p(t, '--foo: auto');
  assert_equals(styleMap.get('--Foo'), null);
}, 'Getting a custom property not in the inline style returns null');

test(t => {
  const styleMap = createInlineStyleMap(t, '');
  assert_equals(styleMap.get('width'), null);
}, 'Getting a valid property not in the inline style returns null');

test(t => {
  const styleMap = createInlineStyleMap(t, 'width: 10px; height: 20px');
  assert_style_value_equals(styleMap.get('width'), new CSSUnitValue(10, 'px'));
}, 'Getting a valid property from