public void FormatFlags_ReturnsValidString_WhenUsingValidValueWithCustomDelimiter()
{
AssertTryFormatFlags(ColorFlagEnum.Black, " | ", "Black");
AssertTryFormatFlags(ColorFlagEnum.Red, " | ", "Red");
AssertTryFormatFlags(ColorFlagEnum.Green, " | ", "Green");
AssertTryFormatFlags(ColorFlagEnum.Blue, " | ", "Blue");
AssertTryFormatFlags(ColorFlagEnum.Red | ColorFlagEnum.Green, " | ", "Red | Green");
AssertTryFormatFlags(ColorFlagEnum.Red | ColorFlagEnum.Blue, " | ", "Red | Blue");
AssertTryFormatFlags(ColorFlagEnum.Green | ColorFlagEnum.Blue, " | ", "Green | Blue");
AssertTryFormatFlags(ColorFlagEnum.Red | ColorFlagEnum.Green | ColorFlagEnum.Blue, " | ", "Red | Green | Blue");
AssertTryFormatFlags(ColorFlagEnum.UltraViolet, " | ", "UltraViolet");
AssertTryFormatFlags(ColorFlagEnum.Red | ColorFlagEnum.Green | ColorFlagEnum.Blue | ColorFlagEnum.UltraViolet, " | ", "All");
void AssertTryFormatFlags(ColorFlagEnum value, string delimiter, string expected)
{
Assert.AreEqual(expected, FlagEnums.FormatFlags(value, delimiter));
#if SPAN
var dest = new char[expected.Length];
Assert.True(FlagEnums.TryFormatFlags(value, dest, out var charsWritten, delimiter));
Assert.AreEqual(expected.Length, charsWritten);
Assert.AreEqual(expected, new string(dest));
dest = new char[expected.Length - 1];
Assert.False(FlagEnums.TryFormatFlags(value, dest, out charsWritten, delimiter));
Assert.AreEqual(0, charsWritten);
CollectionAssert.AreEqual(new char[dest.Length], dest);
#endif
}
}
public void FormatFlags_ReturnsValidString_WhenUsingInvalidValue()
{
AssertTryFormatFlags((ColorFlagEnum)16, "16");
void AssertTryFormatFlags(ColorFlagEnum value, string expected)
{
Assert.AreEqual(expected, FlagEnums.FormatFlags(value));
#if SPAN
var dest = new char[expected.Length];
Assert.True(FlagEnums.TryFormatFlags(value, dest, out var charsWritten));
Assert.AreEqual(expected.Length, charsWritten);
Assert.AreEqual(expected, new string(dest));
dest = new char[expected.Length - 1];
Assert.False(FlagEnums.TryFormatFlags(value, dest, out charsWritten));
Assert.AreEqual(0, charsWritten);
CollectionAssert.AreEqual(new char[dest.Length], dest);
#endif
}
}
public void FormatFlags_UsesDefaultDelimiter_WhenUsingValidValueWithEmptyDelimiter()
{
var value = ColorFlagEnum.Red | ColorFlagEnum.Green;
AssertTryFormatFlags(value, FlagEnums.FormatFlags(value));
void AssertTryFormatFlags(ColorFlagEnum value, string expected)
{
Assert.AreEqual(expected, FlagEnums.FormatFlags(value, string.Empty));
#if SPAN
var dest = new char[expected.Length];
Assert.True(FlagEnums.TryFormatFlags(value, dest, out var charsWritten, string.Empty));
Assert.AreEqual(expected.Length, charsWritten);
Assert.AreEqual(expected, new string(dest));
dest = new char[expected.Length - 1];
Assert.False(FlagEnums.TryFormatFlags(value, dest, out charsWritten, string.Empty));
Assert.AreEqual(0, charsWritten);
CollectionAssert.AreEqual(new char[dest.Length], dest);
#endif
}
}