refactor: remove commons-lang3 dependency

* test: add JUnit 5 and register src/test/java as test source directory

- Add junit-jupiter 5.14.3 for Java unit tests alongside existing Spock specs
- Add build-helper-maven-plugin 3.6.1 to register src/test/java so
  maven-compiler-plugin picks it up in addition to the Groovy sources
  compiled by gmavenplus

* refactor: remove commons-lang3 dependency

Replace all commons-lang3 usages with project-owned utility classes:

- StringUtils: leftPad, strip, deleteWhitespace, lowerCase, capitalize,
  uncapitalize, endsWith, removeEnd, replaceChars, left, latinize,
  escapeNonAscii, split, joinWithSpace
- RandomUtils: randomNumeric, randomAlphabetic, randomAlphanumeric
- ValidateUtils: notNull, isTrue

Also remove TextUtils (methods migrated to StringUtils) and add
package-info.java for the util package.

Author: spannm

pom.xml

@@ -86,12 +86,6 @@
 			<artifactId>snakeyaml-engine</artifactId>
 			<version>2.3</version>
 		</dependency>
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>commons-lang3</artifactId>
-			<version>3.18.0</version>
-		</dependency>
-
 		<dependency>
 			<groupId>org.jspecify</groupId>
 			<artifactId>jspecify</artifactId>
@@ -143,8 +137,12 @@
 			<version>3.4</version>
 			<scope>test</scope>
 		</dependency>
-
-
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter</artifactId>
+			<version>5.14.3</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
 
@@ -155,6 +153,25 @@
 				<artifactId>maven-resources-plugin</artifactId>
 				<version>3.3.1</version>
 			</plugin>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>build-helper-maven-plugin</artifactId>
+				<version>3.6.1</version>
+				<executions>
+					<execution>
+						<id>add-test-source</id>
+						<phase>generate-test-sources</phase>
+						<goals>
+							<goal>add-test-source</goal>
+						</goals>
+						<configuration>
+							<sources>
+								<source>${project.basedir}/src/test/java</source>
+							</sources>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>

src/main/java/com/devskiller/jfairy/data/MapBasedDataMaster.java

@@ -12,12 +12,12 @@
 import java.util.List;
 import java.util.Map;
 
-import org.apache.commons.lang3.EnumUtils;
-import org.apache.commons.lang3.Validate;
 import org.snakeyaml.engine.v2.api.Load;
 import org.snakeyaml.engine.v2.api.LoadSettings;
+
 import com.devskiller.jfairy.producer.BaseProducer;
 import com.devskiller.jfairy.producer.util.LanguageCode;
+import com.devskiller.jfairy.producer.util.ValidateUtils;
 
 
 public class MapBasedDataMaster implements DataMaster {
@@ -72,17 +72,23 @@ public String getRandomValue(String key) {
 
 	@Override
 	public LanguageCode getLanguage() {
-		return EnumUtils.getEnum(LanguageCode.class, getString(LANGUAGE_TAG).toUpperCase());
+		String tag = getString(LANGUAGE_TAG).toUpperCase();
+		try {
+			return LanguageCode.valueOf(tag);
+		} catch (IllegalArgumentException ex) {
+			throw new IllegalArgumentException("Unknown language tag: " + tag, ex);
+		}
 	}
 
-	@SuppressWarnings({"unchecked", "ConstantConditions"}) // checked by Validate
+	@SuppressWarnings({"unchecked", "ConstantConditions"})
 	<T> T getData(String key, Class<T> type) {
-		Validate.notNull(key, "key cannot be null");
-		Validate.notNull(type, "type cannot be null");
+		ValidateUtils.notNull(key, "key cannot be null");
+		ValidateUtils.notNull(type, "type cannot be null");
 
 		Object element = dataSource.get(key);
-		Validate.isTrue(element != null, "No such key: %s", key);
-		Validate.isTrue(type.isAssignableFrom(element.getClass()),
+
+		ValidateUtils.isTrue(element != null, "No such key: %s", key);
+		ValidateUtils.isTrue(type.isAssignableFrom(element.getClass()),
 			"Element under desired key has incorrect type - should be %s", type.getSimpleName());
 
 		return (T) element;

src/main/java/com/devskiller/jfairy/producer/DateProducer.java

@@ -11,7 +11,7 @@
 import java.time.Period;
 import java.time.ZoneOffset;
 
-import org.apache.commons.lang3.Validate;
+import com.devskiller.jfairy.producer.util.ValidateUtils;
 
 import static java.time.temporal.TemporalAdjusters.firstDayOfYear;
 import static java.time.temporal.TemporalAdjusters.lastDayOfYear;
@@ -30,7 +30,7 @@ public DateProducer(BaseProducer baseProducer, TimeProvider timeProvider) {
 	}
 
 	public LocalDateTime randomDateInThePast(int maxYearsEarlier) {
-		Validate.isTrue(maxYearsEarlier >= 0, "%d has to be >= 0", maxYearsEarlier);
+		ValidateUtils.isTrue(maxYearsEarlier >= 0, "%d has to be >= 0", maxYearsEarlier);
 		LocalDateTime currentDate = timeProvider.getCurrentTime();
 		LocalDateTime latestDateInThePast = currentDate.minusSeconds(SECONDS_BEFORE_TO_BE_IN_THE_PAST);
 		LocalDateTime maxYearsEarlierDate = currentDate.minusYears(maxYearsEarlier);
@@ -54,7 +54,7 @@ public LocalDateTime randomDateBetweenTwoDates(LocalDateTime from, LocalDateTime
 	}
 
 	public LocalDateTime randomDateBetweenYears(int fromYear, int toYear) {
-		Validate.isTrue(fromYear <= toYear, "%d has to be <= %d", fromYear, toYear);
+		ValidateUtils.isTrue(fromYear <= toYear, "%d has to be <= %d", fromYear, toYear);
 		LocalDateTime fromDate = getDateForFirstDayForGivenYear(fromYear);
 		LocalDateTime toDate = getDateForLastDayForGivenYear(toYear);
 		return randomDateBetweenTwoDates(fromDate, toDate);

src/main/java/com/devskiller/jfairy/producer/company/DefaultCompanyProvider.java

@@ -1,12 +1,14 @@
 package com.devskiller.jfairy.producer.company;
 
 
-import org.apache.commons.lang3.StringUtils;
-
 import com.devskiller.jfairy.data.DataMaster;
 import com.devskiller.jfairy.producer.BaseProducer;
 import com.devskiller.jfairy.producer.VATIdentificationNumberProvider;
-import com.devskiller.jfairy.producer.util.TextUtils;
+
+import static com.devskiller.jfairy.producer.util.StringUtils.deleteWhitespace;
+import static com.devskiller.jfairy.producer.util.StringUtils.escapeNonAscii;
+import static com.devskiller.jfairy.producer.util.StringUtils.strip;
+import static com.devskiller.jfairy.producer.util.StringUtils.latinize;
 
 public class DefaultCompanyProvider implements CompanyProvider {
 
@@ -70,9 +72,9 @@ public void generateDomain() {
 			return;
 		}
 
-		String host = TextUtils.stripAccents(StringUtils.strip(StringUtils.deleteWhitespace(name.toLowerCase()), ".").replace("/", ""));
+		String host = latinize(strip(deleteWhitespace(name.toLowerCase()), ".").replace("/", ""));
 		int len1 = host.length();
-		host = TextUtils.escapeNonAscii(host).replaceAll("\\\\u", "");
+		host = escapeNonAscii(host).replaceAll("\\\\u", "");
 		int len2 = host.length();
 		if (len2 > len1 && len2 > 10)
 			host = host.substring(0, 10);

src/main/java/com/devskiller/jfairy/producer/company/locale/de/DeVATIdentificationNumberProvider.java

@@ -2,7 +2,7 @@
 
 import com.devskiller.jfairy.producer.VATIdentificationNumberProvider;
 
-import static org.apache.commons.lang3.RandomStringUtils.randomNumeric;
+import static com.devskiller.jfairy.producer.util.RandomUtils.randomNumeric;
 
 /**
  * German VAT identification number (Umsatzsteuer-Identifikationsnummer or USt-IdNr.)

src/main/java/com/devskiller/jfairy/producer/company/locale/en/EnVATIdentificationNumberProvider.java

@@ -7,7 +7,8 @@
 
 import static java.lang.String.valueOf;
 import static java.lang.System.arraycopy;
-import static org.apache.commons.lang3.StringUtils.leftPad;
+
+import static com.devskiller.jfairy.producer.util.StringUtils.leftPad;
 
 /**
  * American VAT Identification Number (known as Employer Identification Number or EIN in the United States)

src/main/java/com/devskiller/jfairy/producer/company/locale/es/EsVATIdentificationNumberProvider.java

@@ -4,9 +4,9 @@
 
 import com.devskiller.jfairy.producer.VATIdentificationNumberProvider;
 
-import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
-import static org.apache.commons.lang3.RandomStringUtils.randomAlphanumeric;
-import static org.apache.commons.lang3.RandomStringUtils.randomNumeric;
+import static com.devskiller.jfairy.producer.util.RandomUtils.randomAlphabetic;
+import static com.devskiller.jfairy.producer.util.RandomUtils.randomAlphanumeric;
+import static com.devskiller.jfairy.producer.util.RandomUtils.randomNumeric;
 
 /**
  * Spanish VAT Identification Number (known as Número de Identificación Fiscal (for freelancers) or Código de Identificación Fiscal (for companies)	 in Spain)

src/main/java/com/devskiller/jfairy/producer/company/locale/pl/PlVATIdentificationNumberProvider.java

@@ -9,7 +9,8 @@
 
 import static java.lang.String.format;
 import static java.lang.String.valueOf;
-import static org.apache.commons.lang3.StringUtils.leftPad;
+
+import static com.devskiller.jfairy.producer.util.StringUtils.leftPad;
 
 /**
  * Polish VAT Identification Number (known as NIP Numer Identyfikacji Podatkowej in Poland)

src/main/java/com/devskiller/jfairy/producer/company/locale/sk/SkVATIdentificationNumberProvider.java

@@ -8,7 +8,8 @@
 
 import static java.lang.String.format;
 import static java.lang.String.valueOf;
-import static org.apache.commons.lang3.StringUtils.leftPad;
+
+import static com.devskiller.jfairy.producer.util.StringUtils.leftPad;
 
 /**
  * Slovak VAT Identification Number (known as NIP)

src/main/java/com/devskiller/jfairy/producer/company/locale/sv/SvVATIdentificationNumberProvider.java

@@ -8,11 +8,12 @@
 import com.devskiller.jfairy.producer.person.NationalIdentificationNumberFactory;
 import com.devskiller.jfairy.producer.person.NationalIdentificationNumberProvider;
 
+import static java.lang.String.valueOf;
+
 import static com.devskiller.jfairy.producer.person.NationalIdentificationNumberProperties.dateOfBirth;
 import static com.devskiller.jfairy.producer.person.locale.sv.SvNationalIdentificationNumberProvider.calculateChecksum;
-import static java.lang.String.valueOf;
-import static org.apache.commons.lang3.RandomStringUtils.randomNumeric;
-import static org.apache.commons.lang3.StringUtils.leftPad;
+import static com.devskiller.jfairy.producer.util.RandomUtils.randomNumeric;
+import static com.devskiller.jfairy.producer.util.StringUtils.leftPad;
 
 /**
  * Swedish VAT Identification Number (known as Momsnummer in Sweden)