Check that the CSS property (e.g. "background-color") of an element matches
a value.
See also
Other conditions:
has_attr(),
has_length(),
has_name(),
has_text(),
is_enabled(),
is_present(),
is_visible()
Examples
html <- "
<div style='display:none;'></div>
"
session <- minimal_selenider_session(html)
has_css_property(s("div"), "display", "none")