public void ThrowsWhenAddingHeaderAfterReadOnlyIsSet()
{
var headers = new FrameResponseHeaders();
headers.SetReadOnly();
Assert.Throws <InvalidOperationException>(() => ((IDictionary <string, StringValues>)headers).Add("my-header", new[] { "value" }));
}
public void ThrowsWhenChangingHeaderAfterReadOnlyIsSet()
{
var headers = new FrameResponseHeaders();
var dictionary = (IDictionary <string, StringValues>)headers;
dictionary.Add("my-header", new[] { "value" });
headers.SetReadOnly();
Assert.Throws <InvalidOperationException>(() => dictionary["my-header"] = "other-value");
}