amples[0].start, 7.5);
    assert.strictEqual(m.device.powerSeries.samples[5].start, 10.0);
  });

  test('importExplicitClockSync_syncOnNegativeVoltageLine', function() {
    // Add a BattOr sample with an explicit clock sync that occurs on a line
    // with a negative voltage measurement. The sample should be ignored, but
    // the clock sync should be counted.
    const battorLinesWithExplicitSync = BATTOR_LINES.slice();
    battorLinesWithExplicitSync.push(
        '2.500000 -1.000000 4000.000000 <ABC