Clases utiliarias para automatizar los Test Unitarios

Aquí tienen otra clase utilitaria para automatizar los Test Unitarios.

También pueden echar un vistazo a testUtils, es una libreria interesante que les ayudara a realizar los test unitarios de una manera más elegante y sin escribir tanta redundancia de código:

package com.hector;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.persistence.Embeddable;
import javax.persistence.Entity;

import org.junit.Assert;
import org.junit.Test;
import org.powermock.reflect.Whitebox;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Test automatique des getter/setter. A voir si on s'en sert.
 */
public class BeansAutomatedTest {
 /** logger */
 private static final Logger LOGGER = LoggerFactory
 .getLogger(BeansAutomatedTest.class);

 /** prefixes possibles pour les noms des getters */
 public static final String[] POSSIBLE_GETTER_PREFIXES = { "get", "is",
 "has" };

 /** prefixes possibles pour les noms des setters */
 private static final String[] POSSIBLE_SETTER_PREFIXES = { "set" };

 /**
 * map des implémentations à utiliser pour instancier des interfaces. Ex:
 * List --> ArrayList
 */
 private static final Map <Class <?>, Class <?>> IMPLEMENTATIONS_TO_USE = new HashMap <Class <?>, Class <?>>();

 /**
 * map des wrapper de types primitifs à utiliser pour tester les
 * getter/setter sur des Integer, Boolean...
 */
 private static final Set <Class <?>> BOXED_PRIMITIVES = new HashSet <Class <?>>();

 /**
 * map des primitifs à utiliser pour tester les getter/setter sur des types
 * primitifs int, boolean...
 */
 private static final Map <Class <?>, Object> PRIMITIVES_TO_USE = new HashMap <Class <?>, Object>();

 /** map des tableaux de champs à ignorer par classe */
 private static final Map <String, List <String>> IGNORED_FIELDS = new HashMap <String, List <String>>();

 /** list des classes ignorées */
 private static final List <String> IGNORED_BEANS = new ArrayList <String>();

 private static enum TypeTest {
 Entities, Representations, Dto, Vo
 }

 static {
 IMPLEMENTATIONS_TO_USE.put(List.class, ArrayList.class);
 IMPLEMENTATIONS_TO_USE.put(Set.class, HashSet.class);
 IMPLEMENTATIONS_TO_USE.put(Collection.class, ArrayList.class);
 IMPLEMENTATIONS_TO_USE.put(Map.class, HashMap.class);

 BOXED_PRIMITIVES.add(Integer.class);
 BOXED_PRIMITIVES.add(Long.class);
 BOXED_PRIMITIVES.add(Character.class);
 BOXED_PRIMITIVES.add(Double.class);
 BOXED_PRIMITIVES.add(Float.class);
 BOXED_PRIMITIVES.add(Boolean.class);
 BOXED_PRIMITIVES.add(BigDecimal.class);

 PRIMITIVES_TO_USE.put(int.class, 0);
 PRIMITIVES_TO_USE.put(Integer.class, 0);
 PRIMITIVES_TO_USE.put(long.class, 0L);
 PRIMITIVES_TO_USE.put(Long.class, 0L);
 PRIMITIVES_TO_USE.put(char.class, '\0');
 PRIMITIVES_TO_USE.put(Character.class, '\0');
 PRIMITIVES_TO_USE.put(boolean.class, true);
 PRIMITIVES_TO_USE.put(Boolean.class, Boolean.TRUE);
 PRIMITIVES_TO_USE.put(float.class, 0f);
 PRIMITIVES_TO_USE.put(Float.class, 0f);
 PRIMITIVES_TO_USE.put(double.class, 0d);
 PRIMITIVES_TO_USE.put(Double.class, 0d);
 PRIMITIVES_TO_USE.put(BigDecimal.class, BigDecimal.ZERO);

 // Les champs ci-dessous sont modifiés à leur set ou à leur get
 // TODO tester ces getters/setters unitairement
 IGNORED_FIELDS
 .put("com.hector.initialization.portefeuilledecommandes.PortefeuilleDeCommandesDto",
 Arrays.asList(new String[] { "paysGamme",
 "paysCommerce", "paysProgramme" }));
 IGNORED_FIELDS
 .put("com.hector.batch.referentiels.produit.bcv.BcvRequestHeaderDto",
 Arrays.asList(new String[] { "header" }));
 IGNORED_FIELDS.put(
 "com.hector.domain.centredemontage.JourDeProduction",
 Arrays.asList(new String[] { "dateJourProd" }));
 IGNORED_FIELDS
 .put("com.hector.rest.commande.RechercheCommandePlanifieRepresentation",
 Arrays.asList(new String[] { "familles" }));
 IGNORED_FIELDS
 .put("com.hector.cycleprogramme.AppariementRepresentation",
 Arrays.asList(new String[] { "alerte" }));
 IGNORED_FIELDS
 .put("com.hector.rest.cycleprogramme.CycleProgrammeRepresentation",
 Arrays.asList(new String[] { "numSeqAnnee" }));
 IGNORED_FIELDS
 .put("com.hector.rest.seuilsAlerteventes.SeuilsAlerteVentesRepresentation",
 Arrays.asList(new String[] { "codePcom" }));
 IGNORED_FIELDS
 .put("com.hector.rest.traitement.TraitementDeDefilementRepresentation",
 Arrays.asList(new String[] { "annee", "Numordre" }));
 IGNORED_FIELDS
 .put("com.hector.rest.centredemontage.DifferentielcalendrierRepresentation",
 Arrays.asList(new String[] { "dateJourProdstring" }));

 // Beans ignorés
 // TODO tester ces beans unitairement
 IGNORED_BEANS
 .add("com.hector.batch.diffusion.evn.EVNRequestFooterDto");
 IGNORED_BEANS
 .add("com.hector.batch.diffusion.evn.EVNRequestHeaderDto");
 IGNORED_BEANS
 .add("com.hector.batch.diffusion.ftr.FDPFtrRequestBodyDto");
 IGNORED_BEANS
 .add("com.hector.batch.diffusion.sisif.SisifDiffOfEnvoyeUsineRequestBodyDto");
 IGNORED_BEANS
 .add("com.hector.batch.luoreactualisee.PostEusiKeyDto");
 IGNORED_BEANS
 .add("com.hector.batch.replanification.officialisation.IodaDto");
 IGNORED_BEANS.add("com.hector.rest.PEDBaseRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.chart.XDateYIntSizeValuesRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.chart.XDateYIntValuesRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.chart.XDateYIntZIntValuesRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.pfab.PossibiliteFabricationRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.replanification.AttributionCessionModeRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.replanification.AttributionCessionSemaineRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.replanification.AvanceRetardVolumeCafRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.replanification.CommandesEspaceAttenteRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.replanification.PopulationSFPRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.replanification.ResultatRessourceRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.replanification.SuiviQualitatifReplanifRepresentation");
 IGNORED_BEANS
 .add("com.hector.rest.ressource.AleaRessourceRepresentation");
 IGNORED_BEANS.add("com.hector.rest.slot.SlotVoRepresentation");
 IGNORED_BEANS.add("com.hector.rest.slot.TimeLineRepresentation");
 }

 @Test
 public void testPEDAppDtos() {
 new PEDBeansAutomatedTest().test("com.hector.app", TypeTest.Dto);
 }

 @Test
 public void testPEDBatchDtos() {
 new PEDBeansAutomatedTest().test("com.hector.batch", TypeTest.Dto);
 }

 @Test
 public void testPEDDomainEntities() {
 new PEDBeansAutomatedTest().test("com.hector.domain",
 TypeTest.Entities);
 }

 @Test
 public void testPEDDomainVos() {
 new PEDBeansAutomatedTest().test("com.hector.domain", TypeTest.Vo);
 }

 @Test
 public void testPEDWebRepresentations() {
 new PEDBeansAutomatedTest().test("com.hector.rest",
 TypeTest.Representations);
 }

 /**
 * Méthode principale de test.  <br>
 * 1. Collecte les entités. <br>
 * 2. Teste les entités. <br>
 * 3. Affiche les résultats. <br>
 * 
 * @param domainPkg
 * package contenant les entités à tester. Seul un niveau
 * d'arborescence est supporté pour l'instant (domain/container,
 * domain/magasin....)
 */
 public void test(String domainPkg, TypeTest typeTest) {

 List <Class <?>> entitiesToTest = collectAllEntities(domainPkg, typeTest);
 TestResult allTestsResults = new TestResult();
 for (Class <?> entity : entitiesToTest) {
 if (IGNORED_BEANS.contains(entity.getName())) {
 LOGGER.debug("Bean {} ignored", entity.getName());
 allTestsResults.addIgnoredBean();
 } else {
 allTestsResults.merge(testEntity(entity));
 }
 }
 LOGGER.info("{} beans of type {} have been tested in {}",
 entitiesToTest.size(), typeTest, domainPkg);
 LOGGER.info(" --> {} beans ignored",
 allTestsResults.getNbBeansIgnored());
 LOGGER.info(" --> {} fields tested OK",
 allTestsResults.getNbTestedSucceeded());
 LOGGER.info(" --> {} fields tested KO",
 allTestsResults.getNbTestedFailed());
 LOGGER.info(
 " --> {} fields could not be tested due to primitive/implementation issues",
 allTestsResults.getNbNotTestedDueToPrimitiveOrImp());
 LOGGER.info(" --> {} fields could not be tested due to other issues",
 allTestsResults.getNbNotTestedOther());
 LOGGER.info(" --> {} fields ignored", allTestsResults.getNbIgnored());

 Assert.assertEquals(0, allTestsResults.getNbTestedFailed());
 Assert.assertEquals(0,
 allTestsResults.getNbNotTestedDueToPrimitiveOrImp());
 Assert.assertEquals(0, allTestsResults.getNbNotTestedOther());
 }

 /**
 * try to test the getter / setter of the entity. Return true if it was
 * tested
 * 
 * @param entityClass
 * entity to test
 * @return number of tested getter/setter pairs
 */
 private TestResult testEntity(Class <?> entityClass) {
 LOGGER.debug("Trying to test {}", entityClass.getName());
 List <String> ignoredFields = (IGNORED_FIELDS.containsKey(entityClass
 .getName())) ? IGNORED_FIELDS.get(entityClass.getName())
 : new ArrayList <String>();
 TestResult testResultClass = new TestResult();
 try {
 Object entityInstance = tryToInstantiateClass(entityClass);

 if (entityInstance == null) {
 LOGGER.warn("Bean {} could not be instantiated.",
 entityClass.getName());
 testResultClass.merge(TestResultType.NOT_TESTED_DUE_TO_OTHER
 .getTestResult());
 } else {
 for (Field field : entityClass.getDeclaredFields()) {
 if (ignoredFields.contains(field.getName())) {
 LOGGER.debug("Field {} of {} ignored.",
 field.getName(), entityClass.getName());
 testResultClass.merge(TestResultType.IGNORED
 .getTestResult());
 } else {
 Method getter = this.findGetter(entityClass, field);
 Method setter = this.findSetter(entityClass, field);
 if (getter != null && setter != null) {
 LOGGER.debug(
 "Getter and setter found for field {}.",
 field.getName());
 TestResultType oneTest = setThenGet(entityInstance,
 field, setter, getter);
 testResultClass.merge(oneTest.getTestResult());
 }
 }
 }
 }

 } catch (SecurityException e) {
 LOGGER.warn(e.getMessage(), e);
 } catch (IllegalArgumentException e) {
 LOGGER.warn(e.getMessage(), e);
 }

 return testResultClass;

 }

 /**
 * Set puis get un objet. Vérifie que l'objet setté est bien l'objet getté.
 * 
 * @param entityInstance
 * instance de l'entité testée
 * @param field
 * attribut de l'instance
 * @param setter
 * setter de l'attribut
 * @param getter
 * getter de l'attribut
 * @return résultat du test
 */
 private TestResultType setThenGet(Object entityInstance, Field field,
 Method setter, Method getter) {
 TestResultType result = TestResultType.NOT_TESTED_DUE_TO_OTHER;
 try {
 Class <?> type = field.getType();
 Object objectToSet = createInstanceOfType(type);
 if (objectToSet == null) {
 LOGGER.warn("Class {} : could not create {}", entityInstance
 .getClass().getName(), field.getName());
 result = TestResultType.NOT_TESTED_DUE_TO_PRIMITIVE_OR_IMPLEMENTATION;
 } else {
 // on fait un set puis un get. On vérifie ensuite que l'objet
 // qu'on a set est bien celui qu'on get.
 setter.invoke(entityInstance, objectToSet);
 Object resultOfGet = getter.invoke(entityInstance);
 // String msg = "Class " + entityInstance.getClass().getName() +
 // ": one of " + getter.getName() + "()/"
 // +
 // setter.getName()
 // + "() is wrong.\n" +
 // "The getter do not return what the setter set.";
 // if (!type.isPrimitive()) {
 // Assert.assertTrue(msg, resultOfGet == objectToSet);
 // } else {
 // Assert.assertEquals(msg, objectToSet, resultOfGet);
 // }
 if ((!type.isPrimitive() && resultOfGet != objectToSet)
 || (type.isPrimitive() && !resultOfGet
 .equals(objectToSet))) {
 LOGGER.warn("Class " + entityInstance.getClass().getName()
 + ": one of " + getter.getName() + "()/"
 + setter.getName() + "() is wrong.\n"
 + "The getter do not return what the setter set.");
 // AssertEquals(monObjetGet, monObjetSet);
 result = TestResultType.TESTED_AND_FAILED;

 } else {
 LOGGER.debug("!!! successfully tested {}", field.getName());
 result = TestResultType.TESTED_AND_SUCCEEDED;
 }
 }
 } catch (IllegalAccessException e) {
 LOGGER.warn(e.getMessage(), e);
 } catch (IllegalArgumentException e) {
 LOGGER.warn(e.getMessage(), e);
 } catch (InvocationTargetException e) {
 LOGGER.warn(e.getMessage(), e);
 } catch (SecurityException e) {
 LOGGER.warn(e.getMessage(), e);
 }
 return result;
 }

 /**
 * Crée une instance de l'objet de type type ou fournis un objet par défaut
 * si c'est une primitive, une enum, etc...
 * 
 * @param type
 * le type
 * @return une instance/une primitive/une enum
 */
 protected Object createInstanceOfType(Class <?> type) {
 Object objectToSet = null;
 try {
 // si c'est une enum, on retourne la 1ere constante de l'enum
 if (type.isEnum()) {
 List <?> enumConstants = Arrays.asList(type.getEnumConstants());
 objectToSet = enumConstants.get(0);
 }
 // si c'est une primitive ou une boxed primitive, on utilise un
 // objet par défaut
 else if (type.isPrimitive() || typeIsBoxedPrimitive(type)) {
 objectToSet = PRIMITIVES_TO_USE.get(type);
 if (objectToSet == null) {
 LOGGER.warn("No primitive to use for {}", type);
 }
 }
 // si c'est une interface, on utilise une implémentation par défaut
 else if (type.isInterface()) {
 Class <?> typeImp = IMPLEMENTATIONS_TO_USE.get(type);
 if (typeImp == null) {
 LOGGER.warn("No implementation defined for {}", type);
 }
 objectToSet = typeImp.newInstance();
 }
 // sinon, on invoke le constructeur par défaut
 else {
 objectToSet = tryToInstantiateClass(type);
 }
 // pire cas de figure : whitebox
 if (objectToSet == null) {
 objectToSet = Whitebox.newInstance(type);
 }
 } catch (IllegalArgumentException e) {
 LOGGER.warn(e.getMessage(), e);
 } catch (InstantiationException e) {
 LOGGER.warn(e.getMessage(), e);
 } catch (IllegalAccessException e) {
 LOGGER.warn(e.getMessage(), e);
 }
 return objectToSet;
 }

 private Object tryToInstantiateClass(Class <?> type) {
 Object instance = null;
 Constructor <?>[] constructors = type.getDeclaredConstructors();

 // Test every constructor
 for (Constructor <?> constructor : constructors) {

 constructor.setAccessible(true);
 Class <?>[] paramTypes = constructor.getParameterTypes();

 try {
 // Constructor w/ params
 List <Object> params = new ArrayList <Object>();
 for (Class <?> paramType : paramTypes) {
 params.add(paramType.getDeclaredConstructor().newInstance());
 }
 instance = constructor.newInstance(params.toArray());
 } catch (NoSuchMethodException | InstantiationException
 | IllegalAccessException | IllegalArgumentException
 | InvocationTargetException | SecurityException e) {
 LOGGER.debug("Could not instantiate {} with {} ",
 type.getName(), constructor.getName());
 }
 }
 return instance;
 }

 /**
 * Type est un type primitif
 * 
 * @param type
 * le type
 * @return Type est un type primitif
 */
 private boolean typeIsBoxedPrimitive(Class <?> type) {
 return BOXED_PRIMITIVES.contains(type);
 }

 /**
 * Trouve le setter pour un attribut d'une entitée
 * 
 * @param entity
 * la classe de l'entité
 * @param field
 * l'attribut
 * @return le setter ou null si non trouvé
 */
 private Method findSetter(Class <?> entity, Field field) {
 for (String setterPrefix : POSSIBLE_SETTER_PREFIXES) {
 try {
 String setterToTry = setterPrefix
 + capitalizeFirstLetter(field.getName());
 LOGGER.debug("Trying setter {}", setterToTry);
 Method setter = entity.getMethod(setterToTry, field.getType());
 return setter;
 } catch (SecurityException e) {
 LOGGER.warn("Security exception for class {}", entity.getName());
 } catch (NoSuchMethodException e) {
 LOGGER.debug("No setter found");
 }
 }
 return null;
 }

 /**
 * Renvoie la string avec la première lettre en majuscule
 * 
 * @param str
 * la string
 * @return string avec la première lettre en majuscule
 */
 private String capitalizeFirstLetter(String str) {

 if (str.length() == 0) {
 return str;
 } else if (str.length() == 1) {
 return String.valueOf(Character.toUpperCase(str.charAt(0)));
 }
 return Character.toUpperCase(str.charAt(0)) + str.substring(1);
 }

 /**
 * Trouve le getter pour un attribut d'une entitée
 * 
 * @param entity
 * la classe de l'entité
 * @param field
 * l'attribut
 * @return le getter ou null si non trouvé
 */
 private Method findGetter(Class <?> entity, Field field) {
 for (String getterPrefix : POSSIBLE_GETTER_PREFIXES) {
 try {
 String getterToTry = getterPrefix
 + capitalizeFirstLetter(field.getName());
 LOGGER.debug("Trying getter {}", getterToTry);
 Method getter = entity.getMethod(getterToTry);
 return getter;
 } catch (SecurityException e) {
 LOGGER.warn("Security exception for class {}", entity.getName());
 } catch (NoSuchMethodException e) {
 LOGGER.debug("No setter found");
 }
 }
 return null;
 }

 /**
 * Collecte toutes les entités du package
 * 
 * @param pkg
 * le pkg de domain
 * @return les entités collectées
 */
 private List <Class <?>> collectAllEntities(String pkg, TypeTest typeTest) {
 List <Class <?>> entitiesToTest = new ArrayList <Class <?>>();

 try {
 List <Class <?>> classes = getClasses(pkg);

 for (Class <?> potentialEntity : classes) {
 LOGGER.debug("Potential entity : " + potentialEntity.getName());
 if (TypeTest.Entities.equals(typeTest)
 && potentialEntity.getAnnotation(Entity.class) != null) {
 LOGGER.debug(" ->>>> this is an Entity");
 entitiesToTest.add(potentialEntity);
 } else if (TypeTest.Representations.equals(typeTest)
 && potentialEntity.getSimpleName().endsWith(
 "Representation")) {
 LOGGER.debug(" ->>>> this is a Representation");
 entitiesToTest.add(potentialEntity);
 } else if (TypeTest.Dto.equals(typeTest)
 && potentialEntity.getSimpleName().endsWith("Dto")) {
 LOGGER.debug(" ->>>> this is a Dto");
 entitiesToTest.add(potentialEntity);
 } else if (TypeTest.Vo.equals(typeTest)
 && potentialEntity.getAnnotation(Embeddable.class) != null) {
 LOGGER.debug(" ->>>> this is a Vo");
 entitiesToTest.add(potentialEntity);
 }
 }
 } catch (ClassNotFoundException | IOException e) {
 Assert.fail("Unable to scan package " + pkg);
 LOGGER.error("Unable to scan package.", e);
 }
 return entitiesToTest;
 }

 private static List <Class <?>> getClasses(String packageName)
 throws ClassNotFoundException, IOException {
 ClassLoader classLoader = Thread.currentThread()
 .getContextClassLoader();
 Assert.assertNotNull(classLoader);
 String path = packageName.replace('.', '/');
 Enumeration <URL> resources = classLoader.getResources(path);
 List <File> dirs = new ArrayList <File>();
 while (resources.hasMoreElements()) {
 URL resource = resources.nextElement();
 dirs.add(new File(resource.getFile()));
 }
 ArrayList <Class <?>> classes = new ArrayList <Class <?>>();
 for (File directory : dirs) {
 classes.addAll(findClasses(directory, packageName));
 }
 return classes;
 }

 /**
 * Recursive method used to find all classes in a given directory and
 * subdirs.
 * 
 * @param directory
 * The base directory
 * @param packageName
 * The package name for classes found inside the base directory
 * @return The classes
 * @throws ClassNotFoundException
 */
 private static List <Class <?>> findClasses(File directory, String packageName)
 throws ClassNotFoundException {
 List <Class <?>> classes = new ArrayList <Class <?>>();
 if (!directory.exists()) {
 return classes;
 }
 File[] files = directory.listFiles();
 for (File file : files) {
 if (file.isDirectory()) {
 Assert.assertFalse(file.getName().contains("."));
 classes.addAll(findClasses(file,
 packageName + "." + file.getName()));
 } else if (file.getName().endsWith(".class")) {
 try {
 classes.add(Class.forName(packageName
 + '.'
 + file.getName().substring(0,
 file.getName().length() - 6)));
 } catch (Throwable e) {
 LOGGER.warn("Could not initialize {}", file.getName());
 }
 }
 }
 return classes;
 }
}

Clase Utilitaria para Test Unitarios

Siempre es interesante contar con una clase utilitaria que nos permita ahorrar lineas de código, incluso en los test unitarios. Por esta razón, facilito esta clase que permite hacer validaciones de una forma fácil y sencilla

 


package com.hector;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

import org.junit.Assert;

import com.hector.TechnicalException;

public abstract class ManagerTest {
    public void superficialEnumCodeCoverageundefinedfinal Class<? extends Enum<?>> enumClass) {
        try {
            for undefinedObject o : undefinedObject[]) enumClass.getMethodundefined"values").invokeundefinednull)) {
                enumClass.getMethodundefined"valueOf", String.class).invokeundefinednull, o.toStringundefined));
            }
        } catch undefinedThrowable e) {
            throw new PEDTechnicalExceptionundefinede);
        }
    }

    public void shouldValidateThrowsExceptionWithMessageundefinedfinal Exception e, final String message) {
        Assert.assertNotNullundefinede);
        Assert.assertTrueundefinede.getMessageundefined).startsWithundefinedmessage));
    }

    public void callPrivateConstructorsForCodeCoverageundefinedfinal Class<?> class1) throws SecurityException, NoSuchMethodException,
            IllegalArgumentException, InstantiationException, IllegalAccessException, InvocationTargetException {
        Class<?>[] classesToConstruct = { class1 };
        for undefinedClass<?> clazz : classesToConstruct) {
            Constructor<?> constructor = clazz.getDeclaredConstructorundefined);
            constructor.setAccessibleundefinedtrue);
            Assert.assertNotNullundefinedconstructor.newInstanceundefined));
        }
    }

    public void assertUtilityClassWellDefinedundefinedfinal Class<?> clazz) throws NoSuchMethodException, InvocationTargetException, InstantiationException,
            IllegalAccessException {
        Assert.assertTrueundefined"class must be final", Modifier.isFinalundefinedclazz.getModifiersundefined)));
        Assert.assertEqualsundefined"There must be only one constructor", 1, clazz.getDeclaredConstructorsundefined).length);
        final Constructor<?> constructor = clazz.getDeclaredConstructorundefined);
        if undefinedconstructor.isAccessibleundefined) || !Modifier.isPrivateundefinedconstructor.getModifiersundefined))) {
            Assert.failundefined"constructor is not private");
        }
        constructor.setAccessibleundefinedtrue);
        constructor.newInstanceundefined);
        constructor.setAccessibleundefinedfalse);
        for undefinedfinal Method method : clazz.getMethodsundefined)) {
            if undefined!Modifier.isStaticundefinedmethod.getModifiersundefined)) && method.getDeclaringClassundefined).equalsundefinedclazz)) {
                Assert.failundefined"there exists a non-static method:" + method);
            }
        }
    }
}