### Question:
CmakeExternalNativeJsonGenerator extends ExternalNativeJsonGenerator { @NonNull @VisibleForTesting static String correctMakefilePaths(@NonNull String input, @NonNull File makeFileDirectory) { Matcher cmakeFinderMatcher = cmakeFileFinder.matcher(input); if (cmakeFinderMatcher.matches()) { List<String> corrected = new ArrayList<>(); for (String entry : input.split(System.lineSeparator())) { cmakeFinderMatcher = cmakeFileFinder.matcher(entry); if (cmakeFinderMatcher.matches()) { String fileName = cmakeFinderMatcher.group(3); File makeFile = new File(fileName); if (makeFile.isAbsolute()) { corrected.add(entry); continue; } makeFile = new File(makeFileDirectory, fileName); if (!makeFile.exists()) { corrected.add(entry); continue; } corrected.add( cmakeFinderMatcher.group(1) + makeFile.getAbsolutePath() + cmakeFinderMatcher.group(4)); } else { corrected.add(entry); } } return Joiner.on(System.lineSeparator()).join(corrected); } return input; } CmakeExternalNativeJsonGenerator(
            @NonNull JsonGenerationVariantConfiguration config,
            @NonNull Set<String> configurationFailures,
            @NonNull AndroidBuilder androidBuilder,
            @NonNull File cmakeInstallFolder,
            @NonNull GradleBuildVariant.Builder stats); @NonNull abstract String executeProcessAndGetOutput(
            @NonNull JsonGenerationAbiConfiguration abiConfig); @NonNull @Override String executeProcess(@NonNull JsonGenerationAbiConfiguration abiConfig); @NonNull File getCompileCommandsJson(@NonNull String abi); @NonNull @Override NativeBuildSystem getNativeBuildSystem();  }### Answer:
@Test public void testMakefilePathCorrection() throws IOException { File makefile = temporaryFolder.newFile(RELATIVE_FILE_NAME); String input = String.format(Locale.getDefault(), ERROR_STRING, RELATIVE_FILE_NAME); String expected = String.format(Locale.getDefault(), ERROR_STRING, makefile.getAbsolutePath()); String actual = CmakeExternalNativeJsonGenerator.correctMakefilePaths( input, makefile.getParentFile()); assertEquals(expected, actual); }
@Test public void testMakefilePathCorrectionForAbsolutePath() throws IOException { File makefile = temporaryFolder.newFile(RELATIVE_FILE_NAME); String input = String.format(Locale.getDefault(), ERROR_STRING, makefile.getAbsolutePath()); String actual = CmakeExternalNativeJsonGenerator.correctMakefilePaths( input, makefile.getParentFile()); assertEquals(input, actual); }
@Test public void testMakefilePathCorrectionForNonexistentFile() { String input = String.format(Locale.getDefault(), ERROR_STRING, RELATIVE_FILE_NAME); String actual = CmakeExternalNativeJsonGenerator.correctMakefilePaths( input, temporaryFolder.getRoot()); assertEquals(input, actual); }
@Test public void testMakefilePathCorrectionOverMultipleLines() throws IOException { File absoluteMakefile = temporaryFolder.newFile(RELATIVE_FILE_NAME); String otherErrorFile = "MissingErrorFile.txt"; String base = ERROR_STRING + System.lineSeparator() + "This line should not change at all" + System.lineSeparator() + " " + ERROR_STRING + System.lineSeparator() + System.lineSeparator() + System.lineSeparator() + "Another string that won't match the RegEx."; String input = String.format( Locale.getDefault(), base, absoluteMakefile.getName(), otherErrorFile); String expected = String.format( Locale.getDefault(), base, absoluteMakefile.getAbsolutePath(), otherErrorFile); String actual = CmakeExternalNativeJsonGenerator.correctMakefilePaths( input, absoluteMakefile.getParentFile()); assertEquals(expected, actual); }