameUtil.removeFileExtension(".baeldung.conf", false));
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}
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@Test
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public void givenDoubleExt_whenCallFilenameUtilMethod_thenGetExpectedFilename() {
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assertEquals("baeldung", MyFilenameUtil.removeFileExtension("baeldung.tar.gz", true));
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assertEquals("baeldung.tar", MyFilenameUtil.removeFileExtension("baeldung.tar.gz", false));
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}
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@Test
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public void givenDotFileWithDoubleExt_whenCallFilenameUtilMethod_thenGetExpectedFilename() {
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assertEquals(".baeldung", MyFilenameUtil.removeFileExtension(".baeldung.conf.bak", true));
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assertEquals(".baeldung.conf", MyFilenameUtil.removeFileExtension(".baeldung.conf.bak", false));
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}
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}

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