public void FixedStringBuilder_Clear_Resets_Builder()
{
FixedStringBuilder target = new FixedStringBuilder(1);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual("X", target.ToString());
target.Clear();
Assert.AreEqual(string.Empty, target.ToString());
}
public void FixedStringBuilder_TryAppend_Does_Not_Exceed_Capacity_With_Character()
{
FixedStringBuilder target = new FixedStringBuilder(1);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsFalse(target.TryAppend('X', 0));
Assert.AreEqual("X", target.ToString());
}
public void FixedStringBuilder_TryAppend_Rolls_Back_When_Capacity_Is_Reached_With_String_And_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(4);
Assert.IsTrue(target.TryAppend("XX", 1, 0));
Assert.IsFalse(target.TryAppend("XX", 1, 0));
Assert.AreEqual(string.Empty, target.ToString());
}
public void FixedStringBuilder_TryAppend_Does_Not_Exceed_Capacity_With_String_And_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(4);
Assert.IsTrue(target.TryAppend("XX", 1));
Assert.IsFalse(target.TryAppend("XX", 1));
Assert.AreEqual("XX", target.ToString());
}
static void Main(string[] args)
{
FixedStringBuilder sb = new FixedStringBuilder(100);
string fieldValue = "12345";
int startPos = 16;
sb.Replace(startPos, fieldValue);
string buffer = sb.ToString();
}
public void FixedStringBuilder_TryResize_Can_Always_Expand_Capacity()
{
FixedStringBuilder target = new FixedStringBuilder(1);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsTrue(target.TryResize(2, 0));
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual("XX", target.ToString());
}
public void FixedStringBuilder_TryResize_Only_Reduces_Capacity_If_There_Is_Room()
{
FixedStringBuilder target = new FixedStringBuilder(3);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsFalse(target.TryResize(1, 0));
Assert.IsTrue(target.TryResize(2, 0));
Assert.AreEqual("XX", target.ToString());
}
public void FixedStringBuilder_TryExpand_Does_Nothing_If_Capacity_Is_Already_Larger()
{
FixedStringBuilder target = new FixedStringBuilder(3);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsFalse(target.TryExpand(2));
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual("XXX", target.ToString());
}
public void FixedStringBuilder_TryAppend_Keeps_Rollback_When_Capacity_Is_Reached_With_Character_And_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(2);
Assert.IsTrue(target.TryAppend('X', 1));
int actual = 0;
Assert.IsFalse(target.TryAppend('X', 1, out actual));
Assert.AreEqual(1, actual);
Assert.AreEqual("X", target.ToString());
}
public void FixedStringBuilder_TryAppend_Sets_Rollback_With_Character_And_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(3);
Assert.IsTrue(target.TryAppend('X', 0));
int actual = 0;
Assert.IsTrue(target.TryAppend('X', 1, out actual));
Assert.IsFalse(target.TryAppend('X', 1, actual));
Assert.AreEqual(1, actual);
Assert.AreEqual("X", target.ToString());
}
public override string ToString()
{
// Create a new fixed string builder instance.
FixedStringBuilder builder = new FixedStringBuilder();
// Emit the prototype.
builder.Append(this.Prototype.ToString());
// Emit and append the body.
builder.Append(this.Body.ToString());
// Trim and return the resulting string.
return(builder.ToString().Trim());
}
public override string ToString()
{
// Create a new fixed string builder instance.
FixedStringBuilder builder = new FixedStringBuilder();
// Emit the header.
builder.Append($"{this.Identifier}:");
// Loop through all instructions.
foreach (Instruction instruction in this.Instructions)
{
// Emit instruction to the builder.
builder.Append(instruction.ToString());
}
// Return the resulting string.
return(builder.ToString());
}
public void TestStringBuilders()
{
{
Span <char> buf = stackalloc char[128];
var bdr = new FixedStringBuilder(buf);
bdr.AppendLine("Hello World");
bdr.Append("Hello");
bdr.Append(' ');
bdr.Append(12);
bdr.Append(' ');
bdr.AppendLine("Worlds");
int numReplaced = bdr.Replace('e', 'u');
Assert.AreEqual(2, numReplaced);
var expected = "Hullo World" + Environment.NewLine + "Hullo 12 Worlds" + Environment.NewLine;
Assert.AreEqual(expected.Length, bdr.Length);
Assert.IsTrue(bdr.ReadOnlySpan.SequenceEqual(expected));
numReplaced = bdr.Replace("Hullo", "Hi");
Assert.AreEqual(2, numReplaced);
expected = expected.Replace("Hullo", "Hi");
Assert.IsTrue(bdr.ReadOnlySpan.SequenceEqual(expected));
numReplaced = bdr.Replace("Hi", "");
Assert.AreEqual(2, numReplaced);
expected = expected.Replace("Hi", "");
Assert.IsTrue(bdr.ReadOnlySpan.SequenceEqual(expected));
bdr.Replace("World", "World");
Assert.IsTrue(bdr.ReadOnlySpan.SequenceEqual(expected));
bdr.Replace("Florka", "--");
Assert.IsTrue(bdr.ReadOnlySpan.SequenceEqual(expected));
bdr.Replace("Florka", "Florka");
Assert.IsTrue(bdr.ReadOnlySpan.SequenceEqual(expected));
bdr.Clear();
Assert.AreEqual(0, bdr.Length);
Assert.AreEqual("", bdr.ToString());
bdr.Append("Koko");
bdr.Append('s');
Assert.AreEqual("Kokos".Length, bdr.Length);
Assert.IsTrue(bdr.ReadOnlySpan.SequenceEqual("Kokos"));
}
{
var sbdr = new ValueStringBuilder(8);
sbdr.AppendLine("Hello World");
sbdr.Append("Hello");
sbdr.Append(' ');
sbdr.Append(12u);
sbdr.Append(' ');
sbdr.AppendLine("Worlds");
var numReplaced = sbdr.Replace('e', 'u');
Assert.AreEqual(2, numReplaced);
var expected = "Hullo World" + Environment.NewLine + "Hullo 12 Worlds" + Environment.NewLine;
Assert.AreEqual(expected.Length, sbdr.Length);
Assert.IsTrue(sbdr.ReadOnlySpan.SequenceEqual(expected));
numReplaced = sbdr.Replace("Hullo", "Hi");
Assert.AreEqual(2, numReplaced);
expected = expected.Replace("Hullo", "Hi");
Assert.IsTrue(sbdr.ReadOnlySpan.SequenceEqual(expected));
numReplaced = sbdr.Replace("Hi", "");
Assert.AreEqual(2, numReplaced);
expected = expected.Replace("Hi", "");
Assert.IsTrue(sbdr.ReadOnlySpan.SequenceEqual(expected));
sbdr.Replace("World", "World");
Assert.IsTrue(sbdr.ReadOnlySpan.SequenceEqual(expected));
sbdr.Replace("Florka", "--");
Assert.IsTrue(sbdr.ReadOnlySpan.SequenceEqual(expected));
sbdr.Replace("Florka", "Florka");
Assert.IsTrue(sbdr.ReadOnlySpan.SequenceEqual(expected));
sbdr.Clear();
Assert.AreEqual(0, sbdr.Length);
Assert.AreEqual("", sbdr.ToString());
sbdr.Append("Koko");
sbdr.Append('s');
Assert.AreEqual("Kokos".Length, sbdr.Length);
Assert.IsTrue(sbdr.ReadOnlySpan.SequenceEqual("Kokos"));
}
}
