public static void Split_Char_NullInput()
{
// First, make sure that <null>.Split(',') yields a single-element [ <null> ].
Utf8Span source = Utf8Span.Empty;
var enumerator = source.Split(',').GetEnumerator();
Assert.True(enumerator.MoveNext());
Assert.True(source.Bytes == enumerator.Current.Bytes); // referential equality
Assert.False(enumerator.MoveNext());
// Next, make sure that if "remove empty entries" is specified, yields the empty set [ ].
enumerator = source.Split(',', Utf8StringSplitOptions.RemoveEmptyEntries).GetEnumerator();
Assert.False(enumerator.MoveNext());
}
public static void Split_Deconstruct()
{
using BoundedUtf8Span boundedSpan = new BoundedUtf8Span("a,b,c,d,e");
Utf8Span span = boundedSpan.Span;
// Note referential equality checks below (since we want to know exact slices
// into the original buffer), not deep (textual) equality checks.
{
(Utf8Span a, Utf8Span b) = span.Split('x'); // not found
Assert.True(a.Bytes == span.Bytes, "Expected referential equality of input.");
Assert.True(b.Bytes == default);
}
{
(Utf8Span a, Utf8Span b) = span.Split(',');
Assert.True(a.Bytes == span.Bytes[..1]); // "a"
Assert.True(b.Bytes == span.Bytes[2..]); // "b,c,d,e"
}
{
(Utf8Span a, Utf8Span b, Utf8Span c, Utf8Span d, Utf8Span e) = span.Split(',');
Assert.True(a.Bytes == span.Bytes[0..1]); // "a"
Assert.True(b.Bytes == span.Bytes[2..3]); // "b"
Assert.True(c.Bytes == span.Bytes[4..5]); // "c"
Assert.True(d.Bytes == span.Bytes[6..7]); // "d"
Assert.True(e.Bytes == span.Bytes[8..9]); // "e"
}
{
(Utf8Span a, Utf8Span b, Utf8Span c, Utf8Span d, Utf8Span e, Utf8Span f, Utf8Span g, Utf8Span h) = span.Split(',');
Assert.True(a.Bytes == span.Bytes[0..1]); // "a"
Assert.True(b.Bytes == span.Bytes[2..3]); // "b"
Assert.True(c.Bytes == span.Bytes[4..5]); // "c"
Assert.True(d.Bytes == span.Bytes[6..7]); // "d"
Assert.True(e.Bytes == span.Bytes[8..9]); // "e"
Assert.True(f.Bytes == default);
Assert.True(g.Bytes == default);
Assert.True(h.Bytes == default);
}
}
public static void Split_Deconstruct_WithOptions()
{
using BoundedUtf8Span boundedSpan = new BoundedUtf8Span("a, , b, c,, d, e");
Utf8Span span = boundedSpan.Span;
// Note referential equality checks below (since we want to know exact slices
// into the original buffer), not deep (textual) equality checks.
{
(Utf8Span a, Utf8Span b) = span.Split(',', Utf8StringSplitOptions.RemoveEmptyEntries);
Assert.True(a.Bytes == span.Bytes[..1]); // "a"
Assert.True(b.Bytes == span.Bytes[2..]); // " , b, c,, d, e"
}
{
(Utf8Span a, Utf8Span x, Utf8Span b, Utf8Span c, Utf8Span d, Utf8Span e) = span.Split(',', Utf8StringSplitOptions.RemoveEmptyEntries);
Assert.True(a.Bytes == span.Bytes[0..1]); // "a"
Assert.True(x.Bytes == span.Bytes[2..3]); // " "
Assert.True(b.Bytes == span.Bytes[4..6]); // " b"
Assert.True(c.Bytes == span.Bytes[7..9]); // " c"
Assert.True(d.Bytes == span.Bytes[11..13]); // " d"
Assert.True(e.Bytes == span.Bytes[14..]); // " e"
}
{
(Utf8Span a, Utf8Span b, Utf8Span c, Utf8Span d, Utf8Span e, Utf8Span f, Utf8Span g, Utf8Span h) = span.Split(',', Utf8StringSplitOptions.RemoveEmptyEntries | Utf8StringSplitOptions.TrimEntries);
Assert.True(a.Bytes == span.Bytes[0..1]); // "a"
Assert.True(b.Bytes == span.Bytes[5..6]); // "b"
Assert.True(c.Bytes == span.Bytes[8..9]); // "c"
Assert.True(d.Bytes == span.Bytes[12..13]); // "d"
Assert.True(e.Bytes == span.Bytes[15..]); // "e"
Assert.True(f.Bytes == default);
Assert.True(g.Bytes == default);
Assert.True(h.Bytes == default);
}
}
