code: def setUp(self) -> None:
      # correct embedding file as created through lightly
      self.embeddings_path = tempfile.mktemp(".csv", "embeddings")
      embeddings = np.random.rand(32, 2)
      labels = [0 for i in range(len(embeddings))]
      filenames = [f"img_{i}.jpg" for i in range(len(embeddings))]
      io.save_embeddings(
          self.embeddings_path, embeddings, labels, filenames
      )
  
imports: import csv
  import json
  import tempfile
  import unittest
  from pathlib import Path
  import numpy
  from lightly.utils import io
  from tests.api_workflow.mocked_api_workflow_client import MockedApiWorkflowSetup
label_desc: Use image node_id 1 for calling the TestEmbeddingsIO obj's underlying member method code with example usage: obj.setUp() without return types