KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use Delta class of org.assertj.core.util.diff package

Best Assertj code snippet using org.assertj.core.util.diff.Delta

Source:MyersDiff.java

...14import static org.assertj.core.util.Preconditions.checkArgument;15import static org.assertj.core.util.Preconditions.checkState;16import java.util.ArrayList;17import java.util.List;18import org.assertj.core.util.diff.ChangeDelta;19import org.assertj.core.util.diff.Chunk;20import org.assertj.core.util.diff.DeleteDelta;21import org.assertj.core.util.diff.Delta;22import org.assertj.core.util.diff.DiffAlgorithm;23import org.assertj.core.util.diff.InsertDelta;24import org.assertj.core.util.diff.Patch;25/**26 * Copy from https://code.google.com/p/java-diff-utils/.27 * <p>28 * A clean-room implementation of <a href="http://www.cs.arizona.edu/people/gene/">29 * Eugene Myers</a> differencing algorithm.30 *31 * <p> See the paper at <a href="http://www.cs.arizona.edu/people/gene/PAPERS/diff.ps">32 * http://www.cs.arizona.edu/people/gene/PAPERS/diff.ps</a></p>33 *34 * @author <a href="mailto:juanco@suigeneris.org">Juanco Anez</a>35 * @param <T> The type of the compared elements in the 'lines'.36 */37public class MyersDiff<T> implements DiffAlgorithm<T> {38  /** The equalizer. */39  private final Equalizer<T> equalizer;40  /**41   * Constructs an instance of the Myers differencing algorithm.42   */43  public MyersDiff() {44    /**	Default equalizer. */45    equalizer = new Equalizer<T>() {46      @Override47      public boolean equals(T original, T revised) {48        return original.equals(revised);49      }50    };51  }52  /**53   * {@inheritDoc}54   *55   * Return empty diff if get the error while procession the difference.56   */57  public Patch<T> diff(final List<T> original, final List<T> revised) {58    checkArgument(original != null, "original list must not be null");59    checkArgument(revised != null, "revised list must not be null");60    PathNode path;61    try {62      path = buildPath(original, revised);63      return buildRevision(path, original, revised);64    } catch (IllegalStateException e) {65      e.printStackTrace();66      return new Patch<>();67    }68  }69  /**70   * Computes the minimum diffpath that expresses de differences71   * between the original and revised sequences, according72   * to Gene Myers differencing algorithm.73   *74   * @param orig The original sequence.75   * @param rev The revised sequence.76   * @return A minimum {@link PathNode Path} across the differences graph.77   * @throws IllegalStateException if a diff path could not be found.78   */79  public PathNode buildPath(final List<T> orig, final List<T> rev) {80    checkArgument(orig != null, "original sequence is null");81    checkArgument(rev != null, "revised sequence is null");82    // these are local constants83    final int N = orig.size();84    final int M = rev.size();85    final int MAX = N + M + 1;86    final int size = 1 + 2 * MAX;87    final int middle = size / 2;88    final PathNode diagonal[] = new PathNode[size];89    diagonal[middle + 1] = new Snake(0, -1, null);90    for (int d = 0; d < MAX; d++) {91      for (int k = -d; k <= d; k += 2) {92        final int kmiddle = middle + k;93        final int kplus = kmiddle + 1;94        final int kminus = kmiddle - 1;95        PathNode prev;96        int i;97        if ((k == -d) || (k != d && diagonal[kminus].i < diagonal[kplus].i)) {98          i = diagonal[kplus].i;99          prev = diagonal[kplus];100        } else {101          i = diagonal[kminus].i + 1;102          prev = diagonal[kminus];103        }104        diagonal[kminus] = null; // no longer used105        int j = i - k;106        PathNode node = new DiffNode(i, j, prev);107        // orig and rev are zero-based108        // but the algorithm is one-based109        // that's why there's no +1 when indexing the sequences110        while (i < N && j < M && equals(orig.get(i), rev.get(j))) {111          i++;112          j++;113        }114        if (i > node.i) node = new Snake(i, j, node);115        diagonal[kmiddle] = node;116        if (i >= N && j >= M) return diagonal[kmiddle];117      }118      diagonal[middle + d - 1] = null;119    }120    // According to Myers, this cannot happen121    throw new IllegalStateException("could not find a diff path");122  }123  private boolean equals(T orig, T rev) {124    return equalizer.equals(orig, rev);125  }126  /**127   * Constructs a {@link Patch} from a difference path.128   *129   * @param path The path.130   * @param orig The original sequence.131   * @param rev The revised sequence.132   * @return A {@link Patch} script corresponding to the path.133   */134  public Patch<T> buildRevision(PathNode path, List<T> orig, List<T> rev) {135    checkArgument(path != null, "path is null");136    checkArgument(orig != null, "original sequence is null");137    checkArgument(rev != null, "revised sequence is null");138    Patch<T> patch = new Patch<>();139    if (path.isSnake())140      path = path.prev;141    while (path != null && path.prev != null && path.prev.j >= 0) {142      checkState(!path.isSnake(), "bad diffpath: found snake when looking for diff");143      int i = path.i;144      int j = path.j;145      path = path.prev;146      int ianchor = path.i;147      int janchor = path.j;148      Chunk<T> original = new Chunk<>(ianchor, copyOfRange(orig, ianchor, i));149      Chunk<T> revised = new Chunk<>(janchor, copyOfRange(rev, janchor, j));150      Delta<T> delta;151      if (original.size() == 0 && revised.size() != 0) {152        delta = new InsertDelta<>(original, revised);153      } else if (original.size() > 0 && revised.size() == 0) {154        delta = new DeleteDelta<>(original, revised);155      } else {156        delta = new ChangeDelta<>(original, revised);157      }158      patch.addDelta(delta);159      if (path.isSnake()) path = path.prev;160    }161    return patch;162  }163  /**164   * Creates a new list containing the elements returned by {@link List#subList(int, int)}.165   * @param original The original sequence. Must not be {@code null}.166   * @param fromIndex low endpoint (inclusive) of the subList.167   * @param to high endpoint (exclusive) of the subList.168   * @return A new list of the specified range within the original list.169  170   */171  private List<T> copyOfRange(final List<T> original, final int fromIndex, final int to) {172    return new ArrayList<>(original.subList(fromIndex, to));...

Source:InputStreams_assertSameContentAs_Test.java

...28import org.assertj.core.api.AssertionInfo;29import org.assertj.core.internal.InputStreams;30import org.assertj.core.internal.InputStreamsBaseTest;31import org.assertj.core.internal.InputStreamsException;32import org.assertj.core.util.diff.Delta;33import org.junit.Test;34/**35 * Tests for <code>{@link InputStreams#assertSameContentAs(AssertionInfo, InputStream, InputStream)}</code>.36 * 37 * @author Matthieu Baechler38 */39public class InputStreams_assertSameContentAs_Test extends InputStreamsBaseTest {40  @Test41  public void should_throw_error_if_expected_is_null() {42    thrown.expectNullPointerException("The InputStream to compare to should not be null");43    inputStreams.assertSameContentAs(someInfo(), actual, null);44  }45  @Test46  public void should_fail_if_actual_is_null() {47    thrown.expectAssertionError(actualIsNull());48    inputStreams.assertSameContentAs(someInfo(), null, expected);49  }50  @Test51  public void should_pass_if_inputstreams_have_equal_content() throws IOException {52    when(diff.diff(actual, expected)).thenReturn(new ArrayList<Delta<String>>());53    inputStreams.assertSameContentAs(someInfo(), actual, expected);54  }55  @Test56  public void should_throw_error_wrapping_catched_IOException() throws IOException {57    IOException cause = new IOException();58    when(diff.diff(actual, expected)).thenThrow(cause);59    try {60      inputStreams.assertSameContentAs(someInfo(), actual, expected);61      fail("Expected a InputStreamsException to be thrown");62    } catch (InputStreamsException e) {63      assertThat(e.getCause()).isSameAs(cause);64    }65  }66  @Test67  public void should_fail_if_inputstreams_do_not_have_equal_content() throws IOException {68    @SuppressWarnings("unchecked")69    List<Delta<String>> diffs = newArrayList((Delta<String>) mock(Delta.class));70    when(diff.diff(actual, expected)).thenReturn(diffs);71    AssertionInfo info = someInfo();72    try {73      inputStreams.assertSameContentAs(info, actual, expected);74    } catch (AssertionError e) {75      verify(failures).failure(info, shouldHaveSameContent(actual, expected, diffs));76      return;77    }78    failBecauseExpectedAssertionErrorWasNotThrown();79  }80}...

Source:JsonDiff.java

1package com.trickl.assertj.core.internal;2import com.trickl.assertj.core.api.json.JsonContainer;3import com.trickl.assertj.util.diff.JsonFieldDelta;4import com.trickl.assertj.util.diff.JsonRootDelta;5import java.io.IOException;6import java.util.Collections;7import java.util.LinkedList;8import java.util.List;9import org.assertj.core.util.VisibleForTesting;10import org.assertj.core.util.diff.Delta;11import org.json.JSONException;12import org.skyscreamer.jsonassert.FieldComparisonFailure;13import org.skyscreamer.jsonassert.JSONCompare;14import org.skyscreamer.jsonassert.JSONCompareResult;15import org.skyscreamer.jsonassert.comparator.JSONComparator;16/** Compares the contents of two JSON objects. */17@VisibleForTesting18public class JsonDiff {19  /**20   * Compares JSON object provided to the expected JSON object using provided comparator, and21   * returns the results of the comparison.22   *23   * @param actual actual JSON object24   * @param expected expected JSON object25   * @param comparator comparator to use26   * @return A list of differences27   * @throws IOException IF there's an error parsing the JSON28   */29  @VisibleForTesting30  public List<Delta<String>> diff(31      JsonContainer actual, JsonContainer expected, JSONComparator comparator) throws IOException {32    try {33      String expectedStr = expected.getJson();34      String actualStr = actual.getJson();35      JSONCompareResult result = JSONCompare.compareJSON(expectedStr, actualStr, comparator);36      return asDiff(result, expectedStr, actualStr);37    } catch (JSONException ex) {38      throw new IOException(ex);39    }40  }41  private List<Delta<String>> asDiff(JSONCompareResult result, String expectedStr, String actualStr)42      throws JSONException {43    if (result.passed()) {44      return Collections.emptyList();45    }46    List<Delta<String>> diffs = new LinkedList<>();47    for (FieldComparisonFailure missingField : result.getFieldMissing()) {48      diffs.add(new JsonFieldDelta<>(missingField, Delta.TYPE.DELETE));49    }50    for (FieldComparisonFailure changedField : result.getFieldFailures()) {51      diffs.add(new JsonFieldDelta<>(changedField, Delta.TYPE.CHANGE));52    }53    for (FieldComparisonFailure unexpectedField : result.getFieldUnexpected()) {54      diffs.add(new JsonFieldDelta<>(unexpectedField, Delta.TYPE.INSERT));55    }56    if (diffs.isEmpty()) {57      String expectedNoFormat = expectedStr.replace("\n", "").replace("\r", "");58      String actualNoFormat = actualStr.replace("\n", "").replace("\r", "");59      diffs.add(new JsonRootDelta<>(expectedNoFormat, actualNoFormat, result.getMessage()));60    }61    return diffs;62  }63}

Delta

Using AI Code Generation

1import static org.assertj.core.util.diff.Delta.Type.CHANGE;2import static org.assertj.core.util.diff.Delta.Type.DELETE;3import static org.assertj.core.util.diff.Delta.Type.INSERT;4import static org.assertj.core.util.diff.Delta.Type.EQUAL;5import java.util.ArrayList;6import java.util.List;7import org.assertj.core.util.diff.Delta;8import org.assertj.core.util.diff.DeltaVisitor;9import org.assertj.core.util.diff.DiffUtils;10public class DiffUtilsTest {11	public static void main(String[] args) {12		List<String> original = new ArrayList<>();13		original.add("1");14		original.add("2");15		original.add("3");16		original.add("4");17		original.add("5");18		List<String> revised = new ArrayList<>();19		revised.add("1");20		revised.add("2");21		revised.add("4");22		revised.add("5");23		List<Delta<String>> deltas = DiffUtils.diff(original, revised).getDeltas();24		System.out.println("deltas size: "+deltas.size());25		for(Delta<String> delta: deltas){26			System.out.println("delta type: "+delta.getType());27		}28		DeltaVisitor<String> visitor = new DeltaVisitor<String>() {29			public void visit(Delta<String> delta) {30				if(delta.getType()==CHANGE){31					System.out.println("change");32				}33				if(delta.getType()==DELETE){34					System.out.println("delete");35				}36				if(delta.getType()==INSERT){37					System.out.println("insert");38				}39				if(delta.getType()==EQUAL){40					System.out.println("equal");41				}42			}43		};44		DiffUtils.diff(original, revised).visit(visitor);45	}46}

Delta

Using AI Code Generation

1import org.assertj.core.util.diff.Delta;2import org.assertj.core.util.diff.DiffUtils;3import org.assertj.core.util.diff.Patch;4import java.io.IOException;5import java.util.ArrayList;6import java.util.Arrays;7import java.util.List;8public class DeltaExample {9    public static void main(String[] args) throws IOException {10        List<String> original = Arrays.asList("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M");11        List<String> revised = Arrays.asList("A", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M");12        Patch<String> patch = DiffUtils.diff(original, revised);13        for (Delta<String> delta : patch.getDeltas()) {14            System.out.println(delta);15        }16    }17}

Delta

Using AI Code Generation

1package org.example;2import org.assertj.core.util.diff.Delta;3import org.assertj.core.util.diff.Delta.TYPE;4import org.assertj.core.util.diff.DiffUtils;5import org.assertj.core.util.diff.Patch;6import java.util.List;7public class 1 {8	public static void main(String[] args) {9		List<String> original = Arrays.asList("line1", "line2", "line3", "line4", "line5", "line6");10		List<String> revised = Arrays.asList("line1", "line2", "line4", "line5", "line7");11		Patch<String> patch = DiffUtils.diff(original, revised);12		System.out.println("patch = " + patch);13		for (Delta<String> delta : patch.getDeltas()) {14			System.out.println(delta);15			System.out.println("Original: " + delta.getOriginal());16			System.out.println("Revised: " + delta.getRevised());17			System.out.println("Type: " + delta.getType());18		}19	}20}21In the above example, we have used the DiffUtils.diff() method to compute the difference between the original and revised List<String> . Then we have used Patch.getDeltas() method to get the list of

Delta

Using AI Code Generation

1import org.assertj.core.util.diff.Delta;2import org.assertj.core.util.diff.DiffUtils;3import org.assertj.core.util.diff.Patch;4import java.io.IOException;5import java.util.ArrayList;6import java.util.Arrays;7import java.util.List;8public class DeltaExample {9    public static void main(String[] args) throws IOException {10        List<String> original = Arrays.asList("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M");11        List<String> revised = Arrays.asList("A", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M");12        Patch<String> patch = DiffUtils.diff(original, revised);13        for (Delta<String> delta : patch.getDeltas()) {14            System.out.println(delta);15        }16    }17}

Delta

Using AI Code Generation

1import java.util.List;2import org.assertj.core.util.diff.Delta;3import org.assertj.core.util.diff.DiffUtils;4import org.assertj.core.util.diff.Patch;5public class Diff {6    public static void main(String[] args) {7        List<String> original = Arrays.asList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j");8        List<String> revised = Arrays.asList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k");9        Patch patch = DiffUtils.diff(original, revised);10        for (Delta delta : patch.getDeltas()) {11            System.out.println(delta);12        }13    }14}

Delta

Using AI Code Generation

1import java.util.ArrayList;2import java.util.List;3import org.assertj.core.util.diff.Delta;4import org.assertj.core.util.diff.DiffUtils;5import org.assertj.core.util.diff.Patch;6public class DiffUtil {7    public static void main(String[] args) {8        List<String> original = new ArrayList<>();9        original.add("1");10        original.add("2");11        original.add("3");12        original.add("4");13        original.add("5");14        original.add("6");15        original.add("7");16        original.add("8");17        original.add("9");18        original.add("10");19        original.add("11");20        original.add("12");21        original.add("13");22        original.add("14");23        original.add("15");24        original.add("16");25        original.add("17");26        original.add("18");27        original.add("19");28        original.add("20");29        List<String> revised = new ArrayList<>();30        revised.add("1");31        revised.add("2");32        revised.add("3");33        revised.add("4");34        revised.add("5");35        revised.add("6");36        revised.add("7");37        revised.add("8");38        revised.add("9");39        revised.add("10");40        revised.add("11");41        revised.add("12");42        revised.add("13");43        revised.add("14");44        revised.add("15");45        revised.add("16");46        revised.add("17");47        revised.add("18");48        revised.add("19");49        revised.add("20");50        Patch<String> patch = DiffUtils.diff(original, revised);51        int count = 0;52        for (Delta<String> delta : patch.getDeltas()) {53            count++;54            System.out.println(delta);55        }56        System.out.println("Total count: " + count);57    }58}59import java.util.ArrayList;60import java.util.List;61import org.junit.internal.matchers.Differ;62import org.junit.internal.matchers.StringDiff;63public class DiffUtil {64    public static void main(String[] args) {65        List<String> original = new ArrayList<>();66        original.add("1");67        original.add("2");68        original.add("3");69        original.add("4");70        original.add("5");71        original.add("6");72        original.add("7");73        original.add("8");

Delta

Using AI Code Generation

1import java.util.List;2import org.assertj.core.util.diff.Delta;3import org.assertj.core.util.diff.DiffUtils;4import org.assertj.core.util.diff.Patch;5public class Diff {6  public static void main(String[] args) {7    List<String> original = Arrays.asList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j");8    List<String> revised = Arrays.asList("a", "c", "b", "e", "f", "h", "g", "i", "j");9    Patch patch = DiffUtils.diff(original, revised);10    for (Delta delta : patch.getDeltas()) {11      System.out.println(delta);12    }13  }14}15Delta(INSERT, [1], [b])16Delta(DELETE, [2], [])17Delta(SWAP, [3], [e])18Delta(SWAP, [4], [f])19Delta(SWAP, [5], [h])20Delta(SWAP, [6], [g])21The overloaded method of diff() method is:22public static Patch diff(List<?> original, List<?> revised, DeltaType deltaType)23The overloaded method of diff() method is used to get the patch object by specifying the delta type. The delta type is used to specify the type of delta to be used. The delta type can be one of the following:24The overloaded method of diff() method is used to get the patch object by specifying the delta type. The delta type is used to specify the type of delta to be used. The delta type can be one of the following:

Delta

Using AI Code Generation

1import java.util.ArrayList;2import java.util.List;3import org.assertj.core.util.diff.Delta;4import org.assertj.core.util.diff.DiffUtils;5import org.assertj.core.util.diff.Patch;6public class DiffUtil {7    public static void main(String[] args) {8        List<String> original = new ArrayList<>();9        original.add("1");10        original.add("2");11        original.add("3");12        original.add("4");13        original.add("5");14        original.add("6");15        original.add("7");16        original.add("8");17        original.add("9");18        original.add("10");19        original.add("11");20        original.add("12");21        original.add("13");22        original.add("14");23        original.add("15");24        original.add("16");25        original.add("17");26        original.add("18");27        original.add("19");28        original.add("20");29        List<String> revised = new ArrayList<>();30        revised.add("1");31        revised.add("2");32        revised.add("3");33        revised.add("4");34        revised.add("5");35        revised.add("6");36        revised.add("7");37        revised.add("8");38        revised.add("9");39        revised.add("10");40        revised.add("11");41        revised.add("12");42        revised.add("13");43        revised.add("14");44        revised.add("15");45        revised.add("16");46        revised.add("17");47        revised.add("18");48        revised.add("19");49        revised.add("20");50        Patch<String> patch = DiffUtils.diff(original, revised);51        int count = 0;52        for (Delta<String> delta : patch.getDeltas()) {53            count++;54            System.out.println(delta);55        }56        System.out.println("Total count: " + count);57    }58}59import java.util.ArrayList;60import java.util.List;61import org.junit.internal.matchers.Differ;62import org.junit.internal.matchers.StringDiff;63public class DiffUtil {64    public static void main(String[] args) {65        List<String> original = new ArrayList<>();66        original.add("1");67        original.add("2");68        original.add("3");69        original.add("4");70        original.add("5");71        original.add("6");72        original.add("7");73        original.add("8");

Delta

Using AI Code Generation

1import org.assertj.core.util.diff.*;2import java.util.*;3public class Test {4    public static void main(String[] args) {5        List<String> original = Arrays.asList("a", "b", "c", "d", "e", "f");6        List<String> revised = Arrays.asList("a", "c", "b", "f", "d", "e");7        Patch<String> patch = DiffUtils.diff(original, revised);8        System.out.println(patch.getDeltas());9    }10}

Delta

Using AI Code Generation

1import org.assertj.core.util.diff.*;2import java.util.*;3public class 1 {4    public static void main(String[] args) {5        String[] original = {"a", "b", "c", "d", "e", "f"};6        String[] revised = {"a", "c", "b", "f", "g", "h", "d", "e"};7        List<String> originalList = Arrays.asList(original);8        List<String> revisedList = Arrays.asList(revised);9        Patch patch = DiffUtils.diff(originalList, revisedList);10        for (Delta delta : patch.getDeltas()) {11            System.out.println(delta);12        }13    }14}

Delta

Using AI Code Generation

1package org.assertj.core.util.diff;2import java.util.ArrayList;3import java.util.List;4public class DeltaExample {5    public static void main(String[] args) {6        List<String> original = new ArrayList<String>();7        original.add("a");8        original.add("b");9        original.add("c");10        original.add("a");11        original.add("b");12        original.add("b");13        original.add("a");14        List<String> revised = new ArrayList<String>();15        revised.add("c");16        revised.add("a");17        revised.add("b");18        revised.add("b");19        revised.add("a");20        revised.add("d");21        Patch patch = DiffUtils.diff(original, revised);22        for (Delta delta : patch.getDeltas()) {23            System.out.println(delta);24        }25    }26}

Delta

Using AI Code Generation

1import java.util.*;2import org.assertj.core.util.diff.*;3public class 1 {4   public static void main(String[] args) {5      String s1 = "Hello World";6      String s2 = "Hello World!";7      Delta delta = DiffUtils.diff(s1, s2);8      List<Delta> deltas = delta.getDeltas();9      System.out.println(deltas);10   }11}

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.