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How to use getDifferences method of org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator class

Best Assertj code snippet using org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator.getDifferences

Source:RecursiveComparisonDifferenceCalculator.java

...74    void addDifference(DualValue dualValue, String description, Object... args) {75      differences.add(new ComparisonDifference(dualValue.getPath(), dualValue.actual, dualValue.expected,76                                               format(description, args)));77    }78    public List<ComparisonDifference> getDifferences() {79      Collections.sort(differences);80      return differences;81    }82    public boolean hasDualValuesToCompare() {83      return !dualValuesToCompare.isEmpty();84    }85    public DualValue pickDualValueToCompare() {86      final DualValue dualValue = dualValuesToCompare.removeFirst();87      if (dualValue.hasPotentialCyclingValues()) {88        // visited dual values are here to avoid cycle, java types don't have cycle, there is no need to track them.89        // moreover this would make should_fix_1854_minimal_test to fail (see the test for a detailed explanation)90        visitedDualValues.add(dualValue);91      }92      return dualValue;93    }94    private void registerForComparison(DualValue dualValue) {95      if (!visitedDualValues.contains(dualValue)) dualValuesToCompare.addFirst(dualValue);96    }97    private void initDualValuesToCompare(Object actual, Object expected, List<String> parentPath, boolean isRootObject) {98      DualValue dualValue = new DualValue(parentPath, actual, expected);99      boolean mustCompareFieldsRecursively = mustCompareFieldsRecursively(isRootObject, dualValue);100      if (dualValue.hasNoNullValues() && dualValue.hasNoContainerValues() && mustCompareFieldsRecursively) {101        // disregard the equals method and start comparing fields102        Set<String> nonIgnoredActualFieldsNames = recursiveComparisonConfiguration.getNonIgnoredActualFieldNames(dualValue);103        if (!nonIgnoredActualFieldsNames.isEmpty()) {104          // fields to ignore are evaluated when adding their corresponding dualValues to dualValuesToCompare which filters105          // ignored fields according to recursiveComparisonConfiguration106          Set<String> expectedFieldsNames = getFieldsNames(expected.getClass());107          if (expectedFieldsNames.containsAll(nonIgnoredActualFieldsNames)) {108            // we compare actual fields vs expected, ignoring expected additional fields109            for (String nonIgnoredActualFieldName : nonIgnoredActualFieldsNames) {110              DualValue fieldDualValue = new DualValue(parentPath, nonIgnoredActualFieldName,111                                                       COMPARISON.getSimpleValue(nonIgnoredActualFieldName, actual),112                                                       COMPARISON.getSimpleValue(nonIgnoredActualFieldName, expected));113              dualValuesToCompare.addFirst(fieldDualValue);114            }115          } else {116            dualValuesToCompare.addFirst(dualValue);117          }118        } else {119          dualValuesToCompare.addFirst(dualValue);120        }121      } else {122        dualValuesToCompare.addFirst(dualValue);123      }124      // We need to remove already visited fields pair to avoid infinite recursion in case125      // parent -> set{child} with child having a reference back to parent126      // it occurs to unordered collection where we compare all possible combination of the collection elements recursively127      // --128      // remove visited values one by one, DualValue.equals correctly compare respective actual and expected fields by reference129      visitedDualValues.forEach(visitedDualValue -> dualValuesToCompare.stream()130                                                                       .filter(dualValueToCompare -> dualValueToCompare.equals(visitedDualValue))131                                                                       .findFirst()132                                                                       .ifPresent(dualValuesToCompare::remove));133    }134    private boolean mustCompareFieldsRecursively(boolean isRootObject, DualValue dualValue) {135      boolean noCustomComparisonForDualValue = !recursiveComparisonConfiguration.hasCustomComparator(dualValue)136                                               && !shouldHonorOverriddenEquals(dualValue, recursiveComparisonConfiguration);137      return isRootObject || noCustomComparisonForDualValue;138    }139  }140  /**141   * Compare two objects for differences by doing a 'deep' comparison. This will traverse the142   * Object graph and perform either a field-by-field comparison on each143   * object (if not .equals() method has been overridden from Object), or it144   * will call the customized .equals() method if it exists.145   * <p>146   *147   * This method handles cycles correctly, for example A-&gt;B-&gt;C-&gt;A.148   * Suppose a and a' are two separate instances of the A with the same values149   * for all fields on A, B, and C. Then a.deepEquals(a') will return an empty list. It150   * uses cycle detection storing visited objects in a Set to prevent endless151   * loops.152   *153   * @param actual Object one to compare154   * @param expected Object two to compare155   * @param recursiveComparisonConfiguration the recursive comparison configuration156   * @return the list of differences found or an empty list if objects are equivalent.157   *         Equivalent means that all field values of both subgraphs are the same,158   *         either at the field level or via the respectively encountered overridden159   *         .equals() methods during traversal.160   */161  public List<ComparisonDifference> determineDifferences(Object actual, Object expected,162                                                         RecursiveComparisonConfiguration recursiveComparisonConfiguration) {163    if (recursiveComparisonConfiguration.isInStrictTypeCheckingMode() && expectedTypeIsNotSubtypeOfActualType(actual, expected)) {164      return list(expectedAndActualTypeDifference(actual, expected));165    }166    List<String> rootPath = list();167    List<DualValue> visited = list();168    return determineDifferences(actual, expected, rootPath, true, visited, recursiveComparisonConfiguration);169  }170  // TODO keep track of ignored fields in an RecursiveComparisonExecution class ?171  private static List<ComparisonDifference> determineDifferences(Object actual, Object expected, List<String> parentPath,172                                                                 boolean isRootObject, List<DualValue> visited,173                                                                 RecursiveComparisonConfiguration recursiveComparisonConfiguration) {174    ComparisonState comparisonState = new ComparisonState(visited, recursiveComparisonConfiguration);175    comparisonState.initDualValuesToCompare(actual, expected, parentPath, isRootObject);176    while (comparisonState.hasDualValuesToCompare()) {177      final DualValue dualValue = comparisonState.pickDualValueToCompare();178      final List<String> currentPath = dualValue.getPath();179      final Object actualFieldValue = dualValue.actual;180      final Object expectedFieldValue = dualValue.expected;181      if (actualFieldValue == expectedFieldValue) continue;182      // Custom comparators take precedence over all other types of comparison183      if (recursiveComparisonConfiguration.hasCustomComparator(dualValue)) {184        if (!propertyOrFieldValuesAreEqual(dualValue, recursiveComparisonConfiguration)) comparisonState.addDifference(dualValue);185        // since we used a custom comparator we don't need to inspect the nested fields any further186        continue;187      }188      if (actualFieldValue == null || expectedFieldValue == null) {189        // one of the value is null while the other is not as we already know that actualFieldValue != expectedFieldValue190        comparisonState.addDifference(dualValue);191        continue;192      }193      if (dualValue.isExpectedAnEnum()) {194        compareAsEnums(dualValue, comparisonState, recursiveComparisonConfiguration);195        continue;196      }197      // TODO move hasFieldTypesDifference check into each compareXXX198      if (dualValue.isExpectedFieldAnArray()) {199        compareArrays(dualValue, comparisonState);200        continue;201      }202      // we compare ordered collections specifically as to be matching, each pair of elements at a given index must match.203      // concretely we compare: (col1[0] vs col2[0]), (col1[1] vs col2[1])...(col1[n] vs col2[n])204      if (dualValue.isExpectedFieldAnOrderedCollection()205          && !recursiveComparisonConfiguration.shouldIgnoreCollectionOrder(dualValue)) {206        compareOrderedCollections(dualValue, comparisonState);207        continue;208      }209      if (dualValue.isExpectedFieldAnIterable()) {210        compareUnorderedIterables(dualValue, comparisonState);211        continue;212      }213      if (dualValue.isExpectedFieldAnOptional()) {214        compareOptional(dualValue, comparisonState);215        continue;216      }217      // Compare two SortedMaps taking advantage of the fact that these Maps can be compared in O(N) time due to their ordering218      if (dualValue.isExpectedFieldASortedMap()) {219        compareSortedMap(dualValue, comparisonState);220        continue;221      }222      // Compare two Unordered Maps. This is a slightly more expensive comparison because order cannot be assumed, therefore a223      // temporary Map must be created, however the comparison still runs in O(N) time.224      if (dualValue.isExpectedFieldAMap()) {225        compareUnorderedMap(dualValue, comparisonState);226        continue;227      }228      if (shouldCompareDualValue(recursiveComparisonConfiguration, dualValue)) {229        if (!actualFieldValue.equals(expectedFieldValue)) comparisonState.addDifference(dualValue);230        continue;231      }232      Class<?> actualFieldValueClass = actualFieldValue.getClass();233      Class<?> expectedFieldClass = expectedFieldValue.getClass();234      if (recursiveComparisonConfiguration.isInStrictTypeCheckingMode() && expectedTypeIsNotSubtypeOfActualType(dualValue)) {235        comparisonState.addDifference(dualValue, STRICT_TYPE_ERROR, expectedFieldClass.getName(),236                                      actualFieldValueClass.getName());237        continue;238      }239      Set<String> actualNonIgnoredFieldsNames = recursiveComparisonConfiguration.getNonIgnoredActualFieldNames(dualValue);240      Set<String> expectedFieldsNames = getFieldsNames(expectedFieldClass);241      // Check if expected has more fields than actual, in that case the additional fields are reported as difference242      if (!expectedFieldsNames.containsAll(actualNonIgnoredFieldsNames)) {243        // report missing fields in actual244        Set<String> actualFieldsNamesNotInExpected = newHashSet(actualNonIgnoredFieldsNames);245        actualFieldsNamesNotInExpected.removeAll(expectedFieldsNames);246        String missingFields = actualFieldsNamesNotInExpected.toString();247        String expectedClassName = expectedFieldClass.getName();248        String actualClassName = actualFieldValueClass.getName();249        String missingFieldsDescription = format(MISSING_FIELDS, actualClassName, expectedClassName,250                                                 expectedFieldClass.getSimpleName(), actualFieldValueClass.getSimpleName(),251                                                 missingFields);252        comparisonState.addDifference(dualValue, missingFieldsDescription);253      } else { // TODO remove else to report more diff254        // compare actual's fields against expected :255        // - if actual has more fields than expected, the additional fields are ignored as expected is the reference256        for (String actualFieldName : actualNonIgnoredFieldsNames) {257          if (expectedFieldsNames.contains(actualFieldName)) {258            DualValue newDualValue = new DualValue(currentPath, actualFieldName,259                                                   COMPARISON.getSimpleValue(actualFieldName, actualFieldValue),260                                                   COMPARISON.getSimpleValue(actualFieldName, expectedFieldValue));261            comparisonState.registerForComparison(newDualValue);262          }263        }264      }265    }266    return comparisonState.getDifferences();267  }268  private static boolean shouldCompareDualValue(RecursiveComparisonConfiguration recursiveComparisonConfiguration,269                                                final DualValue dualValue) {270    return !recursiveComparisonConfiguration.shouldIgnoreOverriddenEqualsOf(dualValue)271           && hasOverriddenEquals(dualValue.actual.getClass());272  }273  // avoid comparing enum recursively since they contain static fields which are ignored in recursive comparison274  // this would make different field enum value to be considered the same!275  private static void compareAsEnums(final DualValue dualValue,276                                     ComparisonState comparisonState,277                                     RecursiveComparisonConfiguration recursiveComparisonConfiguration) {278    if (recursiveComparisonConfiguration.isInStrictTypeCheckingMode()) {279      // we can use == for comparison which checks both actual and expected values and types are the same280      if (dualValue.actual != dualValue.expected) comparisonState.addDifference(dualValue);...

getDifferences

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator.getDifferences;3import static org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator.isEqualTo;4import java.util.List;5import org.assertj.core.api.recursive.comparison.Difference;6import org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator;7import org.junit.Test;8public class RecursiveComparisonDifferenceCalculatorTest {9    public void test_getDifferences() {10        RecursiveComparisonDifferenceCalculator calculator = new RecursiveComparisonDifferenceCalculator();11        List<Difference> differences = calculator.getDifferences("a", "b");12        assertThat(differences).hasSize(1);13        assertThat(differences.get(0).toString()).isEqualTo("expected: \"b\" but was: \"a\"");14    }15    public void test_isEqualTo() {16        assertThat(isEqualTo("a", "b")).isFalse();17        assertThat(isEqualTo("a", "a")).isTrue();18    }19}20package org.assertj.core.api.recursive.comparison;21import java.util.ArrayList;22import java.util.List;23import org.assertj.core.api.recursive.comparison.Difference;24import org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator;25public class RecursiveComparisonDifferenceCalculator {26    private final List<Difference> differences = new ArrayList<>();27    public List<Difference> getDifferences(Object actual, Object expected) {28        if (isEqualTo(actual, expected)) {29            return differences;30        }31        differences.add(new Difference(actual, expected));32        return differences;33    }34    public static boolean isEqualTo(Object actual, Object expected) {35        return actual == null ? expected == null : actual.equals(expected);36    }37}38package org.assertj.core.api.recursive.comparison;39public class Difference {40    private final Object actual;41    private final Object expected;42    public Difference(Object actual, Object expected) {43        this.actual = actual;44        this.expected = expected;45    }46    public String toString() {47        return String.format("expected: \"%s\" but was: \"%s\"", expected, actual);48    }49}

getDifferences

Using AI Code Generation

1List<RecursiveComparisonDifference> differences = RecursiveComparisonDifferenceCalculator.getDifferences(actual, expected);2assertThat(differences).isEmpty();3assertThat(actual).usingRecursiveComparison().isEqualTo(expected);4public static List<RecursiveComparisonDifference> getDifferences(Object actual, Object expected)5public static List<RecursiveComparisonDifference> getDifferences(Object actual, Object expected)6public static RecursiveComparisonAssert recursiveComparison(Object actual)7package com.journaldev.assertj.recursive.comparison;8import static org.assertj.core.api.Assertions.assertThat;9import java.util.List;10import org.assertj.core.api.recursive.comparison.RecursiveComparisonDifference;11import org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator;

getDifferences

Using AI Code Generation

1assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);2assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);3assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);4assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);5assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);6assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);7assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);8assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);9assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);10assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);11assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);12assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);13assertThat(actual).usingRecursiveComparison().ignoringFields("id").isEqualTo(expected);

getDifferences

Using AI Code Generation

1import org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator;2import java.util.List;3public class AssertJRecursiveComparisonDifferenceCalculator {4    public static void main(String[] args) {5        List<RecursiveComparisonDifference> differences = RecursiveComparisonDifferenceCalculator.getDifferences(6                new Person("John", 23, "New York"),7                new Person("John", 23, "New York"));8        differences.forEach(System.out::println);9    }10}11RecursiveComparisonDifference{path=, actual=Person{name='John', age=23, address='New York'}, expected=Person{name='John', age=23, address='New York'}}12RecursiveComparisonDifference{path=address, actual=New York, expected=New York}13RecursiveComparisonDifference{path=age, actual=23, expected=23}14RecursiveComparisonDifference{path=name, actual=John, expected=John}

getDifferences

Using AI Code Generation

1import org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator;2import org.assertj.core.api.recursive.comparison.Difference;3public class RecursiveComparisonDifferenceCalculatorGetDifferencesMethod {4    public static void main(String[] args) {5        RecursiveComparisonDifferenceCalculator recursiveComparisonDifferenceCalculator = new RecursiveComparisonDifferenceCalculator();6        Object expected = new Object();7        Object actual = new Object();8        Difference differences = recursiveComparisonDifferenceCalculator.getDifferences(expected, actual);9        System.out.println(differences);10    }11}

getDifferences

Using AI Code Generation

1public class TestRecursiveComparisonDifferenceCalculator {2    public void testGetDifferences() {3        List<String> expected = Arrays.asList("one", "two", "three");4        List<String> actual = Arrays.asList("one", "two", "three", "four");5        List<RecursiveComparisonDifference> differences = getDifferences(expected, actual);6        assertThat(differences).hasSize(1);7        RecursiveComparisonDifference recursiveComparisonDifference = differences.get(0);8        assertThat(recursiveComparisonDifference.getActual()).isEqualTo("four");9        assertThat(recursiveComparisonDifference.getExpected()).isEqualTo(null);10        assertThat(recursiveComparisonDifference.getPath()).isEqualTo("[]");11    }12}13	at org.assertj.core.api.Assertions.fail(Assertions.java:1245)14	at org.assertj.core.api.Assertions.fail(Assertions.java:1214)15	at org.assertj.core.api.AbstractListAssert.hasSize(AbstractListAssert.java:357)16	at com.baeldung.recursive.comparison.TestRecursiveComparisonDifferenceCalculator.testGetDifferences(TestRecursiveComparisonDifferenceCalculator.java:25)

getDifferences

Using AI Code Generation

1import org.assertj.core.api.recursive.comparison.*;2import java.util.*;3public class Main {4    public static void main(String[] args) {5        List<String> expected = Arrays.asList("a", "b", "c");6        List<String> actual = Arrays.asList("a", "b", "d");7        List<RecursiveComparisonDifference> differences = RecursiveComparisonDifferenceCalculator.getDifferences(expected, actual);8        differences.forEach(System.out::println);9    }10}

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