public void Append_ThrowsIfNotEnoughSpace()
{
var formatter = new InplaceStringBuilder(1);
var exception = Assert.Throws <InvalidOperationException>(() => formatter.Append("123"));
Assert.Equal("Not enough capacity to write '3' characters, only '1' left.", exception.Message);
}
public void Build_ThrowsIfNotEnoughWritten()
{
var formatter = new InplaceStringBuilder(5);
formatter.Append("123");
var exception = Assert.Throws <InvalidOperationException>(() => formatter.ToString());
Assert.Equal("Entire reserved capacity was not used. Capacity: '5', written '3'.", exception.Message);
}
public void Capacity_ThrowsIfAppendWasCalled()
{
var formatter = new InplaceStringBuilder(3);
formatter.Append("123");
var exception = Assert.Throws <InvalidOperationException>(() => formatter.Capacity = 5);
Assert.Equal("Cannot change capacity after write started.", exception.Message);
}
public void ToString_ThrowsIfCapacityNotUsed()
{
var formatter = new InplaceStringBuilder(10);
formatter.Append("abc");
var exception = Assert.Throws <InvalidOperationException>(() => formatter.ToString());
Assert.Equal("Entire reserved capacity was not used. Capacity: '10', written '3'.", exception.Message);
}
public void Capacity_GetReturnsCorrectValue()
{
var formatter = new InplaceStringBuilder(3);
Assert.Equal(3, formatter.Capacity);
formatter.Capacity = 10;
Assert.Equal(10, formatter.Capacity);
formatter.Append("abc");
Assert.Equal(10, formatter.Capacity);
}
public void ToString_ReturnsStringWithAllAppendedValues()
{
var s1 = "123";
var c1 = '4';
var s2 = "56789";
var seg = new StringSegment("890123", 2, 2);
var formatter = new InplaceStringBuilder();
formatter.Capacity += s1.Length + 1 + s2.Length + seg.Length;
formatter.Append(s1);
formatter.Append(c1);
formatter.Append(s2, 0, 2);
formatter.Append(s2, 2, 2);
formatter.Append(s2, 4, 1);
formatter.Append(seg);
Assert.Equal("12345678901", formatter.ToString());
}
static string GetJoinedStringValueFromArray(string[] values)
{
// Calculate final length
int length = 0;
for (int i = 0; i < values.Length; i++)
{
string value = values[i];
// Skip null and empty values
if (value != null && value.Length > 0)
{
if (length > 0)
{
// Add seperator
length++;
}
length += value.Length;
}
}
#if NETCOREAPP || NETSTANDARD2_1
// Create the new string
return(string.Create(length, values, (span, strings) => {
int offset = 0;
// Skip null and empty values
for (int i = 0; i < strings.Length; i++)
{
string value = strings[i];
if (value != null && value.Length > 0)
{
if (offset > 0)
{
// Add seperator
span[offset] = ',';
offset++;
}
value.AsSpan().CopyTo(span.Slice(offset));
offset += value.Length;
}
}
}));
#else
#pragma warning disable CS0618
var sb = new InplaceStringBuilder(length);
#pragma warning restore CS0618
bool hasAdded = false;
// Skip null and empty values
for (int i = 0; i < values.Length; i++)
{
string value = values[i];
if (value != null && value.Length > 0)
{
if (hasAdded)
{
// Add seperator
sb.Append(',');
}
sb.Append(value);
hasAdded = true;
}
}
return(sb.ToString());
#endif
}
public void Append_ThrowsIfValueIsNull()
{
var formatter = new InplaceStringBuilder(3);
Assert.Throws <ArgumentNullException>(() => formatter.Append(null as string));
}
public void Append_ThrowIfValueLenghtMinusOffsetSmallerThanCount()
{
var formatter = new InplaceStringBuilder(3);
Assert.Throws <ArgumentOutOfRangeException>(() => formatter.Append("abc", 1, 3));
}
public void Append_ThrowsIfOffsetIsNegative()
{
var formatter = new InplaceStringBuilder(3);
Assert.Throws <ArgumentOutOfRangeException>(() => formatter.Append("abc", -1, 3));
}