old_contents: import pytest
  
  import pandas as pd
  
  from .. import Vega, VegaLite
  
  
  PANDAS_DATA = pd.DataFrame({'x': [1, 2, 3], 'y': [4, 5, 6]})
  JSON_DATA = {
      "values": [
          {"x": 1, "y": 4},
          {"x": 2, "y": 5},
          {"x": 3, "y": 6}
      ]
  }
  
  VEGALITE_SPEC = {
      "mark": "circle",
      "encoding": {
          "x": {"field": "x", "type": "quantitative"},
          "y": {"field": "y", "type": "quantitative"}
      }
  }
  
  # TODO: use an actual Vega spec
  VEGA_SPEC = VEGALITE_SPEC
  
  
  def test_vegalite_output():
      # TODO: somehow test that output is valid HTML/JS?
      spec_with_data = VEGALITE_SPEC.copy()
      spec_with_data['data'] = JSON_DATA
  
      # Test three ways of specifying data
      obj1 = VegaLite(VEGALITE_SPEC, PANDAS_DATA)
      obj2 = VegaLite(VEGALITE_SPEC, JSON_DATA['values'])
      obj3 = VegaLite(spec_with_data)
  
      html1 = obj1._generate_html(id='ABC')
      html2 = obj2._generate_html(id='ABC')
      html3 = obj3._generate_html(id='ABC')
      assert html1 == html2 == html3
  
      js1 = obj1._generate_js(id='ABC', sort_keys=True)
      js2 = obj2._generate_js(id='ABC', sort_keys=True)
      js3 = obj3._generate_js(id='ABC', sort_keys=True)
      assert js1 == js2 == js3
  
  
  def test_vega_output():
      # TODO: use an actual vega spec
      data = pd.DataFrame({'x': [1, 2, 3], 'y': [4, 5, 6]})
      obj = Vega(VEGA_SPEC, data)
      html = obj._generate_html(id='ABC')
      js = obj._generate_js(id='ABC')
  
new_contents: import pytest
  
  import pandas as pd
  
  from .. import Vega, VegaLite
  
  
  PANDAS_DATA = pd.DataFrame({'x': [1, 2, 3], 'y': [4, 5, 6]})
  JSON_DATA = {
      "values": [
          {"x": 1, "y": 4},
          {"x": 2, "y": 5},
          {"x": 3, "y": 6}
      ]
  }
  
  VEGALITE_SPEC = {
      "mark": "circle",
      "encoding": {
          "x": {"field": "x", "type": "quantitative"},
          "y": {"field": "y", "type": "quantitative"}
      }
  }
  
  # TODO: use an actual Vega spec
  VEGA_SPEC = VEGALITE_SPEC
  
  
  def test_vegalite_output():
      # TODO: somehow test that output is valid HTML/JS?
      spec_with_data = VEGALITE_SPEC.copy()
      spec_with_data['data'] = JSON_DATA
  
      # Test three ways of specifying data
      obj1 = VegaLite(VEGALITE_SPEC, PANDAS_DATA)
      obj2 = VegaLite(VEGALITE_SPEC, JSON_DATA['values'])
      obj3 = VegaLite(spec_with_data)
  
      js1 = obj1._generate_js(id='ABC', sort_keys=True)
      js2 = obj2._generate_js(id='ABC', sort_keys=True)
      js3 = obj3._generate_js(id='ABC', sort_keys=True)
      assert js1 == js2 == js3
  
  
  def test_vega_output():
      # TODO: use an actual vega spec
      data = pd.DataFrame({'x': [1, 2, 3], 'y': [4, 5, 6]})
      obj = Vega(VEGA_SPEC, data)
      js = obj._generate_js(id='ABC')
  
subject: Remove obsolete HTML tests