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

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

Source:RecursiveComparisonDifferenceCalculator.java Github

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...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);281 return;282 }283 if (!dualValue.isActualAnEnum()) {284 comparisonState.addDifference(dualValue, differentTypeErrorMessage(dualValue, "an enum"));285 return;286 }287 // both actual and expected are enums288 Enum<?> actualEnum = (Enum<?>) dualValue.actual;289 Enum<?> expectedEnum = (Enum<?>) dualValue.expected;290 // we must only compare actual and expected enum by value but not by type291 if (!actualEnum.name().equals(expectedEnum.name())) comparisonState.addDifference(dualValue);292 }293 private static boolean shouldHonorOverriddenEquals(DualValue dualValue,294 RecursiveComparisonConfiguration recursiveComparisonConfiguration) {295 boolean shouldNotIgnoreOverriddenEqualsIfAny = !recursiveComparisonConfiguration.shouldIgnoreOverriddenEqualsOf(dualValue);296 return shouldNotIgnoreOverriddenEqualsIfAny && dualValue.actual != null && hasOverriddenEquals(dualValue.actual.getClass());297 }298 private static void compareArrays(DualValue dualValue, ComparisonState comparisonState) {299 if (!dualValue.isActualFieldAnArray()) {300 // at the moment we only allow comparing arrays with arrays but we might allow comparing to collections later on301 // but only if we are not in strict type mode.302 comparisonState.addDifference(dualValue, differentTypeErrorMessage(dualValue, "an array"));303 return;304 }305 // both values in dualValue are arrays306 int actualArrayLength = Array.getLength(dualValue.actual);307 int expectedArrayLength = Array.getLength(dualValue.expected);308 if (actualArrayLength != expectedArrayLength) {309 comparisonState.addDifference(dualValue, DIFFERENT_SIZE_ERROR, "arrays", actualArrayLength, expectedArrayLength);310 // no need to inspect elements, arrays are not equal as they don't have the same size311 return;312 }313 // register each pair of actual/expected elements for recursive comparison314 List<String> arrayFieldPath = dualValue.getPath();315 for (int i = 0; i < actualArrayLength; i++) {316 Object actualElement = Array.get(dualValue.actual, i);317 Object expectedElement = Array.get(dualValue.expected, i);318 // TODO add [i] to the path ?319 comparisonState.registerForComparison(new DualValue(arrayFieldPath, actualElement, expectedElement));320 }321 }322 /*323 * Deeply compare two Collections that must be same length and in same order.324 */325 private static void compareOrderedCollections(DualValue dualValue, ComparisonState comparisonState) {326 if (!dualValue.isActualFieldAnOrderedCollection()) {327 // at the moment if expected is an ordered collection then actual should also be one328 comparisonState.addDifference(dualValue, ACTUAL_NOT_ORDERED_COLLECTION, dualValue.actual.getClass().getCanonicalName());329 return;330 }331 Collection<?> actualCollection = (Collection<?>) dualValue.actual;332 Collection<?> expectedCollection = (Collection<?>) dualValue.expected;333 if (actualCollection.size() != expectedCollection.size()) {334 comparisonState.addDifference(dualValue, DIFFERENT_SIZE_ERROR,335 "collections", actualCollection.size(), expectedCollection.size());336 // no need to inspect elements, arrays are not equal as they don't have the same size337 return;338 }339 // register pair of elements with same index for later comparison as we compare elements in order340 Iterator<?> expectedIterator = expectedCollection.iterator();341 List<String> path = dualValue.getPath();342 actualCollection.stream()343 .map(element -> new DualValue(path, element, expectedIterator.next()))344 .forEach(comparisonState::registerForComparison);345 }346 private static String differentTypeErrorMessage(DualValue dualValue, String actualTypeDescription) {347 return format(DIFFERENT_ACTUAL_AND_EXPECTED_FIELD_TYPES,348 actualTypeDescription, dualValue.actual.getClass().getCanonicalName());349 }350 private static void compareUnorderedIterables(DualValue dualValue, ComparisonState comparisonState) {351 if (!dualValue.isActualFieldAnIterable()) {352 // at the moment we only compare iterable with iterables (but we might allow arrays too)353 comparisonState.addDifference(dualValue, differentTypeErrorMessage(dualValue, "an iterable"));354 return;355 }356 Iterable<?> actual = (Iterable<?>) dualValue.actual;357 Iterable<?> expected = (Iterable<?>) dualValue.expected;358 int actualSize = sizeOf(actual);359 int expectedSize = sizeOf(expected);360 if (actualSize != expectedSize) {361 comparisonState.addDifference(dualValue, DIFFERENT_SIZE_ERROR, "collections", actualSize, expectedSize);362 // no need to inspect elements, iterables are not equal as they don't have the same size363 return;364 // TODO instead we could register the diff between expected and actual that is:365 // - unexpected actual elements (the ones not matching any expected)366 // - expected elements not found in actual.367 }368 List<String> path = dualValue.getPath();369 // copy expected as we will remove elements found in actual370 Collection<?> expectedCopy = new LinkedList<>(toCollection(expected));371 for (Object actualElement : actual) {372 // compare recursively actualElement to all remaining expected elements373 Iterator<?> expectedIterator = expectedCopy.iterator();374 while (expectedIterator.hasNext()) {375 Object expectedElement = expectedIterator.next();376 // we need to get the currently visited dual values otherwise a cycle would cause an infinite recursion.377 List<ComparisonDifference> differences = determineDifferences(actualElement, expectedElement, path, false,378 comparisonState.visitedDualValues,379 comparisonState.recursiveComparisonConfiguration);380 if (differences.isEmpty()) {381 // we found an element in expected matching actualElement, we must remove it as if actual matches expected382 // it means for each actual element there is one and only matching expected element.383 expectedIterator.remove();384 // jump to next actual element check385 break;386 }387 }388 }389 // expectedCopy not empty = there was at least one actual element not matching any expected elements.390 if (!expectedCopy.isEmpty()) comparisonState.addDifference(dualValue);391 // TODO instead we could register the diff between expected and actual that is:392 // - unexpected actual elements (the ones not matching any expected)393 // - expected elements not found in actual.394 }395 private static <K, V> void compareSortedMap(DualValue dualValue, ComparisonState comparisonState) {396 if (!dualValue.isActualFieldASortedMap()) {397 // at the moment we only compare iterable with iterables (but we might allow arrays too)398 comparisonState.addDifference(dualValue, differentTypeErrorMessage(dualValue, "a sorted map"));399 return;400 }401 Map<?, ?> actualMap = (Map<?, ?>) dualValue.actual;402 @SuppressWarnings("unchecked")403 Map<K, V> expectedMap = (Map<K, V>) dualValue.expected;404 if (actualMap.size() != expectedMap.size()) {405 comparisonState.addDifference(dualValue, DIFFERENT_SIZE_ERROR, "sorted maps", actualMap.size(), expectedMap.size());406 // no need to inspect entries, maps are not equal as they don't have the same size407 return;408 // TODO instead we could register the diff between expected and actual that is:409 // - unexpected actual entries (the ones not matching any expected)410 // - expected entries not found in actual.411 }412 List<String> path = dualValue.getPath();413 Iterator<Map.Entry<K, V>> expectedMapEntries = expectedMap.entrySet().iterator();414 for (Map.Entry<?, ?> actualEntry : actualMap.entrySet()) {415 Map.Entry<?, ?> expectedEntry = expectedMapEntries.next();416 // Must split the Key and Value so that Map.Entry's equals() method is not used.417 comparisonState.registerForComparison(new DualValue(path, actualEntry.getKey(), expectedEntry.getKey()));418 comparisonState.registerForComparison(new DualValue(path, actualEntry.getValue(), expectedEntry.getValue()));419 }420 }421 private static void compareUnorderedMap(DualValue dualValue, ComparisonState comparisonState) {422 if (!dualValue.isActualFieldAMap()) {423 comparisonState.addDifference(dualValue, differentTypeErrorMessage(dualValue, "a map"));424 return;425 }426 Map<?, ?> actualMap = (Map<?, ?>) dualValue.actual;427 Map<?, ?> expectedMap = (Map<?, ?>) dualValue.expected;428 if (actualMap.size() != expectedMap.size()) {429 comparisonState.addDifference(dualValue, DIFFERENT_SIZE_ERROR, "maps", actualMap.size(), expectedMap.size());430 // no need to inspect entries, maps are not equal as they don't have the same size431 return;432 // TODO instead we could register the diff between expected and actual that is:433 // - unexpected actual entries (the ones not matching any expected)434 // - expected entries not found in actual.435 }436 Map<Integer, Map.Entry<?, ?>> fastLookup = expectedMap.entrySet().stream()437 .collect(toMap(entry -> deepHashCode(entry.getKey()), entry -> entry));438 List<String> path = dualValue.getPath();439 for (Map.Entry<?, ?> actualEntry : actualMap.entrySet()) {440 int deepHashCode = deepHashCode(actualEntry.getKey());441 if (!fastLookup.containsKey(deepHashCode)) {442 // TODO add description of the entry in actual not found in expected.443 comparisonState.addDifference(dualValue);444 return;445 }446 Map.Entry<?, ?> expectedEntry = fastLookup.get(deepHashCode);447 // Must split the Key and Value so that Map.Entry's equals() method is not used.448 comparisonState.registerForComparison(new DualValue(path, actualEntry.getKey(), expectedEntry.getKey()));449 comparisonState.registerForComparison(new DualValue(path, actualEntry.getValue(), expectedEntry.getValue()));450 }451 }452 private static void compareOptional(DualValue dualValue, ComparisonState comparisonState) {453 if (!dualValue.isActualFieldAnOptional()) {454 comparisonState.addDifference(dualValue, differentTypeErrorMessage(dualValue, "an Optional"));455 return;456 }457 Optional<?> actual = (Optional<?>) dualValue.actual;458 Optional<?> expected = (Optional<?>) dualValue.expected;459 if (actual.isPresent() != expected.isPresent()) {460 comparisonState.addDifference(dualValue);461 return;462 }463 // either both are empty or present464 if (!actual.isPresent()) return; // both optional are empty => end of the comparison465 // both are present, we have to compare their values recursively466 Object value1 = actual.get();467 Object value2 = expected.get();468 // we add VALUE_FIELD_NAME to the path since we register Optional.value fields.469 comparisonState.registerForComparison(new DualValue(dualValue.getPath(), VALUE_FIELD_NAME, value1, value2));470 }471 /**472 * Determine if the passed in class has a non-Object.equals() method. This473 * method caches its results in static ConcurrentHashMap to benefit474 * execution performance.475 *476 * @param c Class to check.477 * @return true, if the passed in Class has a .equals() method somewhere478 * between itself and just below Object in it's inheritance.479 */480 static boolean hasOverriddenEquals(Class<?> c) {481 if (customEquals.containsKey(c)) {482 return customEquals.get(c);483 }...

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registerForComparison

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1import static java.util.Collections.singletonMap;2import static org.assertj.core.api.Assertions.assertThat;3import static org.assertj.core.api.Assertions.withinPercentage;4import static org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator.registerForComparison;5import java.util.Map;6import org.assertj.core.api.recursive.comparison.RecursiveComparisonConfiguration;7import org.assertj.core.data.Offset;8import org.junit.jupiter.api.Test;9public class RecursiveComparisonDifferenceCalculatorTest {10 public void should_compare_using_a_custom_comparator() {11 registerForComparison(Map.class, (actual, expected) -> {12 if (actual.size() != expected.size()) {13 return false;14 }15 for (Map.Entry<?, ?> entry : actual.entrySet()) {16 if (!expected.containsKey(entry.getKey())) {17 return false;18 }19 if (!expected.get(entry.getKey()).equals(entry.getValue())) {20 return false;21 }22 }23 return true;24 });25 Map<String, String> actual = singletonMap("key", "value");26 Map<String, String> expected = singletonMap("key", "value");27 assertThat(actual).usingRecursiveComparison().isEqualTo(expected);28 }29 public void should_compare_using_a_custom_comparator_with_configuration() {30 registerForComparison(Map.class, (actual, expected) -> {31 if (actual.size() != expected.size()) {32 return false;33 }34 for (Map.Entry<?, ?> entry : actual.entrySet()) {35 if (!expected.containsKey(entry.getKey())) {36 return false;37 }38 if (!expected.get(entry.getKey()).equals(entry.getValue())) {39 return false;40 }41 }42 return true;43 });44 Map<String, String> actual = singletonMap("key", "value");45 Map<String, String> expected = singletonMap("key", "value");46 RecursiveComparisonConfiguration configuration = RecursiveComparisonConfiguration.builder()47 .withStrictTypeChecking(false)48 .build();49 assertThat(actual).usingRecursiveComparison(configuration).isEqualTo(expected);50 }51 public void should_compare_using_a_custom_comparator_with_offset() {52 registerForComparison(Double.class, (actual, expected) -> Math.abs(expected - actual) < 0.00000001);53 Double actual = 1.0;

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1 public static void registerForComparison(Class<?> clazz) {2 RecursiveComparisonDifferenceCalculator.registerForComparison(clazz);3 }4 public static void registerForComparison(Class<?> clazz, RecursiveComparisonConfiguration config) {5 RecursiveComparisonDifferenceCalculator.registerForComparison(clazz, config);6 }7 public static void registerForComparison(Class<?> clazz, RecursiveComparisonConfiguration config, RecursiveComparisonConfiguration... configs) {8 RecursiveComparisonDifferenceCalculator.registerForComparison(clazz, config, configs);9 }10 public static void registerForComparison(Class<?> clazz, RecursiveComparisonConfiguration config, List<RecursiveComparisonConfiguration> configs) {11 RecursiveComparisonDifferenceCalculator.registerForComparison(clazz, config, configs);12 }13 public static void registerForComparison(Class<?> clazz, List<RecursiveComparisonConfiguration> configs) {14 RecursiveComparisonDifferenceCalculator.registerForComparison(clazz, configs);15 }16 public static void registerForComparison(Class<?> clazz, RecursiveComparisonConfiguration... configs) {17 RecursiveComparisonDifferenceCalculator.registerForComparison(clazz, configs);18 }19 public static void registerForComparison(Class<?> clazz, RecursiveComparisonConfiguration config, RecursiveComparisonConfiguration config2) {20 RecursiveComparisonDifferenceCalculator.registerForComparison(clazz, config, config2);21 }22 public static void registerForComparison(Class<?> clazz, RecursiveComparisonConfiguration config, RecursiveComparisonConfiguration config2, RecursiveComparisonConfiguration config3) {23 RecursiveComparisonDifferenceCalculator.registerForComparison(clazz, config, config2, config3);24 }25 public static void registerForComparison(Class

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registerForComparison

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1public void testRegisterForComparison() {2 RecursiveComparisonDifferenceCalculator recursiveComparisonDifferenceCalculator = new RecursiveComparisonDifferenceCalculator();3 recursiveComparisonDifferenceCalculator.registerForComparison(RecursiveComparisonConfiguration.class, RecursiveComparisonConfigurationAssert.class);4 assertThat(recursiveComparisonDifferenceCalculator.getRegisteredComparators()).contains(RecursiveComparisonConfiguration.class);5}6public void testRegisterForComparison() {7 RecursiveComparisonDifferenceCalculator recursiveComparisonDifferenceCalculator = new RecursiveComparisonDifferenceCalculator();8 recursiveComparisonDifferenceCalculator.registerForComparison(RecursiveComparisonConfiguration.class, RecursiveComparisonConfigurationAssert.class);9 assertThat(recursiveComparisonDifferenceCalculator.getRegisteredComparators()).contains(RecursiveComparisonConfiguration.class);10}11public void testRegisterForComparison() {12 RecursiveComparisonDifferenceCalculator recursiveComparisonDifferenceCalculator = new RecursiveComparisonDifferenceCalculator();13 recursiveComparisonDifferenceCalculator.registerForComparison(RecursiveComparisonConfiguration.class, RecursiveComparisonConfigurationAssert.class);14 assertThat(recursiveComparisonDifferenceCalculator.getRegisteredComparators()).contains(RecursiveComparisonConfiguration.class);15}16public void testRegisterForComparison() {17 RecursiveComparisonDifferenceCalculator recursiveComparisonDifferenceCalculator = new RecursiveComparisonDifferenceCalculator();18 recursiveComparisonDifferenceCalculator.registerForComparison(RecursiveComparisonConfiguration.class, RecursiveComparisonConfigurationAssert.class);19 assertThat(recursiveComparisonDifferenceCalculator.getRegisteredComparators()).contains(RecursiveComparisonConfiguration.class);20}21public void testRegisterForComparison() {22 RecursiveComparisonDifferenceCalculator recursiveComparisonDifferenceCalculator = new RecursiveComparisonDifferenceCalculator();23 recursiveComparisonDifferenceCalculator.registerForComparison(RecursiveComparisonConfiguration.class, RecursiveComparisonConfigurationAssert.class);24 assertThat(recursiveComparisonDifferenceCalculator.getRegisteredComparators()).contains(RecursiveComparisonConfiguration.class);25}

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registerForComparison

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1public void testRecursiveComparison() {2 Person actual = new Person("John", "Doe", 30);3 Person expected = new Person("John", "Doe", 31);4 RecursiveComparisonConfiguration recursiveComparisonConfiguration = new RecursiveComparisonConfiguration();5 recursiveComparisonConfiguration.registerForComparison((actual, expected) -> {6 if (actual instanceof Person && expected instanceof Person) {7 Person actualPerson = (Person) actual;8 Person expectedPerson = (Person) expected;9 if (actualPerson.getAge() == expectedPerson.getAge()) {10 return ComparisonResult.DIFFERENT;11 }12 }13 return ComparisonResult.UNCOMPARABLE;14 });15 new RecursiveComparisonDifferenceCalculator(recursiveComparisonConfiguration);16 RecursiveComparisonResult recursiveComparisonResult = differenceCalculator.compare(actual, expected);17 assertThat(recursiveComparisonResult.differencesFound()).isTrue();18}

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1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.recursive.comparison.RecursiveComparisonConfiguration.builder;3import org.assertj.core.api.recursive.comparison.RecursiveComparisonConfiguration;4import org.junit.jupiter.api.Test;5public class RecursiveComparisonDifferenceCalculatorTest {6 public void test() {7 RecursiveComparisonConfiguration configuration = builder()8 .withIgnoredFields("id", "name")9 .build();10 Employee employee1 = new Employee(1, "John", "Doe", "Manager");11 Employee employee2 = new Employee(2, "John", "Doe", "Manager");12 assertThat(employee1).usingRecursiveComparison(configuration).isEqualTo(employee2);13 }14 static class Employee {15 private int id;16 private String firstName;17 private String lastName;18 private String designation;19 public Employee(int id, String firstName, String lastName, String designation) {20 this.id = id;21 this.firstName = firstName;22 this.lastName = lastName;23 this.designation = designation;24 }25 public int getId() {26 return id;27 }28 public String getFirstName() {29 return firstName;30 }31 public String getLastName() {32 return lastName;33 }34 public String getDesignation() {35 return designation;36 }37 public String toString() {38 return "Employee{" +39 '}';40 }41 }42}43 Employee{id=1, firstName='John', lastName='Doe', designation='Manager'}44 Employee{id=2, firstName='John', lastName='Doe', designation='Manager'}45at org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator.compare(RecursiveComparisonDifferenceCalculator.java:51)46at org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator.compare(RecursiveComparisonDifferenceCalculator.java:37)47at org.assertj.core.api.recursive.comparison.RecursiveComparisonDifferenceCalculator.compare(RecursiveComparisonDifference

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1@DisplayName("Recursive Comparison")2class RecursiveComparisonTest {3 void testRecursiveComparison() {4 Person person = new Person("John", "Doe", 30, new Address("1234", "Main St"));5 Person otherPerson = new Person("John", "Doe", 30, new Address("1234", "Main St"));6 RecursiveComparisonDifference difference = RecursiveComparisonDifferenceCalculator.registerForComparison(person, otherPerson);7 assertThat(difference).isNull();8 }9 void testRecursiveComparisonWithDifferentValues() {10 Person person = new Person("John", "Doe", 30, new Address("1234", "Main St"));11 Person otherPerson = new Person("Jane", "Doe", 30, new Address("1234", "Main St"));12 RecursiveComparisonDifference difference = RecursiveComparisonDifferenceCalculator.registerForComparison(person, otherPerson);13 assertThat(difference).isNotNull();14 assertThat(difference.getComparison().getActual()).isEqualTo("Jane");15 assertThat(difference.getComparison().getExpected()).isEqualTo("John");16 assertThat(difference.getComparison().getActualType()).isEqualTo(String.class);17 assertThat(difference.getComparison().getExpectedType()).isEqualTo(String.class);18 assertThat(difference.getComparison().getPath()).isEqualTo("firstName");19 }20 void testRecursiveComparisonWithDifferentObjects() {21 Person person = new Person("John", "Doe", 30, new Address("1234", "Main St"));22 Person otherPerson = new Person("John", "Doe", 30, new Address("1235", "Main St"));23 RecursiveComparisonDifference difference = RecursiveComparisonDifferenceCalculator.registerForComparison(person, otherPerson);24 assertThat(difference).isNotNull();25 assertThat(difference.getComparison().getActual()).isEqualTo("1235");26 assertThat(difference.getComparison().getExpected()).isEqualTo("1234");27 assertThat(difference.getComparison().getActualType()).isEqualTo(String.class);28 assertThat(difference.getComparison().getExpectedType()).isEqualTo(String.class);29 assertThat(difference.getComparison().getPath()).isEqualTo("address.postalCode");30 }31 void testRecursiveComparisonWithDifferentObjectsAndNull() {

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Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.

LambdaTest Learning Hubs:

YouTube

You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.

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