actualOutput.txt

Primary Book

Primary Book
Primary Book

book.html

{{title}}

expectedOutput.txt

Primary Book

Related Book 1
Related Book 2

TestSnippet.java

 @Test
  public void testSurprisingBehavior() throws Exception {
    final class Book {
      public String title;

      public Book(String title) {
        this.title = title;
      }
    }

    Map<String, Object> model = new HashMap<String, Object>();
    model.put("book", new Book("Primary Book"));
    List<Book> relatedBooks = new ArrayList<Book>();
    relatedBooks.add(new Book("Related Book 1"));
    relatedBooks.add(new Book("Related Book 2"));
    model.put("relatedBooks", relatedBooks);

    MustacheFactory factory = new DefaultMustacheFactory(root);
    Mustache stache = factory.compile("unexpected.html");
    StringWriter writer = new StringWriter();
    stache.execute(writer, model);
    assertEquals(getContents(root, "expectedOutput.txt"), writer.toString());

  }

unexpected.html

{{book.title}}

{{#relatedBooks}}
{{> book}}
{{/relatedBooks}}