org.junit.experimental.theories
Class ParameterSupplier

java.lang.Object
  org.junit.experimental.theories.ParameterSupplier

Direct Known Subclasses:

TestedOnSupplier

public abstract class ParameterSupplier
   

    extends 
    Object
   

Abstract parent class for suppliers of input data points for theories. Extend this class to customize how Theories runner finds accepted data points. Then use your class together with @ParametersSuppliedBy on input parameters for theories.

For example, here is a supplier for values between two integers, and an annotation that references it:

     @Retention(RetentionPolicy.RUNTIME)
     @ParametersSuppliedBy(BetweenSupplier.class)
     public @interface Between {
         int first();

         int last();
     }

     public static class BetweenSupplier extends ParameterSupplier {
         @Override
         public List<PotentialAssignment> getValueSources(ParameterSignature sig) {
             List<PotentialAssignment> list = new ArrayList<PotentialAssignment>();
             Between annotation = (Between) sig.getSupplierAnnotation();

             for (int i = annotation.first(); i <= annotation.last(); i++)
                 list.add(PotentialAssignment.forValue("ints", i));
             return list;
         }
     }
 

See Also:

ParametersSuppliedBy, Theories, FromDataPoints

     

ParameterSupplier

public ParameterSupplier()

getValueSources

public abstract List<PotentialAssignment> getValueSources(ParameterSignature sig)
                                                   throws Throwable

Throws:

Throwable

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