Path temp = createTempFile();
    assertTrue(Files.exists(temp));
    Files.delete(temp);
    assertFalse(Files.exists(temp));

    MoreFiles.touch(temp);
    assertTrue(Files.exists(temp));
    MoreFiles.touch(temp);
    assertTrue(Files.exists(temp));
  }

  public void testTouchTime() throws IOException {
    Path temp = createTempFile();
    assertTrue(Files.exists(temp));

  }

  public void testTouch() throws IOException {
    File temp = createTempFile();
    assertTrue(temp.exists());
    assertTrue(temp.delete());
    assertFalse(temp.exists());
    Files.touch(temp);
    assertTrue(temp.exists());
    Files.touch(temp);
    assertTrue(temp.exists());

    assertThrows(
        IOException.class,
        () ->
            Files.touch(

        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setBoost_Exists() {
        setBoost_Exists(null);
    }

    public void setBoost_Exists(ConditionOptionCall<ExistsQueryBuilder> opLambda) {
        ExistsQueryBuilder builder = regExistsQ("boost");
        if (opLambda != null) {
            opLambda.callback(builder);

        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setEndTime_Exists() {
        setEndTime_Exists(null);
    }

    public void setEndTime_Exists(ConditionOptionCall<ExistsQueryBuilder> opLambda) {
        ExistsQueryBuilder builder = regExistsQ("endTime");
        if (opLambda != null) {

        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setCreatedBy_Exists() {
        setCreatedBy_Exists(null);
    }

    public void setCreatedBy_Exists(ConditionOptionCall<ExistsQueryBuilder> opLambda) {
        ExistsQueryBuilder builder = regExistsQ("createdBy");
        if (opLambda != null) {

  }

  private interface HierarchyFixtureInterface {
    // Exists only for hierarchy mapping; no members.
  }

  private interface HierarchyFixtureSubinterface extends HierarchyFixtureInterface {
    // Exists only for hierarchy mapping; no members.
  }

  private static class HierarchyFixtureParent implements HierarchyFixtureSubinterface {
    // Exists only for hierarchy mapping; no members.
  }

        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setCreatedTime_Exists() {
        setCreatedTime_Exists(null);
    }

    public void setCreatedTime_Exists(ConditionOptionCall<ExistsQueryBuilder> opLambda) {
        ExistsQueryBuilder builder = regExistsQ("createdTime");
        if (opLambda != null) {

    public void assertFileExistence(File dir, String filename, boolean shouldExist) {
        File file = new File(dir, filename);

        if (shouldExist) {
            assertTrue(file.exists());
        } else {
            assertFalse(file.exists());
        }
    }

    public void assertFileContents(File dir, String filename, String contentsTest, String encoding) throws IOException {

                .globalToolchainsSource(
                        globalToolchainsPath != null && Files.exists(globalToolchainsPath)
                                ? Source.fromPath(globalToolchainsPath)
                                : null)
                .userToolchainsSource(
                        userToolchainsPath != null && Files.exists(userToolchainsPath)
                                ? Source.fromPath(userToolchainsPath)

        // No project, but most certainly a dependency which has been built previously
        File packagedArtifactFile = findInProjectLocalRepository(artifact);
        if (packagedArtifactFile != null && packagedArtifactFile.exists()) {
            return packagedArtifactFile;
        }

        return null;
    }

    public List<String> findVersions(Artifact artifact) {
        List<String> versions = getProjects()