code: def test_init_file(self):
      s = stats.Stats()
      s.init_file("foo", 10)
      assert s.summary() == stats.Summary(
          uploaded_bytes=0, total_bytes=10, deduped_bytes=0
      )
  
file_path: wandb/tests/pytest_tests/unit_tests/test_file_stats.py
imports: import pytest
  from wandb.filesync import stats
label_desc: Use image node_id 1 for calling the TestSummary obj's underlying member method code with example usage: obj.test_init_file() without return types