public void ToStringAndClear_Clears()
{
DefaultInterpolatedStringHandler handler = new DefaultInterpolatedStringHandler(0, 0);
handler.AppendLiteral("hi");
Assert.Equal("hi", handler.ToStringAndClear());
Assert.Equal(string.Empty, handler.ToStringAndClear());
}
public void AppendFormatted_ReadOnlySpanChar()
{
var expected = new StringBuilder();
DefaultInterpolatedStringHandler actual = new DefaultInterpolatedStringHandler(0, 0);
foreach (string s in new[] { "", "a", "bc", "def", "this is a longer string", "!" })
{
// span
expected.Append(s);
actual.AppendFormatted((ReadOnlySpan <char>)s);
// span, format
expected.AppendFormat("{0:X2}", s);
actual.AppendFormatted((ReadOnlySpan <char>)s, format: "X2");
foreach (int alignment in new[] { 0, 3, -3 })
{
// span, alignment
expected.AppendFormat("{0," + alignment.ToString(CultureInfo.InvariantCulture) + "}", s);
actual.AppendFormatted((ReadOnlySpan <char>)s, alignment);
// span, alignment, format
expected.AppendFormat("{0," + alignment.ToString(CultureInfo.InvariantCulture) + ":X2}", s);
actual.AppendFormatted((ReadOnlySpan <char>)s, alignment, "X2");
}
}
Assert.Equal(expected.ToString(), actual.ToStringAndClear());
}
public void AppendFormatted_String_ICustomFormatter()
{
var provider = new ConcatFormatter();
var expected = new StringBuilder();
DefaultInterpolatedStringHandler actual = new DefaultInterpolatedStringHandler(0, 0, provider);
foreach (string s in new[] { null, "", "a" })
{
// string
expected.AppendFormat(provider, "{0}", s);
actual.AppendFormatted(s);
// string, format
expected.AppendFormat(provider, "{0:X2}", s);
actual.AppendFormatted(s, "X2");
// string, alignment
expected.AppendFormat(provider, "{0,3}", s);
actual.AppendFormatted(s, 3);
// string, alignment, format
expected.AppendFormat(provider, "{0,-3:X2}", s);
actual.AppendFormatted(s, -3, "X2");
}
Assert.Equal(expected.ToString(), actual.ToStringAndClear());
}
public void AppendFormatted_ReferenceTypes()
{
var expected = new StringBuilder();
DefaultInterpolatedStringHandler actual = new DefaultInterpolatedStringHandler(0, 0);
foreach (string rawInput in new[] { null, "", "a", "bc", "def", "this is a longer string", "!" })
{
foreach (object o in new object[]
{
rawInput, // raw string directly; ToString will return itself
new StringWrapper(rawInput), // wrapper object that returns string from ToString
new FormattableStringWrapper(rawInput), // IFormattable wrapper around string
new SpanFormattableStringWrapper(rawInput) // ISpanFormattable wrapper around string
})
{
// object
expected.AppendFormat("{0}", o);
actual.AppendFormatted(o);
if (o is IHasToStringState tss1)
{
Assert.True(string.IsNullOrEmpty(tss1.ToStringState.LastFormat));
AssertModeMatchesType(tss1);
}
// object, format
expected.AppendFormat("{0:X2}", o);
actual.AppendFormatted(o, "X2");
if (o is IHasToStringState tss2)
{
Assert.Equal("X2", tss2.ToStringState.LastFormat);
AssertModeMatchesType(tss2);
}
foreach (int alignment in new[] { 0, 3, -3 })
{
// object, alignment
expected.AppendFormat("{0," + alignment.ToString(CultureInfo.InvariantCulture) + "}", o);
actual.AppendFormatted(o, alignment);
if (o is IHasToStringState tss3)
{
Assert.True(string.IsNullOrEmpty(tss3.ToStringState.LastFormat));
AssertModeMatchesType(tss3);
}
// object, alignment, format
expected.AppendFormat("{0," + alignment.ToString(CultureInfo.InvariantCulture) + ":X2}", o);
actual.AppendFormatted(o, alignment, "X2");
if (o is IHasToStringState tss4)
{
Assert.Equal("X2", tss4.ToStringState.LastFormat);
AssertModeMatchesType(tss4);
}
}
}
}
Assert.Equal(expected.ToString(), actual.ToStringAndClear());
}
static void TestManualDefaultStringInterpolationHandler()
{
Console.WriteLine("TestManualDefaultStringInterpolationHandler:");
C c = new C(42);
DefaultInterpolatedStringHandler defaultInterpolatedStringHandler = new DefaultInterpolatedStringHandler(0, 1);
defaultInterpolatedStringHandler.AppendFormatted(c);
M2(Space(), defaultInterpolatedStringHandler.ToStringAndClear());
}
public void ToString_DoesntClear()
{
DefaultInterpolatedStringHandler handler = new DefaultInterpolatedStringHandler(0, 0);
handler.AppendLiteral("hi");
for (int i = 0; i < 3; i++)
{
Assert.Equal("hi", handler.ToString());
}
Assert.Equal("hi", handler.ToStringAndClear());
}
public void AppendLiteral()
{
var expected = new StringBuilder();
DefaultInterpolatedStringHandler actual = new DefaultInterpolatedStringHandler(0, 0);
foreach (string s in new[] { "", "a", "bc", "def", "this is a long string", "!" })
{
expected.Append(s);
actual.AppendLiteral(s);
}
Assert.Equal(expected.ToString(), actual.ToStringAndClear());
}
public void Grow_Large(bool useScratch)
{
var expected = new StringBuilder();
DefaultInterpolatedStringHandler handler = useScratch ?
new DefaultInterpolatedStringHandler(3, 1000, null, stackalloc char[16]) :
new DefaultInterpolatedStringHandler(3, 1000);
for (int i = 0; i < 1000; i++)
{
handler.AppendFormatted(i);
expected.Append(i);
handler.AppendFormatted(i, 3);
expected.AppendFormat("{0,3}", i);
}
Assert.Equal(expected.ToString(), handler.ToStringAndClear());
}
public void AppendFormatted_ValueTypes_ICustomFormatter()
{
var provider = new ConcatFormatter();
void Test <T>(T t)
{
void AssertTss(T tss, string format)
{
Assert.Equal(format, ((IHasToStringState)tss).ToStringState.LastFormat);
Assert.Same(provider, ((IHasToStringState)tss).ToStringState.LastProvider);
Assert.Equal(ToStringMode.ICustomFormatterFormat, ((IHasToStringState)tss).ToStringState.ToStringMode);
}
var expected = new StringBuilder();
DefaultInterpolatedStringHandler actual = new DefaultInterpolatedStringHandler(0, 0, provider);
// struct
expected.AppendFormat(provider, "{0}", t);
actual.AppendFormatted(t);
AssertTss(t, null);
// struct, format
expected.AppendFormat(provider, "{0:X2}", t);
actual.AppendFormatted(t, "X2");
AssertTss(t, "X2");
// struct, alignment
expected.AppendFormat(provider, "{0,3}", t);
actual.AppendFormatted(t, 3);
AssertTss(t, null);
// struct, alignment, format
expected.AppendFormat(provider, "{0,-3:X2}", t);
actual.AppendFormatted(t, -3, "X2");
AssertTss(t, "X2");
Assert.Equal(expected.ToString(), actual.ToStringAndClear());
}
Test(new FormattableInt32Wrapper(42));
Test(new SpanFormattableInt32Wrapper(84));
Test((FormattableInt32Wrapper?)new FormattableInt32Wrapper(42));
Test((SpanFormattableInt32Wrapper?)new SpanFormattableInt32Wrapper(84));
}
public void AppendFormatted_ValueTypes()
{
void Test <T>(T t)
{
var expected = new StringBuilder();
DefaultInterpolatedStringHandler actual = new DefaultInterpolatedStringHandler(0, 0);
// struct
expected.AppendFormat("{0}", t);
actual.AppendFormatted(t);
Assert.True(string.IsNullOrEmpty(((IHasToStringState)t).ToStringState.LastFormat));
AssertModeMatchesType(((IHasToStringState)t));
// struct, format
expected.AppendFormat("{0:X2}", t);
actual.AppendFormatted(t, "X2");
Assert.Equal("X2", ((IHasToStringState)t).ToStringState.LastFormat);
AssertModeMatchesType(((IHasToStringState)t));
foreach (int alignment in new[] { 0, 3, -3 })
{
// struct, alignment
expected.AppendFormat("{0," + alignment.ToString(CultureInfo.InvariantCulture) + "}", t);
actual.AppendFormatted(t, alignment);
Assert.True(string.IsNullOrEmpty(((IHasToStringState)t).ToStringState.LastFormat));
AssertModeMatchesType(((IHasToStringState)t));
// struct, alignment, format
expected.AppendFormat("{0," + alignment.ToString(CultureInfo.InvariantCulture) + ":X2}", t);
actual.AppendFormatted(t, alignment, "X2");
Assert.Equal("X2", ((IHasToStringState)t).ToStringState.LastFormat);
AssertModeMatchesType(((IHasToStringState)t));
}
Assert.Equal(expected.ToString(), actual.ToStringAndClear());
}
Test(new FormattableInt32Wrapper(42));
Test(new SpanFormattableInt32Wrapper(84));
Test((FormattableInt32Wrapper?)new FormattableInt32Wrapper(42));
Test((SpanFormattableInt32Wrapper?)new SpanFormattableInt32Wrapper(84));
}
public void AppendFormatted_ReferenceTypes_ICustomFormatter()
{
var provider = new ConcatFormatter();
var expected = new StringBuilder();
DefaultInterpolatedStringHandler actual = new DefaultInterpolatedStringHandler(0, 0, provider);
foreach (string s in new[] { null, "", "a" })
{
foreach (IHasToStringState tss in new IHasToStringState[] { new FormattableStringWrapper(s), new SpanFormattableStringWrapper(s) })
{
void AssertTss(IHasToStringState tss, string format)
{
Assert.Equal(format, tss.ToStringState.LastFormat);
Assert.Same(provider, tss.ToStringState.LastProvider);
Assert.Equal(ToStringMode.ICustomFormatterFormat, tss.ToStringState.ToStringMode);
}
// object
expected.AppendFormat(provider, "{0}", tss);
actual.AppendFormatted(tss);
AssertTss(tss, null);
// object, format
expected.AppendFormat(provider, "{0:X2}", tss);
actual.AppendFormatted(tss, "X2");
AssertTss(tss, "X2");
// object, alignment
expected.AppendFormat(provider, "{0,3}", tss);
actual.AppendFormatted(tss, 3);
AssertTss(tss, null);
// object, alignment, format
expected.AppendFormat(provider, "{0,-3:X2}", tss);
actual.AppendFormatted(tss, -3, "X2");
AssertTss(tss, "X2");
}
}
Assert.Equal(expected.ToString(), actual.ToStringAndClear());
}
public string ToStringAndClear() => _innerHandler.ToStringAndClear();
/// <summary>Creates a new string by using the specified provider to control the formatting of the specified interpolated string.</summary>
/// <param name="provider">An object that supplies culture-specific formatting information.</param>
/// <param name="initialBuffer">The initial buffer that may be used as temporary space as part of the formatting operation. The contents of this buffer may be overwritten.</param>
/// <param name="handler">The interpolated string.</param>
/// <returns>The string that results for formatting the interpolated string using the specified format provider.</returns>
public static string Create(IFormatProvider?provider, Span <char> initialBuffer, [InterpolatedStringHandlerArgument("provider", "initialBuffer")] ref DefaultInterpolatedStringHandler handler) =>
handler.ToStringAndClear();
/// <summary>Creates a new string by using the specified provider to control the formatting of the specified interpolated string.</summary> /// <param name="provider">An object that supplies culture-specific formatting information.</param> /// <param name="handler">The interpolated string.</param> /// <returns>The string that results for formatting the interpolated string using the specified format provider.</returns> public static string Create(IFormatProvider?provider, [InterpolatedStringHandlerArgument(nameof(provider))] ref DefaultInterpolatedStringHandler handler) => handler.ToStringAndClear();
public string ToStringAndClear()
{
return(_innerHandler.ToStringAndClear());
}