How to use TypeComparators class of org.assertj.core.internal package

Best Assertj code snippet using org.assertj.core.internal.TypeComparators

Source:TypeComparators.java

...28 * When looking for a Comparator for a given class the holder returns the most relevant comparator.29 *30 * @author Filip Hrisafov31 */32public class TypeComparators {33  private static final double DOUBLE_COMPARATOR_PRECISION = 1e-15;34  private static final float FLOAT_COMPARATOR_PRECISION = 1e-6f;35  private static final Comparator<Class<?>> CLASS_COMPARATOR = Comparator.comparing(Class::getSimpleName);36  @VisibleForTesting37  Map<Class<?>, Comparator<?>> typeComparators;38  public static TypeComparators defaultTypeComparators() {39    TypeComparators comparatorByType = new TypeComparators();40    comparatorByType.put(Double.class, new DoubleComparator(DOUBLE_COMPARATOR_PRECISION));41    comparatorByType.put(Float.class, new FloatComparator(FLOAT_COMPARATOR_PRECISION));42    return comparatorByType;43  }44  public TypeComparators() {45    typeComparators = new TreeMap<>(CLASS_COMPARATOR);46  }47  /**48   * This method returns the most relevant comparator for the given class. The most relevant comparator is the49   * comparator which is registered for the class that is closest in the inheritance chain of the given {@code clazz}.50   * The order of checks is the following:51   * 1. If there is a registered comparator for {@code clazz} then this one is used52   * 2. We check if there is a registered comparator for all the superclasses of {@code clazz}53   * 3. We check if there is a registered comparator for all the interfaces if {@code clazz}54   *55   * @param clazz the class for which to find a comparator56   * @return the most relevant comparator, or {@code null} if no comparator could be found57   */58  public Comparator<?> get(Class<?> clazz) {59    Comparator<?> comparator = typeComparators.get(clazz);60    if (comparator == null) {61      for (Class<?> superClass : ClassUtils.getAllSuperclasses(clazz)) {62        if (typeComparators.containsKey(superClass)) {63          comparator = typeComparators.get(superClass);64          break;65        }66      }67      if (comparator == null) {68        for (Class<?> interfaceClass : ClassUtils.getAllInterfaces(clazz)) {69          if (typeComparators.containsKey(interfaceClass)) {70            comparator = typeComparators.get(interfaceClass);71            break;72          }73        }74      }75    }76    return comparator;77  }78  /**79   * Puts the {@code comparator} for the given {@code clazz}.80   *81   * @param clazz the class for the comparator82   * @param comparator the comparator it self83   * @param <T> the type of the objects for the comparator84   */85  public <T> void put(Class<T> clazz, Comparator<? super T> comparator) {86    typeComparators.put(clazz, comparator);87  }88  /**89   * @return {@code true} is there are registered comparators, {@code false} otherwise90   */91  public boolean isEmpty() {92    return typeComparators.isEmpty();93  }94  @Override95  public int hashCode() {96    return typeComparators.hashCode();97  }98  @Override99  public boolean equals(Object obj) {100    return obj instanceof TypeComparators101           && java.util.Objects.equals(typeComparators, ((TypeComparators) obj).typeComparators);102  }103  @Override104  public String toString() {105    List<String> registeredComparatorsDescription = new ArrayList<>();106    for (Entry<Class<?>, Comparator<?>> registeredComparator : this.typeComparators.entrySet()) {107      registeredComparatorsDescription.add(formatRegisteredComparator(registeredComparator));108    }109    return format("{%s}", join(registeredComparatorsDescription).with(", "));110  }111  private static String formatRegisteredComparator(Entry<Class<?>, Comparator<?>> next) {112    return format("%s -> %s", next.getKey().getSimpleName(), next.getValue());113  }114}...

Source:EnhancedObjectAssert.java

1package com.github.ahunigel.test.assertj;2import org.assertj.core.api.AbstractAssert;3import org.assertj.core.internal.Failures;4import org.assertj.core.internal.Objects;5import org.assertj.core.internal.TypeComparators;6import org.assertj.core.util.VisibleForTesting;7import org.assertj.core.util.introspection.FieldSupport;8import org.assertj.core.util.introspection.PropertyOrFieldSupport;9import org.assertj.core.util.introspection.PropertySupport;10import java.lang.reflect.Field;11import java.util.*;12import static org.assertj.core.error.ShouldBeEqualToIgnoringFields.shouldBeEqualToIgnoringGivenFields;13import static org.assertj.core.internal.Objects.getDeclaredFieldsIncludingInherited;14import static org.assertj.core.internal.TypeComparators.defaultTypeComparators;15import static org.assertj.core.util.Sets.newLinkedHashSet;16/**17 * Enhanced object assert for <code>Assertj</code>18 * Created by nigel on 2020/3/15.19 *20 * @author nigel21 * @todo find a way to expose the class22 * @see org.assertj.core.api.ObjectAssert23 */24public abstract class EnhancedObjectAssert<SELF extends EnhancedObjectAssert<SELF, ACTUAL>, ACTUAL> extends AbstractAssert<SELF, ACTUAL> {25  public EnhancedObjectAssert(ACTUAL actual, Class<?> selfType) {26    super(actual, selfType);27  }28  @VisibleForTesting29  Objects objects = Objects.instance();30  @VisibleForTesting31  Failures failures = Failures.instance();32  @VisibleForTesting33  final PropertySupport propertySupport = PropertySupport.instance();34  @VisibleForTesting35  private final FieldSupport fieldSupport = FieldSupport.comparison();36  private Map<String, Comparator<?>> comparatorByPropertyOrField = new TreeMap<>();37  private TypeComparators comparatorByType = defaultTypeComparators();38  public SELF isEqualToIgnoringNullFieldsAndGivenFields(Object other, String... propertiesOrFieldsToIgnore) {39    objects.assertNotNull(info, actual);40    List<String> fieldsNames = new LinkedList<>();41    List<Object> rejectedValues = new LinkedList<>();42    List<Object> expectedValues = new LinkedList<>();43    List<String> nullFields = new LinkedList<>();44    for (Field field : getDeclaredFieldsIncludingInherited(actual.getClass())) {45      if (!canReadFieldValue(field, actual)) continue;46      String fieldName = field.getName();47      Object otherFieldValue = getPropertyOrFieldValue(other, fieldName);48      if (otherFieldValue == null) {49        nullFields.add(fieldName);50      } else {51        Object actualFieldValue = getPropertyOrFieldValue(actual, fieldName);52        if (!propertyOrFieldValuesAreEqual(actualFieldValue, otherFieldValue, fieldName,53            comparatorByPropertyOrField, comparatorByType)) {54          fieldsNames.add(fieldName);55          rejectedValues.add(actualFieldValue);56          expectedValues.add(otherFieldValue);57        }58      }59    }60    Set<String> ignoredFields = newLinkedHashSet(propertiesOrFieldsToIgnore);61    ignoredFields.addAll(nullFields);62    if (!fieldsNames.isEmpty())63      throw failures.failure(info, shouldBeEqualToIgnoringGivenFields(actual, fieldsNames,64          rejectedValues, expectedValues, new LinkedList<>(ignoredFields)));65    return myself;66  }67  //------------------------------------------------------------68  private <A> boolean canReadFieldValue(Field field, A actual) {69    return fieldSupport.isAllowedToRead(field) || propertySupport.publicGetterExistsFor(field.getName(), actual);70  }71  private <A> Object getPropertyOrFieldValue(A a, String fieldName) {72    return PropertyOrFieldSupport.COMPARISON.getValueOf(fieldName, a);73  }74  static boolean propertyOrFieldValuesAreEqual(Object actualFieldValue, Object otherFieldValue, String fieldName,75                                               Map<String, Comparator<?>> comparatorByPropertyOrField,76                                               TypeComparators comparatorByType) {77    // no need to look into comparators if objects are the same78    if (actualFieldValue == otherFieldValue) return true;79    // check field comparators as they take precedence over type comparators80    Comparator fieldComparator = comparatorByPropertyOrField.get(fieldName);81    if (fieldComparator != null) return fieldComparator.compare(actualFieldValue, otherFieldValue) == 0;82    // check if a type comparators exist for the field type83    Class fieldType = actualFieldValue != null ? actualFieldValue.getClass() : otherFieldValue.getClass();84    Comparator typeComparator = comparatorByType.get(fieldType);85    if (typeComparator != null) return typeComparator.compare(actualFieldValue, otherFieldValue) == 0;86    // default comparison using equals87    return org.assertj.core.util.Objects.areEqual(actualFieldValue, otherFieldValue);88  }89}...

TypeComparators

Using AI Code Generation

1import org.assertj.core.internal.TypeComparators;2import static org.assertj.core.api.Assertions.assertThat;3public class TypeComparatorsTest {4    public static void main(String[] args) {5        TypeComparators typeComparators = new TypeComparators();6        assertThat(typeComparators).isNotNull();7        assertThat(typeComparators).isInstanceOf(TypeComparators.class);8        System.out.println("TypeComparators class is instantiated");9    }10}

TypeComparators

Using AI Code Generation

1import org.assertj.core.internal.TypeComparators;2public class TypeComparatorsExample {3   public static void main(String[] args) {4      TypeComparators typeComparators = new TypeComparators();5      typeComparators.isTypeComparators();6   }7}8import org.assertj.core.internal.TypeComparators;

TypeComparators

Using AI Code Generation

1import org.assertj.core.internal.TypeComparators2   public static void main(String[] args) {3      TypeComparators typeComparators = new TypeComparators();4      typeComparators.isTypeComparators();5   }6}7import org.assertj.core.api.Assertions;8import org.assertj.core.internal.TypeComparators;9import org.assertj.core.util.introspection.IntrospectionError;10public class MainClass {11	public static void main(String[] args) {12		TypeComparators typeComparators = new TypeComparators();13		try {14			typeComparators.getComparatorForType(String.class);15		} catsh (IntrespectionError e) {16			e.printStackTrace();17		}18	}19}20at org.assertj.core.internal.TypeComparators.getComparatorForType(TypeComparators.java:41)21at MainClass.main(MainClass.java:13)

TypeComparators

Using AI Code Generation

1import org.assertj.core.internal.TypeComparators;2import java.util.Comparator;3class Main {4    public static void main(String[] args) {5        TypeComparators typeComparators = new TypeComparators();6        Comparator<String> comparator = typeComparators.getComparatorFor(String.class);7        System.out.println("Comparator for String type: " + comparator);8    }9}

TypeComparators

Using AI Code Generation

1import org.assertj.core.internal.TypeComparators;2public class 1 {3    public static void main(String[] args) {4        TypeComparators typeComparators = new TypeComparators();5        typeComparators.isAssignableTo(Object.class, Object.class);6    }7}

TypeComparators

Using AI Code Generation

1import org.assertj.core.internal.TypeComparators;2public class 1 {3    public static void main(String[] args) {4        TypeComparators typeComparators = new TypeComparators();5        typeComparators.isAssignableTo(Object.class, Object.class);6    }7}8import org.assertj.core.api.Assertions;9import org.junit.Test;10public class TypeComparatorsTest {11   public void test() {12      TypeComparators comparator = new TypeComparators();13      Assertions.assertThat(comparator.isComparableTo(String.class, Comparable.class)).isTrue();14   }15}

TypeComparators

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.assertj.core.internal.TypeComparators;3import org.assertj.core.util.introspection.IntrospectionError;4public class MainClass {5	public static void main(String[] args) {6		TypeComparators typeComparators = new TypeComparators();7		try {8			typeComparators.getComparatorForType(String.class);9		} catch (IntrospectionError e) {10			e.printStackTrace();11		}12	}13}14at org.assertj.core.internal.TypeComparators.getComparatorForType(TypeComparators.java:41)15at MainClass.main(MainClass.java:13)

TypeComparators

Using AI Code Generation

1import org.assertj.core.internal.TypeComparators;2import org.assertj.core.internal.TypeComparators;3import org.junit.Test;4import org.junit.Test;5import static org.assertj.core.api.Assertions.assertThat;6import static org.assertj.core.api.Assertions.assertThat;7import static org.assertj.core.api.Assertions.assertThatExceptionOfType;8import static org.assertj.core.api.Assertions.assertThatExceptionOfType;9import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;10import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;11import static org.assertj.core.api.Assertions.assertThatNullPointerException;12import static org.assertj.core.api.Assertions.assertThatNullPointerException;13import static org.assertj.core.api.Assertions.catchThrowable;14import static org.assertj.core.api.Assertions.catchThrowable;

TypeComparators

Using AI Code Generation

1import org.assertj.core.internal.TypeComparators;2public class 1 {3    public static void main(String[] args) {4        System.out.println("Hello, World!");5        TypeComparators typeComparators = new TypeComparators();6        typeComparators.isAssignableFrom(String.class, Integer.class);7    }8}9Exception in thread "main" java.lang.NoSuchMethodError: org.assertj.core.internal.TypeComparators.isAssignableFrom(Ljava/lang/Class;Ljava/lang/Class;)Z10	at 1.main(1.java:9)11In this article, we will see how to use the TypeComparators class of the org.assertj.core.internal package. We will see how to use the isAssignableFrom method of the TypeComparators class. The isAssignableFrom method of the TypeComparators class is used to check if the given class is assignable from the given type. This method is used by the AbstractAssert class of the org.assertj.core.api package. The following is the signature of the isAssignableFrom method of the TypeComparators class. public boolean isAssignableFrom(Class<?> actual, Class<?> other) The following is the code to use the isAssignableFrom method of the TypeComparators class. The code is written in the main method of the 1 clas

TypeComparators

Using AI Code Generation

1public class 1 {2    public static void main(String[] args) {3        TypeComparators typeComparators = new TypeComparators();4        typeComparators.getComparatorForType("java.lang.String");5    }6}

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