com.github.difflib.algorithm.DiffException Java Examples

/**
 * Computes a unified diff of the input strings, returning the empty string if the {@code
 * expected} and {@code actual} are equal.
 */
@Nonnull
@VisibleForTesting
static String getPatch(
    String expected, String actual, String expectedFileName, String actualFileName)
    throws DiffException {
  List<String> referenceLines = Arrays.asList(expected.split("\n"));
  List<String> testLines = Arrays.asList(actual.split("\n"));
  Patch<String> patch = DiffUtils.diff(referenceLines, testLines);
  if (patch.getDeltas().isEmpty()) {
    return "";
  } else {
    List<String> patchLines =
        UnifiedDiffUtils.generateUnifiedDiff(
            expectedFileName, actualFileName, referenceLines, patch, 3);
    return StringUtils.join(patchLines, "\n");
  }
}
 

@Test
public void testInitialProcessing() throws IOException, DiffException, URISyntaxException {
    String testFileDir = "preprocess-adoc";
    Path originalPath = Paths.get(testFileDir, "variousIncludes.adoc");
    List<String> originalLines = loadFromPath(originalPath);

    Path afterInitialPreprocessingPath = Paths.get(testFileDir,
            "variousIncludes-afterInitialPreprocessing.adoc");
    List<String> expectedAfterInitialPreprocessingLines =
            loadFromPath(afterInitialPreprocessingPath);

    List<String> actualAfterInitialPreprocessingLines =
            IncludePreprocessor.convertHybridToBracketed(originalLines);

    assertEquals(expectedAfterInitialPreprocessingLines,
            actualAfterInitialPreprocessingLines,
            DiffUtils.diff(expectedAfterInitialPreprocessingLines,
                    actualAfterInitialPreprocessingLines).toString());
}
 

private void compareFiles(Path pathA, Path pathB) throws IOException, MojoFailureException, MojoExecutionException {
    if (pathA.equals(pathB)) {
        getLog().warn(
                new IllegalArgumentException(
                    "'check' set to true but it will always pass: "
                            + "input and output files are the same"));
    }
    try {
        byte[] inputDigest = digest(pathA);
        byte[] outputDigest = digest(pathB);
        if (!Arrays.equals(inputDigest, outputDigest)) {
            throw new MojoFailureException(String.format(
                    "file %s does not match its expected pre-processed form; "
                            + "the commit might need an up-to-date file from running 'preprocess-adoc'%n%s ",
                    pathA.toString(),
                    formatDiffs(pathA, pathB)));
        }
    } catch (NoSuchAlgorithmException e) {
        throw new MojoExecutionException("error checking for matching input and output files", e);
    } catch (DiffException ex) {
        throw new MojoExecutionException(
            String.format("Error comparing %s and %s",
                    pathA.toString(),
                    pathB.toString()),
            ex);
    }
}
 

private String formatDiffs(Path pathA, Path pathB) throws IOException, DiffException {
    List<String> contentA = Files.readAllLines(pathA);
    List<String> contentB = Files.readAllLines(pathB);
    return DiffUtils.diff(contentA, contentB).getDeltas().stream()
            .map(Delta::toString)
            .collect(Collectors.joining(System.lineSeparator()));
}
 

private void runMojo(
        String pomFile,
        String expectedFile,
        String goal,
        Class<? extends AbstractAsciiDocMojo> mojoClass) throws Exception {
    AbstractAsciiDocMojo mojo = MavenPluginHelper.getInstance().getMojo(
            pomFile,
            INCLUDES_TEST_ROOT.toFile(),
            goal,
            mojoClass);
    mojo.execute();

    String baseDir = mojo.project().getBasedir().toPath().toString();
    Path mojoOutputPath = Paths.get(baseDir, "../../../../target/docs",
            "variousIncludes.adoc").normalize();
    List<String> mojoOutput = Files.readAllLines(mojoOutputPath);

    Path expectedOutputPath = Paths.get(
            baseDir,
            "../preprocess-adoc",
            expectedFile);
    List<String> expectedOutput = Files.readAllLines(expectedOutputPath);

    assertEquals(expectedOutput, mojoOutput, () -> {
        try {
            return DiffUtils.diff(expectedOutput, mojoOutput).toString();
        } catch (DiffException ex) {
            throw new RuntimeException(ex);
        }
    });
}
 

static String generateUnifiedDiff(
    ImmutableList<String> expectedContent, ImmutableList<String> actualContent) {
  Patch<String> diff;
  try {
    diff = DiffUtils.diff(expectedContent, actualContent);
  } catch (DiffException e) {
    throw new RuntimeException(e);
  }
  List<String> unifiedDiff =
      UnifiedDiffUtils.generateUnifiedDiff("expected", "actual", expectedContent, diff, 0);

  return Joiner.on('\n').join(unifiedDiff);
}
 

static String generateSideBySideDiff(
    ImmutableList<String> expectedContent, ImmutableList<String> actualContent) {
  DiffRowGenerator generator =
      DiffRowGenerator.create()
          .showInlineDiffs(true)
          .inlineDiffByWord(true)
          .oldTag(f -> "~")
          .newTag(f -> "**")
          .build();
  List<DiffRow> rows;
  try {
    rows = generator.generateDiffRows(expectedContent, actualContent);
  } catch (DiffException e) {
    throw new RuntimeException(e);
  }

  int maxExpectedLineLength =
      findMaxLineLength(rows.stream().map(DiffRow::getOldLine).collect(Collectors.toList()));
  int maxActualLineLength =
      findMaxLineLength(rows.stream().map(DiffRow::getNewLine).collect(Collectors.toList()));

  SideBySideRowFormatter sideBySideRowFormatter =
      new SideBySideRowFormatter(maxExpectedLineLength, maxActualLineLength);

  return Joiner.on('\n')
      .join(
          sideBySideRowFormatter.formatRow("Expected", "Actual", ' '),
          sideBySideRowFormatter.formatRow("", "", '-'),
          rows.stream()
              .map(
                  row ->
                      sideBySideRowFormatter.formatRow(row.getOldLine(), row.getNewLine(), ' '))
              .toArray());
}
 

public Map<String, String> generateDiffRows(List<String> resultSrc, List<String> resultDest) {

        Map<String, String> result = new HashMap<>();

        StringBuffer resultSrcHtml = new StringBuffer();
        StringBuffer resultDestHtml = new StringBuffer();
        boolean isFirst = true;

        DiffRowGenerator generator = DiffRowGenerator.create()
                .showInlineDiffs(true)
                .inlineDiffByWord(true)
                .build();
        try {
            for (int i = 0; i < resultSrc.size(); i++) {
                List<DiffRow> rows = generator.generateDiffRows(Arrays.asList(resultSrc.get(i).split(" ")), Arrays.asList(resultDest.get(i).split(" ")));

                for (DiffRow row : rows) {
                    if (!isFirst) {
                        resultSrcHtml.append(" ");
                        resultDestHtml.append(" ");
                    } else {
                        isFirst = false;
                    }

                    resultSrcHtml.append(row.getOldLine());
                    resultDestHtml.append(row.getNewLine());
                }
                resultSrcHtml.append("<br />");
                resultDestHtml.append("<br />");
            }
        } catch (DiffException e) {
            throw new ServerErrorException("분석 결과 비교 중 문제가 발생하였습니다.");
        }

        result.put("srcHtml", resultSrcHtml.toString());
        result.put("destHtml", resultDestHtml.toString());
        return result;
    }
 

@Test
public void getPatch() throws DiffException {
  String expected = "1\n2\n3";
  String actual = "1\n2";

  assertThat(
      Client.getPatch(expected, actual, "expected.txt", "actual.txt"),
      equalTo(
          "--- expected.txt\n"
              + "+++ actual.txt\n"
              + "@@ -1,3 +1,2 @@\n"
              + " 1\n"
              + " 2\n"
              + "-3"));
}
 

@Test
public void testSourceBlockIncludeBracketing() throws DiffException {
    List<String> orig = asList(
              "[source]\n"
            + ".Title of the source block\n"
            + "// _include::1-3:a.adoc\n"
            + "// _include::5-7:b.adoc\n"
            + "----\n"
            + "Not included\n"
            + "inc 1.1\n"
            + "inc 1.2\n"
            + "inc 1.3\n"
            + "Also not included\n"
            + "inc 2.1\n"
            + "inc 2.2\n"
            + "inc 2.3\n"
            + "Other not included\n"
            + "----"
    );

    List<String> expectedBracketed = asList(
              "[source]\n"
            + ".Title of the source block\n"
            + "----\n"
            + "Not included\n"
            + "// _include-start::a.adoc\n"
            + "include::a.adoc\n"
            + "// _include-end::a.adoc\n"
            + "Also not included\n"
            + "// _include-start::b.adoc\n"
            + "include::b.adoc\n"
            + "// _include-end::b.adoc\n"
            + "Other not included\n"
            + "----"
    );

    AtomicInteger lineNumber = new AtomicInteger(0);
    Block sba = Block.consumeBlock(orig, lineNumber);

    List<String> bracketed = sba.asBracketedBlock();
    assertEquals(expectedBracketed, bracketed,
            DiffUtils.diff(orig, bracketed).toString());
}
 

public Map<String, String> getDiffsFromAnalyzedResults(String strToAnalyze, String modelNameSrc, String modelNameDest) {
    ModelValidator.CheckValidModelName(modelNameSrc);
    ModelValidator.CheckValidModelName(modelNameDest);

    String resultSrc;
    String resultDest;
    Map<String, String> result = new HashMap<>();

    if ("DEFAULT".equals(modelNameSrc)) {
        resultSrc = this.analyzeWithLightModel(strToAnalyze);
    } else {
        resultSrc = this.analyzeWithUserModel(strToAnalyze, modelNameSrc);
    }

    if ("DEFAULT".equals(modelNameDest)) {
        resultDest = this.analyzeWithLightModel(strToAnalyze);
    } else {
        resultDest = this.analyzeWithUserModel(strToAnalyze, modelNameDest);
    }

    StringBuffer resultSrcHtml = new StringBuffer();
    StringBuffer resultDestHtml = new StringBuffer();
    boolean isFirst = true;

    DiffRowGenerator generator = DiffRowGenerator.create()
            .showInlineDiffs(true)
            .inlineDiffByWord(true)
            .build();
    try {
        List<DiffRow> rows = generator.generateDiffRows(Arrays.asList(resultSrc.split(" ")), Arrays.asList(resultDest.split(" ")));

        for (DiffRow row : rows) {
            if (!isFirst) {
                resultSrcHtml.append(" ");
                resultDestHtml.append(" ");
            } else {
                isFirst = false;
            }

            resultSrcHtml.append(row.getOldLine());
            resultDestHtml.append(row.getNewLine());
        }
    } catch (DiffException e) {
        throw new ServerErrorException("분석 결과 비교 중 문제가 발생하였습니다.");
    }

    result.put("srcHtml", resultSrcHtml.toString());
    result.put("destHtml", resultDestHtml.toString());

    return result;
}
 

/**
	 * Analyze a commit finding instances of changes return a Map<FileCommit, List>
	 */
	@SuppressWarnings("rawtypes")
	public AnalysisResult analyze(IRevision revision) {

		List<IRevisionPair> javaFiles = revision.getChildren();

		Map<String, Diff> diffOfFiles = new HashMap<>();

		List<DiffRow> rows = null;

		log.info("\n*****\nCommit: " + revision.getName());

		for (IRevisionPair<String> fileFromRevision : javaFiles) {

			String left = fileFromRevision.getPreviousVersion();
			String right = fileFromRevision.getNextVersion();

			String leftName = fileFromRevision.getPreviousName();
			String rightName = fileFromRevision.getName();

			Diff diff = compare(left, right, leftName, rightName);
			if (diff != null) {
				diffOfFiles.put(fileFromRevision.getName(), diff);
			}

			DiffRowGenerator generator = DiffRowGenerator.create().showInlineDiffs(false).inlineDiffByWord(false)
					.ignoreWhiteSpaces(true).build();

			try {
				rows = generator.generateDiffRows(
						Arrays.stream(fileFromRevision.getPreviousVersion().split("\n")).collect(Collectors.toList()),
						Arrays.stream(fileFromRevision.getNextVersion().split("\n")).collect(Collectors.toList()));
			} catch (DiffException e) {
				e.printStackTrace();
			}

//			System.out.println("Diff of the revision");
//			for (DiffRow row : rows) {
//				switch (row.getTag()) {
//					case INSERT:
//						System.out.println("+ " + valueOf(row.getNewLine()));
//						break;
//					case DELETE:
//						System.out.println("- " + valueOf(row.getOldLine()));
//						break;
//					case CHANGE:
//						System.out.println("- " + valueOf(row.getOldLine()));
//						System.out.println("+ " + valueOf(row.getNewLine()));
//						break;
//				}
//			}

		}

		return (new DiffResult<IRevision, Diff>(revision, diffOfFiles, rows));
	}