Package de.cuioss.test.generator.impl

Class NonBlankStringGenerator

java.lang.Object

de.cuioss.test.generator.impl.NonBlankStringGenerator

All Implemented Interfaces:

TypedGenerator<String>

public class NonBlankStringGenerator
extends Object
implements TypedGenerator<String>

Generates non-empty and non-blank string values for testing purposes. This generator ensures that the produced strings contain at least one non-whitespace character.

Generation rules:

• Uses Generators.nonEmptyStrings() as base generator
• Validates that the string contains non-whitespace characters
• Retries up to 100 times to generate a valid string
• Throws IllegalStateException if no valid string can be generated

Example usage:

 var generator = new NonBlankStringGenerator();
 String value = generator.next(); // Returns a string with at least one non-whitespace char
 

This generator is particularly useful for testing input validation where whitespace-only strings should be treated differently from strings with actual content.

Author:

Oliver Wolff

See Also:

• Generators.nonEmptyStrings()

Constructor Summary

Constructors

Constructor	Description
NonBlankStringGenerator()

Method Summary

Modifier and Type	Method	Description
Class<String>	getType()	Provides type information about what kind of objects this generator creates.
String	next()	Generates the next instance based on the generator's configuration.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

NonBlankStringGenerator

public NonBlankStringGenerator()

Method Details

getType

public Class<String> getType()

Description copied from interface: TypedGenerator

Provides type information about what kind of objects this generator creates. The default implementation uses the first non-null result from TypedGenerator.next() to determine the type.

Note: If your generator may return null values or the generated type differs from the actual instance type, you should override this method.

Specified by:

getType in interface TypedGenerator<String>

Returns:

The class information indicating which type this generator is responsible for.

next

public String next()

Description copied from interface: TypedGenerator

Generates the next instance based on the generator's configuration. Implementations must ensure thread-safety.

Specified by:

next in interface TypedGenerator<String>

Returns:

A newly created instance. May be null if the generator explicitly supports null value generation.