private void assertNoParseErrors(TomlParseResult result) {
        if (result.hasErrors()) {
            List<TomlParseError> errors = result.errors();
            reportErrors(errors);

            TreeFormatter formatter = new TreeFormatter();
            formatter.node(INVALID_TOML_CATALOG_DEFINITION);
            formatter.startChildren();
            formatter.node(getProblemString(errors));
            formatter.endChildren();

import org.gradle.api.tasks.util.PatternSet;
import org.gradle.internal.Cast;
import org.gradle.internal.Factory;
import org.gradle.internal.file.PathToFileResolver;
import org.gradle.internal.logging.text.TreeFormatter;
import org.gradle.internal.state.Managed;

import javax.annotation.Nullable;
import java.io.File;
import java.util.AbstractSet;
import java.util.ArrayList;
import java.util.Collection;

import spock.lang.Specification

import java.util.function.Consumer

import static org.gradle.util.internal.TextUtil.toPlatformLineSeparators

class TreeFormatterTest extends Specification {
    def formatter = new TreeFormatter()

    def "formats single node"() {
        when:
        formatter.node("Some thing.")

        then:
        formatter.toString() == "Some thing."
    }

    def "formats root with no children"() {