resource.exists
        !resource.hasEmptyContent
        resource.contentCached
    }

    def emptyStringResourceHasEmptyContent() {
        expect:
        def resource = new StringTextResource('displayname', '')
        resource.text == ''
        resource.exists
        resource.hasEmptyContent
        resource.contentCached
    }

    def resourceHasNoIdentity() {
        expect:

        private final IndexedCache<HashCode, V> contentCache;
        private final Calculator<? extends V> calculator;

        DefaultFileContentCache(String name, FileSystemAccess fileSystemAccess, IndexedCache<HashCode, V> contentCache, Calculator<? extends V> calculator) {
            this.name = name;
            this.fileSystemAccess = fileSystemAccess;
            this.contentCache = contentCache;
            this.calculator = calculator;