public void AppendFormatted_String_ICustomFormatter()
{
var provider = new ConcatFormatter();
var expected = new StringBuilder();
var actual = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(0, 0, actual, provider);
foreach (string s in new[] { null, "", "a" })
{
// string
expected.AppendFormat(provider, "{0}", s);
iab.AppendFormatted(s);
// string, format
expected.AppendFormat(provider, "{0:X2}", s);
iab.AppendFormatted(s, "X2");
// string, alignment
expected.AppendFormat(provider, "{0,3}", s);
iab.AppendFormatted(s, 3);
// string, alignment, format
expected.AppendFormat(provider, "{0,-3:X2}", s);
iab.AppendFormatted(s, -3, "X2");
}
actual.Append(provider, ref iab);
Assert.Equal(expected.ToString(), actual.ToString());
}
public void AppendFormatted_ReadOnlySpanChar()
{
var expected = new StringBuilder();
var actual = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(0, 0, actual);
foreach (string s in new[] { "", "a", "bc", "def", "this is a longer string", "!" })
{
// span
expected.Append(s);
iab.AppendFormatted((ReadOnlySpan <char>)s);
// span, format
expected.AppendFormat("{0:X2}", s);
iab.AppendFormatted((ReadOnlySpan <char>)s, format: "X2");
foreach (int alignment in new[] { 0, 3, -3 })
{
// span, alignment
expected.AppendFormat("{0," + alignment.ToString(CultureInfo.InvariantCulture) + "}", s);
iab.AppendFormatted((ReadOnlySpan <char>)s, alignment);
// span, alignment, format
expected.AppendFormat("{0," + alignment.ToString(CultureInfo.InvariantCulture) + ":X2}", s);
iab.AppendFormatted((ReadOnlySpan <char>)s, alignment, "X2");
}
}
actual.Append(ref iab);
Assert.Equal(expected.ToString(), actual.ToString());
}
public void AppendFormatted_ValueTypes_CreateProviderFlowed()
{
void Test <T>(T t)
{
var provider = new CultureInfo("en-US");
var sb = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(1, 2, sb, provider);
iab.AppendFormatted(t);
Assert.Same(provider, ((IHasToStringState)t).ToStringState.LastProvider);
iab.AppendFormatted(t, 1);
Assert.Same(provider, ((IHasToStringState)t).ToStringState.LastProvider);
iab.AppendFormatted(t, "X2");
Assert.Same(provider, ((IHasToStringState)t).ToStringState.LastProvider);
iab.AppendFormatted(t, 1, "X2");
Assert.Same(provider, ((IHasToStringState)t).ToStringState.LastProvider);
sb.Append(ref iab);
}
Test(new FormattableInt32Wrapper(42));
Test(new SpanFormattableInt32Wrapper(84));
Test((FormattableInt32Wrapper?)new FormattableInt32Wrapper(42));
Test((SpanFormattableInt32Wrapper?)new SpanFormattableInt32Wrapper(84));
}
/// <summary>Extracts the built string from the handler.</summary>
internal string ToStringAndClear()
{
string s = _stringBuilderHandler._stringBuilder is StringBuilder sb?
sb.ToString() :
string.Empty;
_stringBuilderHandler = default;
return(s);
}
/// <summary>Extracts the built string from the handler.</summary>
internal string ToStringAndClear()
{
string s = _stringBuilderHandler._stringBuilder is StringBuilder sb?
StringBuilderCache.GetStringAndRelease(sb) :
string.Empty;
_stringBuilderHandler = default;
return(s);
}
public void AppendLine_AppendsNewLine()
{
var sb = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(1, 2, sb);
Assert.Same(sb, sb.AppendLine(ref iab));
Assert.Same(sb, sb.AppendLine(CultureInfo.InvariantCulture, ref iab));
Assert.Equal(Environment.NewLine + Environment.NewLine, sb.ToString());
}
public void Append_Nop()
{
var sb = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(1, 2, sb);
Assert.Same(sb, sb.Append(ref iab));
Assert.Same(sb, sb.Append(CultureInfo.InvariantCulture, ref iab));
Assert.Equal(0, sb.Length);
}
/// <summary>Creates an instance of the handler..</summary>
/// <param name="literalLength">The number of constant characters outside of interpolation expressions in the interpolated string.</param>
/// <param name="formattedCount">The number of interpolation expressions in the interpolated string.</param>
/// <param name="condition">The condition Boolean passed to the <see cref="Debug"/> method.</param>
/// <param name="shouldAppend">A value indicating whether formatting should proceed.</param>
/// <remarks>This is intended to be called only by compiler-generated code. Arguments are not validated as they'd otherwise be for members intended to be used directly.</remarks>
public WriteIfInterpolatedStringHandler(int literalLength, int formattedCount, bool condition, out bool shouldAppend)
{
if (condition)
{
_stringBuilderHandler = new StringBuilder.AppendInterpolatedStringHandler(literalLength, formattedCount, new StringBuilder(DefaultInterpolatedStringHandler.GetDefaultLength(literalLength, formattedCount)));
shouldAppend = true;
}
else
{
_stringBuilderHandler = default;
shouldAppend = false;
}
}
/// <summary>Creates an instance of the handler..</summary>
/// <param name="literalLength">The number of constant characters outside of interpolation expressions in the interpolated string.</param>
/// <param name="formattedCount">The number of interpolation expressions in the interpolated string.</param>
/// <param name="condition">The condition Boolean passed to the <see cref="Debug"/> method.</param>
/// <param name="shouldAppend">A value indicating whether formatting should proceed.</param>
/// <remarks>This is intended to be called only by compiler-generated code. Arguments are not validated as they'd otherwise be for members intended to be used directly.</remarks>
public AssertInterpolatedStringHandler(int literalLength, int formattedCount, bool condition, out bool shouldAppend)
{
if (condition)
{
_stringBuilderHandler = default;
shouldAppend = false;
}
else
{
// Only used when failing an assert. Additional allocation here doesn't matter; just create a new StringBuilder.
_stringBuilderHandler = new StringBuilder.AppendInterpolatedStringHandler(literalLength, formattedCount, new StringBuilder());
shouldAppend = true;
}
}
/// <summary>Creates an instance of the handler..</summary>
/// <param name="literalLength">The number of constant characters outside of interpolation expressions in the interpolated string.</param>
/// <param name="formattedCount">The number of interpolation expressions in the interpolated string.</param>
/// <param name="condition">The condition Boolean passed to the <see cref="Debug"/> method.</param>
/// <param name="shouldAppend">A value indicating whether formatting should proceed.</param>
/// <remarks>This is intended to be called only by compiler-generated code. Arguments are not validated as they'd otherwise be for members intended to be used directly.</remarks>
public WriteIfInterpolatedStringHandler(int literalLength, int formattedCount, bool condition, out bool shouldAppend)
{
if (condition)
{
// Only used in debug, but could be used on non-failure code paths, so use a cached builder.
_stringBuilderHandler = new StringBuilder.AppendInterpolatedStringHandler(literalLength, formattedCount,
StringBuilderCache.Acquire(DefaultInterpolatedStringHandler.GetDefaultLength(literalLength, formattedCount)));
shouldAppend = true;
}
else
{
_stringBuilderHandler = default;
shouldAppend = false;
}
}
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();
var actual = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(0, 0, actual, provider);
// struct
expected.AppendFormat(provider, "{0}", t);
iab.AppendFormatted(t);
AssertTss(t, null);
// struct, format
expected.AppendFormat(provider, "{0:X2}", t);
iab.AppendFormatted(t, "X2");
AssertTss(t, "X2");
// struct, alignment
expected.AppendFormat(provider, "{0,3}", t);
iab.AppendFormatted(t, 3);
AssertTss(t, null);
// struct, alignment, format
expected.AppendFormat(provider, "{0,-3:X2}", t);
iab.AppendFormatted(t, -3, "X2");
AssertTss(t, "X2");
Assert.Equal(expected.ToString(), actual.ToString());
actual.Append(ref iab);
}
Test(new FormattableInt32Wrapper(42));
Test(new SpanFormattableInt32Wrapper(84));
Test((FormattableInt32Wrapper?)new FormattableInt32Wrapper(42));
Test((SpanFormattableInt32Wrapper?)new SpanFormattableInt32Wrapper(84));
}
public void AppendLiteral()
{
var expected = new StringBuilder();
var actual = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(0, 0, actual);
foreach (string s in new[] { "", "a", "bc", "def", "this is a long string", "!" })
{
expected.Append(s);
iab.AppendLiteral(s);
}
actual.Append(ref iab);
Assert.Equal(expected.ToString(), actual.ToString());
}
public void AppendFormatted_ReferenceTypes_ICustomFormatter()
{
var provider = new ConcatFormatter();
var expected = new StringBuilder();
var actual = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(0, 0, actual, 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);
iab.AppendFormatted(tss);
AssertTss(tss, null);
// object, format
expected.AppendFormat(provider, "{0:X2}", tss);
iab.AppendFormatted(tss, "X2");
AssertTss(tss, "X2");
// object, alignment
expected.AppendFormat(provider, "{0,3}", tss);
iab.AppendFormatted(tss, 3);
AssertTss(tss, null);
// object, alignment, format
expected.AppendFormat(provider, "{0,-3:X2}", tss);
iab.AppendFormatted(tss, -3, "X2");
AssertTss(tss, "X2");
}
}
actual.Append(provider, ref iab);
Assert.Equal(expected.ToString(), actual.ToString());
}
public void AppendFormatted_ValueTypes()
{
void Test <T>(T t)
{
var expected = new StringBuilder();
var actual = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(0, 0, actual);
// struct
expected.AppendFormat("{0}", t);
iab.AppendFormatted(t);
Assert.True(string.IsNullOrEmpty(((IHasToStringState)t).ToStringState.LastFormat));
AssertModeMatchesType(((IHasToStringState)t));
// struct, format
expected.AppendFormat("{0:X2}", t);
iab.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);
iab.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);
iab.AppendFormatted(t, alignment, "X2");
Assert.Equal("X2", ((IHasToStringState)t).ToStringState.LastFormat);
AssertModeMatchesType(((IHasToStringState)t));
}
actual.Append(ref iab);
Assert.Equal(expected.ToString(), actual.ToString());
}
Test(new FormattableInt32Wrapper(42));
Test(new SpanFormattableInt32Wrapper(84));
Test((FormattableInt32Wrapper?)new FormattableInt32Wrapper(42));
Test((SpanFormattableInt32Wrapper?)new SpanFormattableInt32Wrapper(84));
}
public void DebugHandler_AppendOverloads_MatchStringBuilderHandler()
{
var actual = new Debug.AssertInterpolatedStringHandler(0, 0, condition: false, out bool shouldAppend);
Assert.True(shouldAppend);
var sb = new StringBuilder();
var expected = new StringBuilder.AppendInterpolatedStringHandler(0, 0, sb);
actual.AppendLiteral("abcd");
expected.AppendLiteral("abcd");
actual.AppendFormatted(123);
expected.AppendFormatted(123);
actual.AppendFormatted(45.6, 10);
expected.AppendFormatted(45.6, 10);
actual.AppendFormatted(default(Guid), "X");
expected.AppendFormatted(default(Guid), "X");
DateTime dt = DateTime.UtcNow;
actual.AppendFormatted(dt, -100, "r");
expected.AppendFormatted(dt, -100, "r");
actual.AppendFormatted("hello");
expected.AppendFormatted("hello");
actual.AppendFormatted("world", -10, null);
expected.AppendFormatted("world", -10, null);
actual.AppendFormatted((ReadOnlySpan <char>) "nice to");
expected.AppendFormatted((ReadOnlySpan <char>) "nice to");
actual.AppendFormatted((ReadOnlySpan <char>) "nice to", 0, "anything");
expected.AppendFormatted((ReadOnlySpan <char>) "nice to", 0, "anything");
actual.AppendFormatted((object)DayOfWeek.Monday, 42, null);
expected.AppendFormatted((object)DayOfWeek.Monday, 42, null);
VerifyAssert(() => Debug.Assert(false, actual), sb.ToString());
}
public void AppendFormatted_ReferenceTypes_CreateProviderFlowed()
{
var provider = new CultureInfo("en-US");
var sb = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(1, 2, sb, provider);
foreach (IHasToStringState tss in new IHasToStringState[] { new FormattableStringWrapper("hello"), new SpanFormattableStringWrapper("hello") })
{
iab.AppendFormatted(tss);
Assert.Same(provider, tss.ToStringState.LastProvider);
iab.AppendFormatted(tss, 1);
Assert.Same(provider, tss.ToStringState.LastProvider);
iab.AppendFormatted(tss, "X2");
Assert.Same(provider, tss.ToStringState.LastProvider);
iab.AppendFormatted(tss, 1, "X2");
Assert.Same(provider, tss.ToStringState.LastProvider);
}
sb.Append(ref iab);
}
public void AppendFormatted_InvalidTryFormatCharsWritten_Throws(bool tooBig) // vs tooSmall
{
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(0, 0, new StringBuilder());
Assert.Throws <FormatException>(() => iab.AppendFormatted(new InvalidCharsWritten(tooBig)));
}
public void AppendFormatted_ReferenceTypes()
{
var expected = new StringBuilder();
var actual = new StringBuilder();
StringBuilder.AppendInterpolatedStringHandler iab = new StringBuilder.AppendInterpolatedStringHandler(0, 0, actual);
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);
iab.AppendFormatted(o);
if (o is IHasToStringState tss1)
{
Assert.True(string.IsNullOrEmpty(tss1.ToStringState.LastFormat));
AssertModeMatchesType(tss1);
}
// object, format
expected.AppendFormat("{0:X2}", o);
iab.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);
iab.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);
iab.AppendFormatted(o, alignment, "X2");
if (o is IHasToStringState tss4)
{
Assert.Equal("X2", tss4.ToStringState.LastFormat);
AssertModeMatchesType(tss4);
}
}
}
}
actual.Append(ref iab);
Assert.Equal(expected.ToString(), actual.ToString());
}
