// First line of input has 'key' 'tab' 'value'
  // Second line of input starts with a tab character. 
  // So, it has empty key and the whole line as value.
  // Third line of input does not have any tab character.
  // So, the whole line is the key and value is empty.
// First line of input has 'key' 'tab' 'value'
  // Second line of input starts with a tab character. 
  // So, it has empty key and the whole line as value.
  // Third line of input does not have any tab character.
  // So, the whole line is the key and value is empty. | TestStreamingKeyValue.java