### Question:
Entry implements ContentHolder<T> { @Override public String toString() { return MoreObjects.toStringHelper(this).omitNullValues() .add("revision", revision.text()) .add("path", path) .add("type", type) .add("content", hasContent() ? contentAsText() : null) .toString(); } private  Entry(Revision revision, String path, EntryType type, @Nullable T content); static Entry<Void> ofDirectory(Revision revision, String path); static Entry<JsonNode> ofJson(Revision revision, String path, JsonNode content); static Entry<JsonNode> ofJson(Revision revision, String path, String content); static Entry<String> ofText(Revision revision, String path, String content); static Entry<T> of(Revision revision, String path, EntryType type, @Nullable T content); Revision revision(); String path(); boolean hasContent(); void ifHasContent(Consumer<? super T> consumer); @Override EntryType type(); @Override T content(); @Override String contentAsText(); @Override String contentAsPrettyText(); @Override int hashCode(); @Override boolean equals(Object o); @Override String toString();  }### Answer:
@Test void testToString() { assertThat(Entry.ofText(new Revision(1), "/a.txt", "a").toString()).isNotEmpty(); }