private String rawContents
    private String contents

    private Map<String, Schema> schemas = loadSchemas()

    def "can write an empty file"() {
        when:
        builder.verifyMetadata = verifyMetadata
        builder.verifySignatures = verifySignatures
        serialize()

        then:
        contents == """<?xml version="1.0" encoding="UTF-8"?>
<verification-metadata>

    /**
     * Creates a new [FileTree] which contains the contents of the given ZIP file.
     *
     * The given `zipPath` path is evaluated as per [file]
     *
     * The returned file tree is lazy, so that it scans for files only when the contents of the file tree are
     * queried. The file tree is also live, so that it scans for files each time the contents of the file tree are
     * queried.
     *

    /**
     * Creates a new [FileTree] which contains the contents of the given ZIP file.
     *
     * The given `zipPath` path is evaluated as per [file]
     *
     * The returned file tree is lazy, so that it scans for files only when the contents of the file tree are
     * queried. The file tree is also live, so that it scans for files each time the contents of the file tree are
     * queried.
     *

        """Apple LLVM version ${version} (clang-${versionWithoutDots}0.0.38)
Target: x86_64-apple-darwin16.7.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
 "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -cc1 -triple x86_64-apple-macosx10.12.0 -E -fcolor-diagnostics -dM -o - -x c -

When present in a Maven module, the file must have the extension `module`. For example, in version 1.2 of 'mylib', the file should be called `mylib-1.2.module`.

Gradle ignores the contents of the Maven POM when the module metadata file is present.

## Contents

The file must be encoded using UTF-8.

The file must contain a JSON object with the following values:

        value.visitContents(child -> child.visitStructure(new FileCollectionStructureVisitor() {
            @Override
            public void visitCollection(Source source, Iterable<File> contents) {
                ImmutableSet<File> files = ImmutableSet.copyOf(contents);
                if (!files.isEmpty()) {
                    builder.add(new FileCollectionAdapter(new ListBackedFileSet(files), taskDependencyFactory, patternSetFactory));

                @Override
                public void visitCollection(FileCollectionInternal.Source source, Iterable<File> contents) {
                    contents.forEach(location -> taskInputs.add(location.getAbsolutePath()));
                }

                @Override

    }

    public ResolutionHost resolutionHost(String displayName) {
        return new NameBackedResolutionHost(displayName);
    }

    /**
     * Presents the contents of the given artifacts as a partial {@link FileCollectionInternal} implementation.
     *
     * <p>This produces only a minimal implementation to use for artifact sets loaded from the configuration cache

    public void renderSections() {
        contents.append("<div class=\"uk-container uk-container-expand\">\n")
            .append("        <ul uk-accordion>\n");
        boolean first = true;
        for (Section section : sections.values()) {
            if (first) {
                contents.append("            <li class=\"uk-open\">\n");
            } else {
                contents.append("            <li>\n");
            }

        Snapshot now = snapshot();
        assertTrue(String.format("contents or modification time of %s have not changed", this), now.modTime != snapshot.modTime || !now.hash.equals(snapshot.hash));
    }

    public void assertContentsHaveChangedSince(Snapshot snapshot) {
        Snapshot now = snapshot();
        assertNotEquals(String.format("contents of %s have not changed", this), snapshot.hash, now.hash);
    }