public void FixedStringBuilder_TryExpand_Can_Always_Expand_Capacity()
{
FixedStringBuilder target = new FixedStringBuilder(1);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsTrue(target.TryExpand(2));
Assert.IsTrue(target.TryAppend('X', 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_TryExpand_Rejects_Negative_Capacity()
{
FixedStringBuilder target = new FixedStringBuilder(0);
try
{
target.TryExpand(-1);
Assert.Fail();
}
catch (ArgumentOutOfRangeException ex)
{
Assert.AreEqual(typeof(ArgumentOutOfRangeException), ex.GetType());
}
}