private void CheckInvalidParse(string input)
{
Assert.Throws <FormatException>(() => { StringWithQualityHeaderValue.Parse(input); });
Assert.False(StringWithQualityHeaderValue.TryParse(input, out StringWithQualityHeaderValue result));
Assert.Null(result);
}
public void TryParse_Invalid()
{
StringWithQualityHeaderValue res;
Assert.IsFalse(StringWithQualityHeaderValue.TryParse("", out res), "#1");
Assert.IsNull(res, "#2");
}
private void CheckInvalidTryParse(string input)
{
StringWithQualityHeaderValue result = null;
Assert.False(StringWithQualityHeaderValue.TryParse(input, out result));
Assert.Null(result);
}
private void CheckValidTryParse(string input, StringWithQualityHeaderValue expectedResult)
{
StringWithQualityHeaderValue result = null;
Assert.True(StringWithQualityHeaderValue.TryParse(input, out result));
Assert.Equal(expectedResult, result);
}
public void TryParse()
{
StringWithQualityHeaderValue res;
Assert.IsTrue(StringWithQualityHeaderValue.TryParse("a", out res), "#1");
Assert.AreEqual("a", res.Value, "#2");
Assert.IsNull(res.Quality, "#3");
}
private void CheckValidParse(string input, StringWithQualityHeaderValue expectedResult)
{
StringWithQualityHeaderValue result = StringWithQualityHeaderValue.Parse(input);
Assert.Equal(expectedResult, result);
Assert.True(StringWithQualityHeaderValue.TryParse(input, out result));
Assert.Equal(expectedResult, result);
// New lines are never allowed
for (int i = 0; i < input.Length; i++)
{
CheckInvalidParse(input.Insert(i, "\r"));
CheckInvalidParse(input.Insert(i, "\n"));
CheckInvalidParse(input.Insert(i, "\r\n"));
CheckInvalidParse(input.Insert(i, "\r\n "));
}
}
public static IEnumerable <StringWithQualityHeaderValue> GetAcceptLanguage(this IHttpRequest req)
=> req.GetHeaders("Accept-Language")
.TryWhere(
(string acceptString, out StringWithQualityHeaderValue acceptHeader) =>
StringWithQualityHeaderValue.TryParse(acceptString, out acceptHeader))
.Select(tpl => tpl.@out);