background-size: center / cover fails

[Wayne-Mather]

The following test case will fail as the parser does not parse this valid CSS correctly.

[Test]
public void CssBackgroundSizeCoverCenterTest()
{
    var snippet = "background-size : center / cover";
    var property = ParseDeclaration(snippet);
    Assert.AreEqual("background-size", property.Name);
    Assert.IsFalse(property.IsImportant);
    Assert.IsFalse(property.IsInherited);
    Assert.IsTrue(property.HasValue); // Error - Is False
    Assert.AreEqual("center / cover", property.Value); // Error - Value is empty
}

[FlorianRappl]

PRs are welcome on this one.

[Wayne-Mather]

PR #125 submitted

[FlorianRappl]

This is not a valid size. See https://developer.mozilla.org/en-US/docs/Web/CSS/background-size.