public void AppendFormatted_String_ICustomFormatter()
{
var provider = new ConcatFormatter();
var expected = new StringBuilder();
InterpolatedStringBuilder actual = InterpolatedStringBuilder.Create(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_ReadOnlySpanChar()
{
var expected = new StringBuilder();
InterpolatedStringBuilder actual = InterpolatedStringBuilder.Create(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_ValueTypes_CreateProviderFlowed(bool useScratch)
{
void Test <T>(T t)
{
var provider = new CultureInfo("en-US");
InterpolatedStringBuilder builder = useScratch ?
InterpolatedStringBuilder.Create(1, 2, provider, stackalloc char[16]) :
InterpolatedStringBuilder.Create(1, 2, provider);
builder.AppendFormatted(t);
Assert.Same(provider, ((IHasToStringState)t).ToStringState.LastProvider);
builder.AppendFormatted(t, 1);
Assert.Same(provider, ((IHasToStringState)t).ToStringState.LastProvider);
builder.AppendFormatted(t, "X2");
Assert.Same(provider, ((IHasToStringState)t).ToStringState.LastProvider);
builder.AppendFormatted(t, 1, "X2");
Assert.Same(provider, ((IHasToStringState)t).ToStringState.LastProvider);
}
Test(new FormattableInt32Wrapper(42));
Test(new SpanFormattableInt32Wrapper(84));
Test((FormattableInt32Wrapper?)new FormattableInt32Wrapper(42));
Test((SpanFormattableInt32Wrapper?)new SpanFormattableInt32Wrapper(84));
}
public void ToStringAndClear_Clears()
{
InterpolatedStringBuilder builder = InterpolatedStringBuilder.Create(0, 0);
builder.AppendLiteral("hi");
Assert.Equal("hi", builder.ToStringAndClear());
Assert.Equal(string.Empty, builder.ToStringAndClear());
}
public void AppendFormatted_ReferenceTypes()
{
var expected = new StringBuilder();
InterpolatedStringBuilder actual = InterpolatedStringBuilder.Create(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());
}
public void ToString_DoesntClear()
{
InterpolatedStringBuilder builder = InterpolatedStringBuilder.Create(0, 0);
builder.AppendLiteral("hi");
for (int i = 0; i < 3; i++)
{
Assert.Equal("hi", builder.ToString());
}
Assert.Equal("hi", builder.ToStringAndClear());
}
public void AppendLiteral()
{
var expected = new StringBuilder();
InterpolatedStringBuilder actual = InterpolatedStringBuilder.Create(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();
InterpolatedStringBuilder builder = useScratch ?
InterpolatedStringBuilder.Create(3, 1000, null, stackalloc char[16]) :
InterpolatedStringBuilder.Create(3, 1000);
for (int i = 0; i < 1000; i++)
{
builder.AppendFormatted(i);
expected.Append(i);
builder.AppendFormatted(i, 3);
expected.AppendFormat("{0,3}", i);
}
Assert.Equal(expected.ToString(), builder.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();
InterpolatedStringBuilder actual = InterpolatedStringBuilder.Create(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();
InterpolatedStringBuilder actual = InterpolatedStringBuilder.Create(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();
InterpolatedStringBuilder actual = InterpolatedStringBuilder.Create(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 void LengthAndHoleArguments_Valid(int literalLength, int formattedCount)
{
InterpolatedStringBuilder.Create(literalLength, formattedCount);
Span <char> scratch1 = stackalloc char[1];
foreach (IFormatProvider provider in new IFormatProvider[] { null, new ConcatFormatter(), CultureInfo.InvariantCulture, CultureInfo.CurrentCulture, new CultureInfo("en-US"), new CultureInfo("fr-FR") })
{
InterpolatedStringBuilder.Create(literalLength, formattedCount, provider);
InterpolatedStringBuilder.Create(literalLength, formattedCount, provider, default);
InterpolatedStringBuilder.Create(literalLength, formattedCount, provider, scratch1);
InterpolatedStringBuilder.Create(literalLength, formattedCount, provider, Array.Empty <char>());
InterpolatedStringBuilder.Create(literalLength, formattedCount, provider, new char[256]);
}
InterpolatedStringBuilder.Create(literalLength, formattedCount, Span <char> .Empty);
InterpolatedStringBuilder.Create(literalLength, formattedCount, scratch1);
InterpolatedStringBuilder.Create(literalLength, formattedCount, Array.Empty <char>());
InterpolatedStringBuilder.Create(literalLength, formattedCount, new char[256]);
}
public void AppendFormatted_ReferenceTypes_CreateProviderFlowed(bool useScratch)
{
var provider = new CultureInfo("en-US");
InterpolatedStringBuilder builder = useScratch ?
InterpolatedStringBuilder.Create(1, 2, provider, stackalloc char[16]) :
InterpolatedStringBuilder.Create(1, 2, provider);
foreach (IHasToStringState tss in new IHasToStringState[] { new FormattableStringWrapper("hello"), new SpanFormattableStringWrapper("hello") })
{
builder.AppendFormatted(tss);
Assert.Same(provider, tss.ToStringState.LastProvider);
builder.AppendFormatted(tss, 1);
Assert.Same(provider, tss.ToStringState.LastProvider);
builder.AppendFormatted(tss, "X2");
Assert.Same(provider, tss.ToStringState.LastProvider);
builder.AppendFormatted(tss, 1, "X2");
Assert.Same(provider, tss.ToStringState.LastProvider);
}
}
