	@Test
	public void testWriteAllOnMockVertexListStream() throws IOException {

		VertexListStream vertexListStream = new MockVertexListStream(vertices);
		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

		try (VertexListStreamWriter writer = new VertexListStreamWriter(vertexListStream, outputStream)) {
			writer.writeAll();
			assertEquals("Output of VertexListStreamWriter is correct", expectedOutput, outputStream.toString());
		}
	}